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EK-DSRZD-IM-002

February 1992

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Document:	MUXserver 380 Hardware Installation Manual
Order Number:	EK-DSRZD-IM
Revision:	002
Pages:	84
Original Filename:

OCR Text

MUXserver 380
Hardware Installation Manual
Order Number EK-DSRZD-IM-002

2nd Edition

Second Edition - February 1992
The information in this document is subject to change without notice and should not be construed
as a commitment by Digital Equipment Corporation (Australia) Pty. Limited. Digital Equipment
Corporation (Australia) Pty. Limited assumes no responsibility for any errors that may appear in
this document.
The software described in this document is furnished under a license and may be used or copied only
in accordance with the terms of such license.
No responsibility is assumed for the use or reliability of software on equipment that is not supplied by
Digital Equipment Corporation (Australia) Pty. Limited or its affiliated companies.
Copyright ©1992 by Digital Equipment Corporation (Australia) Pty. Limited.
All Rights Reserved.
Printed in Australia.
The postpaid READER’S COMMENTS form on the last page of this document requests the user’s critical
evaluation to assist in preparing future documentation.

The following are trademarks of Digital Equipment Corporation:
DEC
DEC/CMS
DEC/MMS
DECnet
DECstation
DECsystem–10
DECSYSTEM–20
DECUS
DECwriter

DIBOL
EduSystem
IAS
MASSBUS
PDP
PDT
RSTS
RSX
ULTRIX

UNIBUS
UWS
VAX
VAXcluster
VMS
VT

Contents
Preface

viii

Chapter 1 Introduction
1.1
1.2
1.3
1.4
1.5
1.6
1.7

Overview of the MUXserver 380 Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
Typical MUXserver 380 Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
The MUXserver 380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
Connecting the MUXserver 380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6
Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–10
Items Required for MUXserver 380 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–11
Service Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–12
1.7.1
Digital On-Site Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–13
1.7.2
Installation Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–13
1.7.3
Software Product Service Agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–13
1.7.4
Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–13

Chapter 2 Quick Installation Guide
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9

Associated Preliminary Activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Preparing the MUXserver 380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Site Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Hardware Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Testing the MUXserver 380 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Connecting the MUXserver 380 to the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Completing the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Installation Difficulties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Associated Subsequent Activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3

iii

Chapter 3 Preparing the MUXserver 380
3.1
3.2
3.3
3.4

Unpacking the MUXserver 380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Unpacking the Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Unpacking the Country Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Pre-Installation Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
3.4.1
Verifying the Voltage Select Switch Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
3.4.2
Site Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3

Chapter 4 Site Verification
4.1
4.2
4.3
4.4

4.5

Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
Cabling Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.4.1
Standard Ethernet Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
4.4.2
ThinWire Ethernet Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
4.4.3
Power Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
4.4.4
Maximum Serial Communication Distances . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
Acoustic Noise Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4

Chapter 5 Hardware Installation
5.1
5.2

5.3

5.4

5.5
5.6

Re-check the Voltage Select Switch Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.2.1
Desk Top Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.2.2
Wall Mounted Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.2.3
Rack Mounted Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.2.4
Satellite Equipment Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
Testing the MUXserver 380 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
5.3.1
Selecting ThinWire Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
5.3.2
Connecting the ThinWire T-Connector and Terminators . . . . . . . . . . . . . . . . . 5–4
5.3.3
Connecting Power to the MUXserver 380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5
5.3.4
Running Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6
Connecting to the Ethernet LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
5.4.1
Connecting to the ThinWire Ethernet LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–9
5.4.2
Connecting to The Standard Ethernet LAN . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10
Connecting a Terminal to the Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12
Connecting Synchronous Link Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–14
5.6.1
Connecting a Modem to a 50-Pin Connector . . . . . . . . . . . . . . . . . . . . . . . . . 5–14
5.6.2
Connecting a Co-located DECmux 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–17
5.6.3
Connecting a Modem to a 25-Pin Connector . . . . . . . . . . . . . . . . . . . . . . . . . 5–17
iv

5.7
5.8
5.9

Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–19
Running Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–20
Installation Completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–20

Chapter 6 Installation Difficulties
6.1

6.2

6.3

The 7-Segment Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.1.1
Diagnostic Dot Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
6.1.2
Diagnostic Dot Blinking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
6.1.3
7-Segment Display Off and Green Ethernet LED OFF . . . . . . . . . . . . . . . . . . 6–2
6.1.4
7-Segment Display Shows "3" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.1.5
7-Segment Display Flashing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.2.1
Error Message 1003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.2.2
Error Message 1007 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.2.3
Error Message 1008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
6.2.4
Error Message 1010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
6.2.5
Error Message 1011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
6.2.6
Error Message 1012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
Down-Line Load Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.3.1
Down-Line Load Starts, Then Fails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.3.2
Down-Line Load Does Not Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5

Appendix A Connector Pin Descriptions
A.1
A.2
A.3
A.4

Ethernet Transceiver Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25-Pin D-Type Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
50-Pin D-Type Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supervisor Port Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A–1
A–2
A–3
A–5

Appendix B Ordering Information
B.1
B.2
B.3
B.4
B.5
B.6

B.7

Products in the MUXserver 380 Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–1
Country Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–2
MUXserver 380 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3
MUXserver 380 Software Distribution Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3
Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3
B.6.1
VMS Software Documentation Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3
B.6.2
ULTRIX Software Documentation Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–4
B.6.3
Hardware Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–4
Ordering Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–5
v

Appendix C Instructions For UK Installations
C.1
C.2
C.3
C.4

Service Category Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Direct Connection (BABT/SITS/89/43 Section 4.2) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Apparatus Between MUXserver 380 and Digital Circuit (PTT) . . . . . . . . . . . . . . . . . .
Safety Warning for UK Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C–1
C–2
C–2
C–2

GLOSSARY
Index
Figures
1–1
1–2
1–3
1–4
1–5
1–6
1–7
1–8
3–1
3–2
5–1
5–2
5–3
5–4
5–5
5–6
5–7
5–8
5–9
5–10
5–11
5–12
5–13
5–14
5–15
5–16
5–17
5–18

MUXserver 380 Network Configuration Principles . . . . . . . . . . . . . . . . . . . . . . 1–3
MUXserver 380 Model DSRZD-XX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4
MUXserver 380 Controls, Indicators and Connectors . . . . . . . . . . . . . . . . . . . . . 1–5
Standard Ethernet Coaxial Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . 1–7
ThinWire Ethernet Coaxial Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . 1–8
Synchronous Link Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9
Supervisor Port Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–10
MUXserver 380 Installation Activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–11
Supply Voltage Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Supply Voltage Select Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3
Removing the Protective Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
Rack Mounting the MUXserver 380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
Selecting ThinWire Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
Connecting the ThinWire T-Connector and Terminators . . . . . . . . . . . . . . . . . . 5–5
Connecting Power to the MUXserver 380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6
7-Segment Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7
Connecting to the ThinWire Ethernet LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10
Unlocking the Slide Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–11
Connecting the Transceiver Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–11
Connecting to the Supervisor Port Connector . . . . . . . . . . . . . . . . . . . . . . . . . 5–12
Connecting to the Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–13
Connecting to 25-Pin D-type Connector Terminal . . . . . . . . . . . . . . . . . . . . . . 5–14
Connecting to the 50-Pin D-Type Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–16
Connecting the Adaptor Cable and Extension Cable . . . . . . . . . . . . . . . . . . . . 5–16
Connecting a V24/EIA-232-D Adaptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–17
Connecting a BC22F-xx Extension Cable to the MUXserver 380 . . . . . . . . . . . 5–18
Connecting the V24/EIA-232-D Adaptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–19
Connecting Power to the MUXserver 380 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–20

Tables
1–1
1–2
1–3
1–4
4–1
4–2
4–3
4–4
4–5
4–6
5–1
5–2
6–1
A–1
A–2
A–3
A–4
B–1
C–1

MUXserver 380 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
MUXserver 380 Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
MUXserver 380 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6
Synchronous Link Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
Maximum Cable Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
Maximum Serial Communication Distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4
Acoustic Noise Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4
7-Segment Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
Synchronous Link Adaptor and Extension Cables . . . . . . . . . . . . . . . . . . . . . . 5–15
7-Segment Display Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Standard Ethernet Transceiver Interface Pin Description . . . . . . . . . . . . . . . . A–1
25-Pin D-Type Connector Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–2
50-Pin D-Type Connector Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–3
Pin Descriptions for Serial Communication Interface . . . . . . . . . . . . . . . . . . . A–5
MUXserver 380 Product Family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–1
Specifications for Service Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C–1

vii

Preface

Purpose of the Manual
This manual describes the environmental requirements of the MUXserver 380 Remote
Terminal Server and its installation.

Intended Audience
This manual is intended for readers responsible for installing the MUXserver 380 Remote
Terminal Server.

Structure of the Manual
This manual is organized as follows:
Chapter 1

Introduces the MUXserver 380 Remote Terminal Network and its family of
products.

Chapter 2

Summarizes the MUXserver 380 hardware installation activities and presents a
quick-reference guide for the more experienced installer.

Chapter 3

Describes the unpacking and preparation of a MUXserver 380 before its
installation.

Chapter 4

Describes checks to ensure that the selected installation site for a MUXserver
380 has been correctly prepared.

Chapter 5

Describes the detailed procedures for installing and testing a MUXserver 380.
Planning and installation of the entire MUXserver 380 Remote Terminal Network
is described in the MUXserver 320/380 Network Reference Manual.
Installation of the network’s remote DECmux 300s is described in the MUXserver
/DECmux 300 Network Installation Manual.

viii

Chapter 6

Describes the problems that may be encountered during MUXserver 380
installation and possible corrective action.

Appendix A

Describes the pins of the MUXserver 380 hardware connectors.

Appendix B

Lists the ordering codes for the MUXserver 380 products.

Appendix C

Contains instructions which must be observed when the MUXserver 380 is being
installed in the United Kingdom.

Glossary

Defines all abbreviations and special terms used in this manual.

Index

Provides a page reference to the important topics used in this manual.

Other MUXserver 380 Publications
Other MUXserver 380 publications, which might be required during installation, include:
MUXserver 320/380 Software Installation Guide for VMS

AA-PESDA-TE

Describes installing the MUXserver 380 software onto a VAX/VMS
System.
MUXserver 320/380 Software Installation Guide for ULTRIX

AA-PEUUA-TE

Describes installing the MUXserver 380 software onto a VAX or
RISC ULTRIX system.
MUXserver 320/380 Network Reference Manual

AA-PESEA-TE

Describes planning, installing, setting up and management of a
MUXserver 380 network.
MUXserver 320/380 Network Identification Card

EK-DSRZD-IC

Records MUXserver 380 installation details, including
•
•
•

Local equipment locations and identification information,
Remote equipment locations and identification information,
and
Synchronous link details.

Notes
1. The MUXserver 380 Hardware Installation Manual (this manual) and the MUXserver
320/380 Network Identification Card are delivered with each MUXserver 380 hardware
product.
2. The MUXserver 320/380 Network Reference Manual, Release Notes and the relevant
Software Installation Guide are delivered with each MUXserver 380 software distribution
kit.
3. Additional copies of these documents may be ordered from Digital Equipment Corporation.

Other Relevant Publications
Reference to the following Digital Equipment Corporation publications may be required
during installation of the MUXserver 380 network:
MUXserver/DECmux 300 Network Installation Manual.

EK-DSRZC-IM

Describes the installation of the MUXserver 380 Network’s remote
unit - the DECmux 300
DECconnect System Planning and Configuration Guide

EK-DECSYS-CG

Describes the planning and configuration of a DECconnect System
network.
DECconnect System Facilities Cabling Installation Guide

EK-DECSYS-FC

Describes the procedures for installing cables for a DECconnect
System network.
EK-DECSY-GD

DECconnect System General Description
Provides an overview of the DECconnect System products and
services.
Telecommunications and Networks Buyer’s Guide
Provides a comprehensive description of Digital Equipment
Corporation’s networking and communications products, including
ordering information.

Notes
1. The MUXserver/DECmux 300 Network Installation Manual is delivered with each DECmux 300.
2. Additional copies, and copies of other manuals, may be ordered from Digital Equipment
Corporation.

Conventions
Throughout this manual:
•

The overall MUXserver 380 Remote Terminal Server network is referred to as the
MUXserver 380 Network,

•

The Local Unit component of the MUXserver 380 Network (the MUXserver 380 Remote
Terminal Server) is referred to as the MUXserver 380, and

•

The Remote Unit component of the MUXserver 380 Network (the DECmux 300 Remote
Terminal Multiplexer) is referred to as the DECmux 300.

Also in this manual, Notes, Cautions and Warnings have the following meanings:
Note

The associated information is important to the understanding of the activities
being described.

Caution

Incorrect application of the associated information can cause equipment damage.

Warning

Incorrect application of the associated information can cause injury to the user or
to other people.

UK Installations
Instructions contained in Appendix C must be observed when the MUXserver 380 product is
being installed in the United Kingdom.

FCC NOTICE
The equipment described in this manual generates, uses and may emit radio frequency energy.
The equipment has been type tested and found to comply with the limits for a Class A
computing device pursuant to Subpart J Part 15 of FCC Rules, which are designed to provide
reasonable protection against such a radio frequency interface when operated in a commercial
environment.
Operation of this equipment in a residential area may cause interference, in which case the
user at his own expense may be required to take measures to correct the interference.

Hazardous Voltages
WARNING
Ethernet installations may extend to thousands of metres and involve many separate
items of equipment. To prevent hazardous voltages appearing on the installation, it is
important that all the equipment be part of a common equipotential system as defined
in IEC publications 364-4-41 clauses 413.1.2 and 413.1.6. Where it is required to couple
equipment outside of the main equipotential bonded area via Ethernet, then optical
repeaters or other such galvanically isolated measures must be employed. If in doubt,
refer to Digital Equipment Corporation for advice.

xii

Chapter 1
Introduction
1.1 Overview of the MUXserver 380 Network
The MUXserver 380 Remote Terminal Network connects remote terminals (or other asynchronous port devices) to an Ethernet Local Area Network (LAN).
The network includes one MUXserver 380 Remote Terminal Server which is connected to the
host computer system via an Ethernet Local Area Network (LAN). The network supports up
to 128 active remote asynchronous terminals or printers, via synchronous links and remote
terminal multiplexers as follows:
•

Up to eight synchronous links may be connected, via modems, to the MUXserver 380.

•

Up to three DECmux 300 remote terminal multiplexers may be connected, via modems,
in a daisy-chain fashion to each synchronous link. However, the total MUXserver 380
network is limited to sixteen DECmux 300s.

•

Depending on its particular model and configuration, each DECmux 300 may have 4, 8,
16 or 32 asynchronous ports.

•

Up to eight synchronous links are supported by the MUXserver 380 up to a maximum
aggregate speed of 128 Kbps.

•

The total number of asynchronous devices attached to the MUXserver 380 network is
limited only by the available asynchronous ports on the DECmux 300s.

•

The number of active users is limited to 128.

•

The number of sessions is limited to 512.

The network connects each remote terminal to the host LAN with access to certain LAT and
INTERNET services offered by the LAN.
The MUXserver 320/380 Network Reference Manual describes the features of the MUXserver
380 remote terminal network.
The MUXserver 380 product family consists of two variants of the MUXserver 380 and eight
variants of the DECmux 300 which are listed in Table B–1.

Introduction 1–1

1.2 Typical MUXserver 380 Network Configuration
Figure 1–1 illustrates the configuration principles of a MUXserver 380 network. It shows:
•

One MUXserver 380 connected to either an ULTRIX load host or VMS load host via an
Ethernet local area network,

•

A console terminal connected to the MUXserver 380’s Supervisor port,

•

Up to eight synchronous links serviced by the MUXserver 380,

•

Up to three DECmux 300s connected, in daisy-chain fashion, to each synchronous link.
Note, however, that the total MUXserver 380 network is limited to sixteen DECmux 300s.

Up to six of the MUXserver 380’s links may, alternatively, be configured as asynchronous
ports.
Many different configurations for the network are possible but all are subject to the following
configuration constraints:
•

There can be only one MUXserver 380 in a MUXserver 380 network, but there may be
many MUXserver 380s on a single LAN.

•

The maximum number of DECmux 300s in a MUXserver 380 network is 16.

•

The DECmux 300s are connected to the MUXserver 380 via synchronous links either
directly or indirectly via daisy-chaining the DECmux 300s.

•

A maximum of three DECmux 300s can be daisy-chained together.

•

The MUXserver 380 Network must be a linear network - it must not contain circular
synchronous link paths. As a result, there is only one synchronous link path between any
DECmux 300 and the MUXserver 380 and between any two DECmux 300s.

•

Synchronous links must not have a propogation delay of more than 100mS.

•

Because they introduce excessive delays which adversely affect network performance,
satellite links on synchronous links are not supported.

1–2 Introduction

Figure 1–1: MUXserver 380 Network Configuration Principles
ULTRIX
Load Host

VMS
Load Host

HOST Runnning
TELNET

ETHERNET

MUXserver 380
SUPERVISOR
TERMINAL
ASYNC
UP TO EIGHT
SYNCHRONOUS LINKS
SYNC

SYNC

MODEM

MODEM
UP TO 32
ASYNC DEVICES

UP TO 32
ASYNC DEVICES
MODEM

MODEM

DECmux 300

SYNC

MODEM

UP TO 32
ASYNC DEVICES

MODEM

DECmux 300

SYNC

MODEM

UP TO 32
ASYNC DEVICES

MODEM

DECmux 300
SYNC

SN−004−91

1.3 The MUXserver 380
The MUXserver 380 is shown in Figure 1–2.
The MUXserver 380 may be installed in a variety of environments, including offices, computer
rooms and satellite equipment rooms. The MUXserver 380 can be placed on a desk or table,
or can be mounted in a standard rack cabinet. Digital Equipment Corporation can supply a
wall/partition mounting bracket to mount the unit directly onto an office wall or to suspend
it from partitioned office walls. This bracket must be ordered separately. See Appendix B for
ordering information.
All controls, indicators and connectors used to install and operate the MUXserver 380 are
located on the rear panel of the unit, as shown in Figure 1–3.

Introduction 1–3

Figure 1–2: MUXserver 380 Model DSRZD-XX

MUXserver 380

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

SN−001−91

The unit’s controls, indicators and connectors are described briefly in Tables 1–1, 1–2 and 1–3
respectively. Additional information on the connectors and the associated cables is contained
in Chapter 5.

1–4 Introduction

Figure 1–3: MUXserver 380 Controls, Indicators and Connectors
RESET/DUMP BUTTON (D1)

50 PIN DEVICE
CONNECTORS (A−B)
25 PIN DEVICE
CONNECTORS (C/4−H/9)

VOLTAGE SELECT
SWITCH

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

STANDARD ETHERNET
CONNECTOR

POWER CORD
RECEPTACLE
CIRCUIT BREAKER

Thin Wire ETHERNET
CONNECTOR
Thin Wire ETHERNET
LED

DISPLAY
CONSOLE PORT
CONNECTOR

STANDARD/Thin Wire
SELECTOR SWITCH
SN−002−91

Table 1–1: MUXserver 380 Controls
Control

Description

Reset button (D1)

Applying power while this button is pressed loads the unit’s default
parameters.

Voltage select switch

This switch sets the input voltage to the range required (100-120Vac or
220-240Vac).

Circuit breaker

This press-to-reset circuit breaker protects the unit from damage caused
by excess supply current.

Standard/ThinWire
Ethernet selector switch

This switch selects either ThinWire or Standard Ethernet.
Warning: Operating this switch, when the MUXserver 380 software is
running, will have unpredictable results.

Table 1–2: MUXserver 380 Indicators
Indicator

Description

ThinWire Ethernet LED

Indicates that the ThinWire Ethernet connector is selected.

Standard Ethernet LED

Indicates that the standard Ethernet connector is selected.

7-Segment Display

Displays error and status information.

Introduction 1–5

Table 1–3: MUXserver 380 Connectors
Connector

Description

25-pin device connectors

Six 25-pin male D-type connectors connect EIA-232-D/V.24/V.28 devices
to the MUXserver 380.

50-pin device connectors

These two 50-pin male D-type connectors connect devices to the
MUXserver 380. The devices must support one of the following
standards:
•
•
•
•
•
•

EIA-232-D/V.24/V.28
RS-449/RS-423-A
RS-449/RS-422-A/V.36
V.35
Null-modem/RS-422
X.21 data leads only

The devices connect via an adaptor cable.
Standard Ethernet
connector

This 15-pin female D-type connector connects to a standard Ethernet
local area network using transceiver cable.

ThinWire Ethernet
connector

This female BNC connector connects to a ThinWire Ethernet local area
network using ThinWire cable and a T-connector.

Power cable receptacle

The MUXserver 380’s power cable plugs into this receptacle.

Console connector

This 6-pin Modified Modular Jack (MMJ) connects a console to the
MUXserver 380’s Supervisor Port for installation, configuration, or
troubleshooting.

1.4 Connecting the MUXserver 380
Connections can be made to the MUXserver 380 as follows:
•

Ethernet Port
A transceiver cable connects the MUXserver 380 to the Ethernet network via the Ethernet
port (See Figures 1–4 and 1–5). The transceiver cable can be connected to:

•

Another transceiver cable section,

A DELNI Local Network Interconnect,

A transceiver on a standard Ethernet coaxial cable for Digital baseband networks, or

A ThinWire Ethernet Station adaptor (DESTA) on a ThinWire Ethernet coaxial cable
(See to Figure 1–5).

Synchronous Links
A synchronous link on the MUXserver 380 network typically includes the following
components (See Figure 1–6):
*

An adaptor cable which connects the synchronous port to a synchronous modem. The
correct adaptor cable must be used to select the appropriate interface standards for
connection to the modem. The adaptor cables are 60cm (2ft) long and are designed

1–6 Introduction

to be used with the corresponding extension cables. Such cabling is required at both
ends of the synchronous link. Refer to Appendix B for ordering information.
*

A synchronous modem for interfacing between the adaptor cable and the leased
communications line. Modems are required at each end of the communications line.

Link speeds supported by the network depend on the interface selected. Table 1–4 shows
the link speeds supported for the various interfaces.
Local synchronous link connection is also possible by using a RS-422-A/Null Modem unit
interconnect cable (BC19Y-10). This cable directly connects two synchronous links and
no leased communications line is required (See Figure 1–6). If a connection longer than
3m (10ft) provided by the BC19Y-10 is required, a custom cable will have to be made.
•

Supervisor Port
A DEC OFFICE cable (BC16E) connects an asynchronous terminal to the MUXserver
380 (See Figure 1–7). An appropriate adaptor may also be required if the terminal uses
conventional D-type EIA-232-D interface connectors. Refer to Appendix B for additional
information.

Figure 1–4: Standard Ethernet Coaxial Cable Connection
TRANSCEIVER

TRANSCEIVER

STANDARD
ETHERNET
COAXIAL CABLE

TRANSCEIVER

TRANSCEIVER CABLES
DELNI
ETHERJACK

MUXserver 380

MUXserver 380
TRANSCEIVER
CABLES

MUXserver 380

SN−010−91

Introduction 1–7

Figure 1–5: ThinWire Ethernet Coaxial Cable Connection
VAXstation 2000
TERMINATOR
T−CONNECTOR
CONNECTOR

MUXserver 380

CONNECTOR
T−CONNECTOR
CONNECTOR
MUXserver 380

ThinWire ETHERNET CABLE
VAXstation 2000

SN−011−91

1–8 Introduction

Figure 1–6: Synchronous Link Connections
MUXserver 380

ADAPTER
CABLE
RS−422A/NULL MODEM
UNIT INTERCONNECT CABLE
(BC19Y−ID)

"LOCAL" DECmux 300

SYNC MODEM

LEASED
COMMUNICATIONS
LINE

"REMOTE" DECmux 300

SYNC MODEM
ADAPTER
CABLE

TO OTHER
DECmux 300

TO OTHER
DECmux 300
SN−012−91

Table 1–4: Synchronous Link Speeds
Speeds (Kbps)
Interface

Links A and B

Links C to H

V.35

48, 56 and 64

Not supported

X.21 data leads only

2.4, 4.8, 9.6, 14.4, 19.2, 48, 56 and 64

Not supported

V.24/V.28/EIA-232-D

2.4, 4.8, 9.6, 14.4 and 19.2

Null-modem/RS-422

2.4, 4.8, 9.6, 14.4, 19.2, 48, 56 and 64

Not supported

RS-449/RS-423-A

2.4, 4.8, 9.6, 14.4, 19.2, 48, 56 and 64

Not supported

RS-449/RS-422 (V.36)

2.4, 4.8, 9.6, 14.4, 19.2, 48, 56 and 64

Not supported

The maximum cable lengths are detailed in Section 4.4. Ensure that the specified maximum
cables lengths are not exceeded.

Introduction 1–9

Figure 1–7: Supervisor Port Connection

BC16E−xx
DEC OFFICE CABLE

TERMINAL

SN−013−91

1.5 Installation Overview
Installing the MUXserver 380 involves the following activities which are described in this
manual:
•

Determining the installation location and mounting method, and preparing the site,

•

Installing the MUXserver 380 hardware,

•

Verifying the MUXserver 380’s operation, and

•

Connecting the MUXserver 380 to the network.

Installing the MUXserver 380 Software on the load hosts, and subsequent MUXserver 380
software installation and network verification are described, as appropriate in:
•

The MUXserver 320/380 Software Installation Guide (VMS), and

•

The MUXserver 320/380 Software Installation Guide (ULTRIX).

Initial network configuration and ongoing network management are described in the
MUXserver 320/380 Network Reference Manual.
Figure 1–8 shows the major MUXserver 380 installation activities and their sequence.
For the more experienced installer, Chapter 2 contains a summary of the MUXserver
380 hardware installation activities with reference to particular sections, should further
information be required.

1–10 Introduction

Figure 1–8: MUXserver 380 Installation Activities
START

Check on
Associated Activities
Software Installation
on Load Host (s)

MUXserver 380 Software
Installation Guide (VMS) or (ULTRIX)

Network Planning
and Installation

MUXserver 380 Network
Reference Manual

DECmux 300
Installations

MUXserver/DECmux 300
Network Installation Manual

Prepare Site

Chapters 1 and 4

Prepare MUXserver 380

Chapters 3 and 4

Install and Test
MUXserver 380

Chapter 5

Connect to Network
and Test

Chapter 5

END

Associated Activities
Down−line Load and Test
Software Image
Network Configuration
and Management

MUXserver 320/380 Software
Installation Guide (VMS) or (ULTRIX)
MUXserver 320/380 Network
Reference Manual
SN−034−91

1.6 Items Required for MUXserver 380 Installation
The following items may be required for a MUXserver 380 installation:
•

MUXserver 380 Remote Terminal Server, order code DSRZD-Ax, which contains:
*

MUXserver 380,

BNC T-connector, order code H8233-A,

Two BNC 50 ohm terminators, order code H8255-A,

25 pin synchronous link loopback connector, order code H3266-00,

50 pin synchronous link loopback connector, order code H3199,
Introduction

1–11

Rack Mounting Kit, order code H041-AC,

MUXserver 380 Hardware Installation Manual (this document),

MUXserver 320/380 Network Identification Card,

MUXserver 380 Software License, and

Power Cable (supplied with DSRZD-AA only).

•

Country Kit, which contains a power cable suitable for the appropriate country (not
required for DSRZD-AA). Refer to Appendix B.

•

Wall mounting kit, order code H039.

•

Transceiver Cable, BNE3x-xx or BNE4x-xx, for Ethernet connection.

•

Adaptor Cable and Extension Cable, for each synchronous link to be connected. Refer to
Appendix B.

•

DEC OFFICE Cable, BC16E-xx, with the appropriate adaptor (H8571-x), if necessary, for
supervisor port connection.

•

If not already installed at the site, either:
*

For a Standard Ethernet: Transceiver, order code H4000 or equivalent.

For a ThinWire Ethernet:
— BNC T-connector, order code H8223-A, and
— ThinWire Ethernet Station adaptor (DESTA), order code 70-22782-01.

•

MUXserver 380 distribution software for VMS or ULTRIX, see Appendix B.
The distribution software includes a downline loadable image of the MUXserver 380
operational software. This must be installed on at least one load host.
The following additional software products may be required to be installed on each load
host:
*

For VMS load hosts, DECnet Phase IV or later, or

For ULTRIX load hosts, Maintenance Operation Protocol (MOP).

Appendix B lists the available MUXserver 380 accessories.

1.7 Service Options
This section describes the Digital Equipment Corporation hardware and software options that
are available for the MUXserver 380 network.
For additional information, or to arrange return of a faulty MUXserver 380 for repair or
replacement, contact your Digital Services reprentative. Pack the unit correctly using its
original shipping carton and packaging material.

1–12 Introduction

1.7.1 Digital On-Site Service
Digital Equipment Corporation provides on-site service under a service agreement or on a
per-call basis. Trained service specialists perform on-site hardware maintenance.

1.7.2 Installation Service
Installation service includes services provided by trained service specialists for successful
installation of a MUXserver 380 network.

1.7.3 Software Product Service Agreements
Digital Equipment Corporation offers software product service agreements.

1.7.4 Training
Digital Educational Services provides training on installation, maintenance and management
of Digital software. The format varies from seminars to packaged training courses.

Introduction 1–13

1–14 Introduction

Chapter 2
Quick Installation Guide
This chapter provides a summary of the MUXserver 380 hardware installation activities.
If further information is required on any activity, refer to the nominated sections of this or
other manuals as appropriate.

2.1 Associated Preliminary Activities
Installation of the MUXserver 380 hardware requires the following activities to have been
completed:
1.

Plan and install the associated MUXserver 380
network, including installation and testing of
inter-site synchronous links and synchronous
modems.

MUXserver 320/380 Network Reference
Manual

Obtain all equipment and material required for
installation.

Section 1.6

Install the MUXserver 380 software on the load
host(s).

MUXserver 320/380 Software Installation
Guide (VMS) or MUXserver 320380 Software
Installation Guide (ULTRIX)

Install and test all DECmux 300s.

MUXserver/DECmux 300 Network
Installation Manual

2.2 Preparing the MUXserver 380
1.

Unpack cartons and check their contents.

Sections 3.1 to 3.3

Verify the Voltage Select switch setting.

Section 3.4.1

Quick Installation Guide 2–1

2.3 Site Preparation
1.

Ensure that ventilation is adequate and
environmental conditions are correct.

Section 4.2

Ensure that the mains power supply is correct.

Section 4.3

Ensure that correct cables are available.

Section 4.4

Ensure that maximum cable lengths are not
exceeded.

Table 4–4

2.4 Hardware Installation
1.
2.

Desk Top Mounting

Section 5.2.1

Wall Mounting:

Section 5.2.2

Attach the mounting plate to the wall.
Attach the MUXserver 380 to the mounting plate.
3.

Rack Mounting:

Section 5.2.3

Remove the MUXserver 380’s protective cover.
Attach mounting brackets to the MUXserver 380.
Attach the MUXserver 380 to the equipment
rack.

2.5 Testing the MUXserver 380 Hardware
1.

Select ThinWire Ethernet and connect the BNC
T-connector and 50 ohm terminators.

Sections 5.3.1 and 5.3.2

Run self-test (apply power).

Sections 5.3.3 and 5.3.4

Disconnect power.

2.6 Connecting the MUXserver 380 to the Network
1.

Connect the MUXserver 380 to either the
ThinWire or Standard Ethernet.

Section 5.4

Connect a terminal to the console port.

Section 5.5

Connect synchronous modem(s) to 50-pin
synchronous link (Links A and B).

Section 5.6.1

Connect any co-located DECmux 300(s) to 50-pin
synchronous link (Links A and B).

Section 5.6.2

Connect synchronous modem(s) to 25-pin
synchronous links (Links C to H).

Section 5.6.3

2–2 Quick Installation Guide

2.7 Completing the Installation
1.

Conduct final checks.

Section 5.7

Start the MUXserver 380 (apply power).

Section 5.7

Observe self-test results.

Section 5.8

Complete the MUXserver 320/380 Network
Identification Card.

Section 5.9

2.8 Installation Difficulties
For assistance with installation difficulties, refer to Chapter 6.

2.9 Associated Subsequent Activities
For information, activities which follow installation of a MUXserver 380 (described above)
include:
1.

Down-loading and testing the
MUXserver 380 software image

MUXserver 320/380 Software Installation Guide (VMS) or
MUXserver 320380 Software Installation Guide (ULTRIX).

Ongoing network configuration
and management activities

MUXserver 320/380 Network Reference Manual.

Quick Installation Guide 2–3

2–4 Quick Installation Guide

Chapter 3
Preparing the MUXserver 380
3.1 Unpacking the MUXserver 380
Unpack the MUXserver 380 carton and check its contents for:
•

One MUXserver 380, complete with plastic enclosure,

•

One or more accessory cartons (see Section 3.2),

•

One Ethernet loopback connector,

•

One H3199 synchronous link loopback connector,

•

One H041-AC rack mounting kit,

•

One US/CANADA power cable (included with only the DSRZD-AA option),
For other options, the power cable is included in the relevant Country Kit (see Section 3.3),

•

One MUXserver 380 Hardware Installation Manual,

•

One MUXserver 320/380 Network Identification Card, and

•

One MUXserver 380 Software License.

If any contents are missing or damaged, stop unpacking and contact your Digital Equipment
Corporation sales representative.
Retain the carton and all packaging material in case any item needs to be returned to Digital
Equipment Corporation.

3.2 Unpacking the Accessories
The number of accessory carton(s) and their contents depends on the MUXserver 380 options
ordered. Open the accessories carton(s) and check the contents against the ordered items
listed in the bill of materials.
If any items are missing or damaged, stop unpacking and contact your Digital sales representative.

Preparing the MUXserver 380 3–1

Retain the carton(s) and all packaging material in case any item needs to be returned to
Digital Equipment Corporation.

3.3 Unpacking the Country Kit
One country kit is required for each MUXserver 380. As an exception, with MUXserver
380 option AA (North America), the power cable is included with the MUXserver 380 and a
country kit is not required.
Unpack the country kit and check that it contains a suitable power cable.

3.4 Pre-Installation Checks
3.4.1 Verifying the Voltage Select Switch Setting
Caution
Perform this step with care. An incorrect voltage setting will result in damage to the
MUXserver 380.

Peel the voltage label from the MUXserver 380 to expose the voltage select switch.
Check that the voltage select switch is set to the operating range to suit the local supply
voltage. Contact an electrician if you are unsure of the local supply voltage.
If the voltage setting is not set correctly, set it to match the the local supply voltage.
Figure 3–1: Supply Voltage Label

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

V~100−120 V~220−240

SN−014−91

3–2 Preparing the MUXserver 380

Figure 3–2: Supply Voltage Select Switch
FOR 100/120V OPERATION:
SLIDE THE SWITCH TO THE LEFT
UNTIL "120V" IS VISIBLE.
120V

FOR 200/240V OPERATION:
SLIDE THE SWITCH TO THE RIGHT
UNTIL "240V" IS VISIBLE.
240V

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

SN−015−91

3.4.2 Site Preparation
Before installing the MUXserver 380, ensure that its site preparation has been completed by
checking that:
Hardware
1. If the MUXserver 380 is to be connected to a Standard Ethernet:
•

The appropriate baseband or broadband network interface (for example, an
Etherjack junction box, DELNI, DESTA or Ethernet transceiver) is installed, and

•

The required transceiver cabling is installed, tested and tagged (see Section 4.4.1).

2. If the MUXserver 380 is to be connected to a ThinWire Ethernet:
•

The ThinWire Ethernet cabling is installed, tested and tagged, and particularly
*

If the MUXserver 380 is to be installed at the end of the ThinWire segment,
a BNC T-connector and 50 ohm terminator is available, or

If the MUXserver 380 is not to be installed at the end of the ThinWire
segment, a BNC T-connector is available (see Section 4.4.2).

3. If wall mounting is planned, a wall/partition mounting bracket described in Appendix B, is available.
4. If rack mounting is planned, appropriate rack space is available.
5. Synchronous communication lines and the associated modems are installed and ready
for connection to the MUXserver 380.
Preparing the MUXserver 380 3–3

6. Appropriate adaptor cables and extension cables of the correct length are available
for connections to the synchronous modems (see Section 4.4.4).
7. The supervisor port device cable, of correct lengths, is available (see Section 4.4.4).
8. The supervisor port terminal (such as the VT100, VT200 or VT300 series) is ready
for connection to the MUXserver 380.
Software
10. The system/network manager has installed, or is about to install, the distribution
software on the load host(s)
Operating Environment
11. The power outlet matches the MUXserver 380’s power cable, is within 1.8m (6ft) of
the installation site and meets the electrical specifications (see Sections 4.3 and 4.4.3).
12. Sufficient space has been allowed for ventilation of the MUXserver 380 (see Section 4.1).
13. The temperature, altitude and humidity ranges are correct (see Section 4.2).
Chapter 4 provides a detailed description of site verification.

3–4 Preparing the MUXserver 380

Chapter 4
Site Verification
This chapter describes the checks required to ensure that the selected installation site meets
the MUXserver 380’s physical, environmental, electrical and network cabling requirements.

4.1 Ventilation
The air vents at each end of the unit require an unobstructed clearance of 15cm (6in). If
the unit is wall mounted, it should be at least 45cm (18in) above the floor to reduce exposure
to dust from foot traffic.
Check that the selected MUXserver 380 site site will provide:
•

At least 45 cm (18 in) clearance above the floor if the unit is to be wall mounted, and

•

At least 15 cm (6 in) of free airspace around the MUXserver 380’s two air vents.

Table 4–1 lists the dimensions and weight of the MUXserver 380.
Table 4–1: Physical Specifications
Dimension

Measurement

Width

49.3 cm (19.4 in)

Height

16.1 cm (6.3 in)

Depth

31.2 cm (12.3 in)

Weight

8.1 kg (17.1 lbs)

4.2 Environmental Conditions
Check that the environmental conditions at the planned site are within the ranges listed in
Table 4–2.

Site Verification 4–1

Table 4–2: Environmental Specifications
Parameter

Minimum

Maximum

Operating

5°C (41°F)

50°C (122°F)

Non-operating

-40°C (-40°F)

66°C (151°F)

Temperature change

n.a.

20°C/hr (36°F/hr)

Operating

n.a.

2,438 m (8,000ft)

Non-operating

n.a.

4,876 m (16,000ft)

Temperature

Altitude

Relative humidity (Non-condensing)
Operating

10%

95%

Non-operating

10%

95%

If the MUXserver 380 is to be operated at an altitude greater then 2,400m, decrease the operating
temperature specification by 1.85°C for each 1,000 metres above 2,400m (1°F for each 1,000ft above
8,000ft).

4.3 Power Supply
Check that the power supply at the electrical outlet meets the requirements listed in
Table 4–3.
Table 4–3: Electrical Specifications
DSRZD-AA and DSRZD-BA

DSRZD-AB and DSRZD-BB

Supply Voltage

88 to 132Vac RMS
3-wire single phase

176 to 264Vac RMS
1N+PE single phase

Frequency

50 to 60 Hz

Supply Current

1.5A (nominal)

1A (nominal)

Power Consumption

150W (maximum)

Earth Leakage Current

308uA

482uA

4.4 Cabling Requirements
This section describes checks to ensure that correct cabling has been provided for the
MUXserver 380 installation. Additional information on cabling and configuring of local area
networks, and using DECconnect system products is provided in the MUXserver 320/380
Network Reference Manual and the DECconnect System Planning and Configuration Guide.

4–2 Site Verification

4.4.1 Standard Ethernet Connection
Check that the length of a type BME3x-xx and BNE4x-xx transceiver cable to be used
to connect the MUXserver 380 to a Standard Ethernet does not exceed 50m and 12.5m
respectively (see Table 4–4),

4.4.2 ThinWire Ethernet Connection
If a ThinWire Ethernet connection is planned, check that:
•

The ThinWire cable segment length does not exceed 185 m (606ft) - see Table 4–4,

•

Each end of the ThinWire cable segment will be connected to a 50 ohm terminator (unless
connected to a DEMPR - which contains an inbuilt 50 ohm termination),

•

There will be only one ground connection for each ThinWire cable segment,

•

There will be a distance of at least 500mm (19 in) between T-connectors,

•

The number of stations, between terminators, will not exceed 30,

•

ThinWire cable segments will not be configured in a loop, and

•

ThinWire cable segments will not have any branch segments.

4.4.3 Power Cable
Check that the MUXserver 380 will be installed within 1.8m (6ft) from a mains power outlet.
Table 4–4: Maximum Cable Lengths
From

Maximum Distance

Cable Type

MUXserver 380

Transceiver

40m (132ft)
5m (16.4ft)

BNE3x-xx
BNE4x-xx

MUXserver 380

DELNI

40m (132ft)
5m (16.4ft)

BNE3x-xx
BNE4x-xx

MUXserver 380

Power outlet

1.8 m (6ft)

MUXserver 380 power cable

MUXserver 380

DESPR/DEMPR1

185 m (606ft)

H8243-A

1 With no other device in the ThinWire segment

4.4.4 Maximum Serial Communication Distances
Check that the lengths of cables to be used to connect each of the MUXserver 380’s
synchronous links to either a modem or a co-located DECmux 300 do not exceed the limits
listed in Table 4–5.

Site Verification 4–3

Table 4–5: Maximum Serial Communication Distances
Line Protocol

Data Rate

Cable Length

Comments

EIA-232-D/V.24

All supported
speeds

15m (50ft)

The V.24 cable capacitance is assumed to
be 50pF/ft.

RS-423-A

Up to 19.2Kbps
48Kbps
64Kbps

400m (1300ft)
150m (500ft)
130m (400ft)

The RS-423-A cable capacitance is
assumed to be 15pF/ft.

RS-422-A

All supported
speeds

1,200m (3,900ft)

The RS-422-A cable is assumed to
have a capacitance of 15pF/ft and to
be terminated (at the far end) with 100
ohms.

V.35

All supported
speeds

60m (200ft)

Recommended maximum length only.

Note: The total length of synchronous link cables includes extension cables, if used, connected
between the MUXserver 380 and the associated modem.

4.5 Acoustic Noise Levels
Table 4–6 lists the MUXserver 380’s declared acoustic noise levels.
Table 4–6: Acoustic Noise Levels
Acoustics - Declared values per ISO 9296 and ISO 7779:

Idle/Operating

LwAd

LpAm (Bystander Positions)

4.8 bels

33 dBA

Schallemissionswerte - Werteangaben nach ISO 9296 und ISO 7779/DIN45635-19:

Leerlauf/Betrieb

4–4 Site Verification

Schalleistungspegel
LwAd , B(A)

Schalldruckpegel
LpAm , dB(A)
(Zuschauerpositionen)

4,8

Chapter 5
Hardware Installation
5.1 Re-check the Voltage Select Switch Setting
Verify the mains voltage select switch settings as described in Section 3.4.1.

5.2 Installation
5.2.1 Desk Top Installation
For desk-top installation, simply place the MUXserver 380 on the desk.
Allow 15 cm (6 in) of airspace around the MUXserver 380’s two air vents.

5.2.2 Wall Mounted Installation
A wall/partition mounting bracket kit, available from Digital Equipment Corporation, allows
a MUXserver 380 to be attached directly to a wall or suspended from a partitioned office
wall. Installation instructions are provided with the kit. Refer to Appendix B for ordering
information.
Following the instructions provided with the wall-mounting hardware kit (Order No H039):
•

Attach the mounting plate to the wall. Ensure that the MUXserver 380 will have at least
45 cm (18 in) clearance above the floor, and allow 15 cm (6 in) of airspace around the
MUXserver 380’s air vents.

•

Attach the MUXserver 380 to the mounting plate.

5.2.3 Rack Mounted Installation
A rack mounting kit is supplied with each MUXserver 380 or mounting the unit in a standard
rack cabinet. When a unit is rack mounted:
•

The unit’s protective plastic enclosure is removed.

•

No other equipment in the rack or cabinet should obstruct airflow in to or out of the unit.

Hardware Installation 5–1

•

Cooling air enters the right end and leaves the left end of the unit (looking at the connector
panel). Any other forced ventilation inside the rack/cabinet should not oppose this airflow
direction or cause heated air to enter the unit.

To mount the MUXserver 380 in a standard 19 inch customer-supplied rack using the rack
mounting hardware kit supplied with the MUXserver 380:
•

Using a Phillips screwdriver, unscrew the eight screws from the bottom of the MUXserver
380.

•

Remove the covers as shown in Figure 5–1.
Do not re-insert the cover screws.

•

Attach the mounting brackets to the MUXserver 380 using the screws supplied with the
kit as shown in Figure 5–2.

•

Attach the MUXserver 380 to the rack using the mounting screws, clip-on nuts and
brackets supplied with the kit as shown in Figure 5–2.

Figure 5–1: Removing the Protective Covers

SN−018−91

5–2 Hardware Installation

Figure 5–2: Rack Mounting the MUXserver 380

FASTEN BRACKETS USING
THE SCREWS PROVIDED

FASTEN UNIT TO RACK
(SCREWS NOT PROVIDED)
SN−019−91

5.2.4 Satellite Equipment Room
The Satellite Equipment Room is a component of Digital Equipment Corporation’s DECconnect System. It provides a central location for communications devices, such as the
MUXserver 380, that connect ThinWire Ethernet and twisted-pair cable to a standard Ethernet network.
The Satellite Equipment Room can also be configured as the centre of a stand-alone network
and can provide a base from which to expand as network requirements increase. If the
MUXserver 380 is being installed in such an environment, or as part of a DECconnect System
installation, refer to the DECconnect System Installation and Verification Guide.

5.3 Testing the MUXserver 380 Hardware
Test the MUXserver 380 hardware before connecting it to the LAN as follows:
1. Select the ThinWire Ethernet (see Section 5.3.1),
2. Connect the BNC T-connector and both 50 ohm terminators to the MUXserver 380 (see
Section 5.3.2), and
3. Connect power to the MUXserver 380 (see Section 5.3.3) to run the MUXserver 380’s
self-test (see Section 5.3.4).

Hardware Installation 5–3

5.3.1 Selecting ThinWire Ethernet
If the Ethernet selector switch is not already IN, press it IN to select ThinWire Ethernet.
The selector switch will remain in and, when power is applied to the MUXserver 380, the
ThinWire Ethernet LED will light (see Figure 5–3).
Figure 5–3: Selecting ThinWire Ethernet

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

FOR ThinWire OPERATION:
PRESS THE SELECTOR SWITCH
(THE ThinWire ETHERNET LED WILL LIGHT)

SN−020−91

5.3.2 Connecting the ThinWire T-Connector and Terminators
To attach the ThinWire BNC T-connector and two 50 ohm terminators to the MUXserver 380,
refer to Figure 5–4 and:
•

Attach the two 50 ohm terminators to the BNC T-connector,

•

Attach the BNC T-connector to the MUXserver 380’s BNC ThinWire Ethernet connector,
and

•

Turn the barrel of the T-connector clockwise to lock it .

5–4 Hardware Installation

Figure 5–4: Connecting the ThinWire T-Connector and Terminators

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

INSERTING Thin Wire
T−CONNECTOR

LOCKING Thin Wire
T−CONNECTOR

50−OHM
TERMINATOR

SN−021−91

5.3.3 Connecting Power to the MUXserver 380
To connect power to the MUXserver 380:
1. Insert the power cable into the power cable receptacle as shown in Figure 5–5, and
2. Insert the power plug into a power outlet and, if necessary, switch the outlet on.
Check that the green Ethernet LED adjacent to the ThinWire Ethernet connector is illuminated. If it is not, refer to Section 6.1.3.

Hardware Installation 5–5

Figure 5–5: Connecting Power to the MUXserver 380

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

SN−017−91

5.3.4 Running Self-Test
Applying power to the MUXserver 380 starts the unit’s self-test program and, if the LAN is
connected, causes the MUXserver 380 software to be loaded from a load host.
During self-test, the MUXserver 380’s 7-segment display, which is shown in Figure 5–6, will:
•

Display "8" for about five seconds,

•

Be blank for about three seconds, and then

•

Count down from "F" through "5" (excluding "8") as the unit’s internal self-tests are
executed. This takes about 80 seconds. Table 5–1 describes the 7-segment display codes
and the purpose of the display’s decimal point.

If a fatal error is detected during self-test, the count will stop and the 7-segment display will
flash the code of the failed test. If a non-fatal error is detected, the count will continue and
the 7-segment display’s diagnostic dot will blink continuously. Chapter 6 suggests action to
be taken in the event of self-test errors.
When the MUXserver 380 passes self-test:
1. The 7-segment display will display "4", indicating that the MUXserver 380 is attempting
to load the MUXserver 380 software from the host.
2. The MUXserver 380 will continue attempting to load the software.
3. Because the MUXserver 380 is not yet connected to the network, this attempt to load the
software will fail after about two minutes. The MUXserver 380 will then stop attempting
to load the software and the 7-segment display will display "3".

5–6 Hardware Installation

4. After a further 20 seconds, the MUXserver 380 will again attempt to load the MUXserver
380 software from the host, with the 7-segment display showing "4", for another two
minutes.
5. The MUXserver 380 will continue attempting to load the software in this manner, waiting
an increasing time between each 2-minute attempt.
At any time after the 7-segment display shows "3" for the first time:
•

Disconnect the MUXserver 380’s power cable,

•

Disconnect the BNC T-connector and its two terminators from the MUXserver 380’s
ThinWire Ethernet port

•

Continue with the installation by connecting the the MUXserver 380 to the Ethernet as
described in Section 5.4

Figure 5–6: 7-Segment Display

DIAGNOSTIC
DOT

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

SN−023−91

Hardware Installation 5–7

Table 5–1: 7-Segment Display
Display

System Status

Bootstrap tests executing

RAM subsystem test executing

Interrupt subsystem tests executing

Timer tests executing

ROM subsystem tests executing

Ethernet subsystem tests executing (internal loopback)

Ethernet subsystem external loopback test executing

Async subsystem tests executing (internal loopback)

Async subsystem external loopback test executing

System exerciser tests executing

Requesting load

Request load backoff

Requesting dump

Dumping

Rotating
segment

MUXserver 380 software executing

Flashing

Fatal error detected

Diagnostic Dot

System Status

No errors

Off

Fatal error or self-test in progress

Blinking

Nonfatal error detected

5.4 Connecting to the Ethernet LAN
As appropriate, connect the MUXserver 380 to either;
•

The ThinWire Ethernet LAN as described in Section 5.4.1, or

•

The Standard Ethernet LAN as described in Section 5.4.2.

5–8 Hardware Installation

5.4.1 Connecting to the ThinWire Ethernet LAN
To connect the MUXserver 380 to a ThinWire Ethernet LAN:
1. Check that power has been removed from the MUXserver 380.
2. To select the ThinWire Ethernet, if the Ethernet selector switch in not already IN, press
it so that it remains IN.
3. Connect the coaxial cable from the Ethernet to one side of the BNC T-connector. Turn the
barrel of the BNC connector clockwise to lock it.
4. Refer to Figure 5–7 and either:
•

If the MUXserver 380 is not at the end of the ThinWire cable segment, that is if
there are "further" stations on the ThinWire Ethernet, connect the associated coaxial
cable to the other side of the BNC T-connector. Turn the barrel of the BNC connector
clockwise to lock it.

•

If the MUXserver 380 is at the end of the ThinWire cable segment, connect the 50
ohm terminator to the other side of the BNC T-connector. Turn the barrel of the
terminator clockwise to lock it.

5. Attach the BNC T-connector to the MUXserver 380’s BNC ThinWire Ethernet connector.
Turn the barrel of the T-connector clockwise to lock it.
Figure 5–7 shows a a 50 ohm terminator connected to the BNC T-connector at the end of the
cable segment. Note that:
•

The terminator is required only if the MUXserver 380 is at the end of a cable segment.
Two coaxial cables are attached to the T-connector if the MUXserver 380 is not at the end
of a cable segment.

•

The cable segment must be terminated by 50 ohm terminators at both ends unless a
DEMPR or DESPR (which contain an inbuilt 50 ohm termination) is used. If a cable
segment is terminated at one end only with a DEMPR or a DESPR, a terminator must
be connected to the other end.

Hardware Installation 5–9

Figure 5–7: Connecting to the ThinWire Ethernet LAN
VAXstation 2000
TERMINATOR
T−CONNECTOR
CONNECTOR

MUXserver 380

CONNECTOR
T−CONNECTOR
CONNECTOR
MUXserver 380

ThinWire ETHERNET CABLE
VAXstation 2000

SN−011−91

5.4.2 Connecting to The Standard Ethernet LAN
To connect a Standard Ethernet transceiver cable to the MUXserver 380:
1. Check that power has been removed from the MUXserver 380.
2. To select the Standard Ethernet, if the Ethernet selector switch in not already OUT, press
it so that it remains OUT.
3. Unlock the slide latch on the MUXserver 380’s Standard Ethernet connector by pushing
it in the direction shown in Figure 5–8.
4. Connect the transceiver cable and lock the slide latch on the standard Ethernet connector
by pushing it in the direction shown in Figure 5–9.

5–10 Hardware Installation

Figure 5–8: Unlocking the Slide Latch

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

UNLOCK

SN−024−91

Figure 5–9: Connecting the Transceiver Cable

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

LOCK

SN−025−91

Hardware Installation 5–11

5.5 Connecting a Terminal to the Console Port
To connect a terminal to the Supervisor port connector:
1. Insert the modified modular plug (MMP), on the cable, into a female modified modular
jack (MMJ) connector (see Figure 5–10).
2. Insert the modified modular plug (MMP), on the cable, into the female modified modular
jack (MMJ) connector on the terminal (see Figure 5–11). If the terminal has a 25-pin,
male, D-type connector use an H8571-A adaptor (see Figure 5–12).
3. Power up the terminal.
4. Configure the terminal to operate with:
•

Input and Output Speed = 9,600bps

•

Character Size = 8 bits

•

No Parity Checking

•

One Stop Bit

Figure 5–10: Connecting to the Supervisor Port Connector

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

INSERTING MMP CONNECTOR

SN−036−91

5–12 Hardware Installation

Figure 5–11: Connecting to the Terminal

INSERTING MMP CONNECTOR

SN−037−91

Hardware Installation 5–13

Figure 5–12: Connecting to 25-Pin D-type Connector Terminal

1. INSERT THE H8571−A ADAPTER

2. TIGHTEN THE SCREWS
3. INSERT THE MMP
SN−038−91

5.6 Connecting Synchronous Link Cables
Up to eight synchronous link cables may be connected to the MUXserver 380 to provide
connection to up to eight DECmux 300s which can include:
•

•

Up to eight distant DECmux 300s, via synchronous modems, using:
*

The MUXserver 380’s two dedicated 50-pin connectors (A and B), or

Any of the MUXserver 380’s six 25-pin connectors (C to H).

Up to two DECmux 300s that are co-located with the MUXserver 380, using the
MUXserver 380’s two dedicated 50-pin connectors (A and B).

5.6.1 Connecting a Modem to a 50-Pin Connector
One or both of the MUXserver 380’s two 50-pin connectors can be connected to synchronous
modems using the adaptor cables and extension cables listed in Table 5–2.

5–14 Hardware Installation

Table 5–2: Synchronous Link Adaptor and Extension Cables
Interface

Adapter
Cable

Extension
Cable

Interfacing
Connector

V.24/V.28/EIA-232-D

BS19D-02

BC22F-xx

25-pin male D-type

V.35

BC19F-02

BC19L-xx

34-pin male square

RS-449/RS-423-A

BC19E-02

BC55D-xx

37-pin male D-type

RS-449/RS-422-A

BC19B-02

BC55D-xx

37-pin male D-type

X.21

BC19C-02

BC22Z

15-pin male D-type

X.21/Data-Leads Only

BC22X-02

BC22Z-xx

15-pin male D-type

For each of the two 50-pin connectors which is to be connected to a synchronous modem:
1. Connect the 50-pin female D-type connector of the adaptor cable to the 50-pin male D-type
connector on the MUXserver 380, as shown in Figure 5–13.
2. Connect the extension cable to the adaptor cable, as shown in Figure 5–14.
Connect a V24/EIA-232-D adaptor (Order Code 12-27591-01) between the adaptor cable
and the extension cable as shown in Figure 5–15 if the synchronous modem implements
either:
•

A signal with a DCE source on pin 18,

•

Signal quality on pin 21, or

•

Data Signal Rate Selector (DCE) on pin 23.

If you are unsure of the signals involved, contact Digital Service.
3. Connect the extension cable to the modem.

Hardware Installation 5–15

Figure 5–13: Connecting to the 50-Pin D-Type Connector

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

1. INSERT THE 50−PIN D−CONNECTOR

2. TIGHTEN THE SCREWS

SN−029−91

Figure 5–14: Connecting the Adaptor Cable and Extension Cable

ADAPTER CABLE

EXTENSION CABLE

SN−030−91

5–16 Hardware Installation

Figure 5–15: Connecting a V24/EIA-232-D Adaptor

V24/RS232−C ADAPTER
(12−27591−01)
ADAPTER CABLE

EXTENSION CABLE

SN−032−91

5.6.2 Connecting a Co-located DECmux 300
Either or both of the MUXserver 380’s two 50-pin connectors can be connected to a co-located
DECmux 300 using a BC19Y-10 RS-422-A/Null Modem adaptor cable.
For each connector which is to be connected to a co-located DECmux 300:
1. Connect one 50-pin female D-type connector of the BC19Y-10 adaptor cable to the 50-pin
male D-type connector on the MUXserver 380, as shown in Figure 5–13.
2. Connect the other 50-pin female D-type connector of the BC19Y-10 adaptor cable to the
DECmux 300.

5.6.3 Connecting a Modem to a 25-Pin Connector
Any number of the MUXserver 380’s six 25-pin connectors can be connected to a synchronous
modem that is compatible with V.24/V.28/EIA-232-D. The connection is made with a BC22F-xx
extension cable.
For each of the 25-pin connectors which is to be connected to a synchronous modem:
1. Connect the 25-pin female D-type connector of the BC22F-xx extension cable to the
adaptor cable, as shown in Figure 5–16.
2. Connect a V24/EIA-232-D adaptor (Order Code 12-27591-01) between the extension cable
and the MUXserver 380 as shown in Figure 5–17 if the synchronous modem implements
either:
•

A signal with a DCE source on pin 18,

•

Signal quality on pin 21, or

•

Data Signal Rate Selector (DCE) on pin 23.
Hardware Installation 5–17

If you are unsure of the signals involved, contact Digital Service.
3. Connect the extension cable to the modem.
Figure 5–16: Connecting a BC22F-xx Extension Cable to the MUXserver 380

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

1. INSERT THE 25−PIN D−CONNECTOR

2. TIGHTEN THE SCREWS

SN−026−91

5–18 Hardware Installation

Figure 5–17: Connecting the V24/EIA-232-D Adaptor
1. INSERT THE CABLE

2. TIGHTEN THE SCREWS
SN−028−91

5.7 Connecting Power
Before connecting power to the MUXserver 380:
1. Check that the transceiver cables, the console terminal cables and the synchronous link
cables are connected correctly and securely.
2. Check that the console terminal has been set up with the correct parameters.
3. Check that the synchronous modem(s) have been switched on and set up with the
appropriate operating parameters. In particular, each synchronous modem must be set
up to provide both transmit and receive clocks to the MUXserver 380.
4. Check with the system/network manager that the MUXserver 380 software installation
and configuration have been completed. For example, check that the distribution software
has been installed on the load host(s) and the MUXserver 380 has been configured in the
load host database.
To connect power to the MUXserver 380:
1. Insert the power cable into the power cable receptacle as shown in Figure 5–18, and
2. Insert the power plug into a power outlet and, if necessary, switch the outlet on.
Check that one of the green Ethernet LEDs is illuminated. If neither is illuminated, refer to
Chapter 6.

Hardware Installation 5–19

Figure 5–18: Connecting Power to the MUXserver 380

C/4

D/5

E/6

F/7

E/8

H/9 MUXserver 380

SN−022−91

5.8 Running Self-Test
Applying power to the MUXserver 380 starts the unit’s self-tests described in Section 5.3.4.
When the unit passes self-test:
1. The 7-segment display will display "4" and then "2", indicating that the MUXserver 380
is loading its software image from the load host.
2. When the software image has been successfully down-line loaded and is executing, the
display will show a continuously rotating segment.

5.9 Installation Completion
Record the following information in the spaces provided on the MUXserver 380 Network
Identification Card which was included in the MUXserver 380 carton:
•

The unit’s serial number and Ethernet address (recorded on the back of the unit).

•

The location of the MUXserver 380, such as an office location, building number, or floor.

•

The Network’s DECnet Node Name and DECnet address, if known.

•

Your name and the date of installation.

Forward the completed Network Identification Card to the network manager.

5–20 Hardware Installation

Chapter 6
Installation Difficulties
Problems that may be encountered during MUXserver 380 hardware installation should be
investigated, in the first instance, by interpreting:
•

Information displayed by the 7-segment display, and

•

Error messages displayed on a terminal connected to Supervisor port.

This chapter describes the various indications which might appear, and suggests appropriate
corrective action.
After diagnosing and correcting a problem, continue with the installation described in
Chapter 5 - repeating the particular installation step if necessary. If a problem cannot be
rectified using the guidelines in this chapter, seek assistance from the system or network
manager.
Only hardware-related problems are described in this chapter. For assistance with softwarerelated problems, refer to:
•

The MUXserver 320/380 Software Installation Guide (ULTRIX) or the MUXserver 320
/380 Software Installation Guide (VMS), or

•

The MUXserver 320/380 Network Reference Manual.

6.1 The 7-Segment Display
The 7-segment display, located on the MUXserver 380’s rear panel, indicates the unit’s status
during its initialization, self-test and operation.
Table 6–1 summarises the conditions which are indicated on the 7-segment display (a complete
list of the 7-segment display codes is contained in Table 5–1). For further information on each
type of fault, and for suggested corrective action, refer to the section of this chapter shown in
Table 6–1.

Installation Difficulties 6–1

Table 6–1: 7-Segment Display Indications
Element

State

Indication

Refer to Section

Diagnostic dot

Self-test passed

Off

Fatal error detected or self-test
in progress

6.1.1

Blinking

Nonfatal error detected

6.1.2

Off

No power applied

6.1.3

"3"

Load request backoff

6.1.4

Flashing

Fatal error

6.1.5

Rotating
segment

MUXserver 380 software
executing

Alphanumeric
character

6.1.1 Diagnostic Dot Off
Probable Cause:
There is probably a fault in the MUXserver 380.
Corrective Action:
1. Arrange for the MUXserver 380 to be replaced (see Section 1.7), and then
2. Repeat the installation described in this manual.

6.1.2 Diagnostic Dot Blinking
The diagnostic dot blinking after power indicates that a a nonfatal MUXserver 380 problem
has been detected during self-test. To isolate the problem:
•

If one is not already connected, connect a terminal to the MUXserver 380’s Supervisor
port, and

•

Refer to Section 6.2 for information on the displayed error message(s).

6.1.3 7-Segment Display Off and Green Ethernet LED OFF
Probable Cause:
Power is not reaching the MUXserver 380 hardware.
Corrective Action:
1. Ensure that the voltage select switch is set correctly.
2. Check that power is available at the power outlet
3. Secure the power cable at the MUXserver 380 and at the wall outlet and check the fuse
in the power cable plug (if applicable).
4. If the MUXserver 380’s circuit breaker has tripped, reset it once only.
6–2 Installation Difficulties

If the circuit breaker trips again:
•

Do not reset the circuit breaker again,

•

Arrange for the MUXserver 380 to be replaced, (see Section 1.7), and then

•

Repeat the installation described in this manual.

6.1.4 7-Segment Display Shows "3"
If the 7-segment display shows "3" after power up, the MUXserver 380 might have a down-line
loading problem. To isolate the problem:
•

If one is not already connected, connect a terminal to the MUXserver 380’s Supervisor
port, and

•

Refer to Sections Section 6.3 to interpret the displayed error message(s).

6.1.5 7-Segment Display Flashing
The 7-segment dispaly flashing indicates that a fatal MUXserver 380 problem has been
detected during self-test. Refer to Table 5–1 to determine the likely cause of the problem.
The MUXserver 380 will probably need to be replaced (see Section 1.7).

6.2 Error Messages
If a terminal has been connected to the Console port connector, it will display MUXserver 380
Console messages.
Sections 6.2.1 to 6.2.6 describe the error messages that might be encountered during self-test
and recommended corrective action.

6.2.1 Error Message 1003
Init -1003- Enter ^P to repeat self-test or ^B to enter BCP

Probable Cause:
None of the ports which are enabled to down-line load the MUXserver 380 software have
passed self-test.
Corrective Action:
The MUXserver 380 displays this error message with error message 1007 (see Section 6.2.2)
or error message 1008 (see Section 6.2.3). Refer to these error messages for the correct action.

6.2.2 Error Message 1007
Init -1007- Line x, Error detected by self-test

Probable Cause:
The specified port has failed self-test.

Installation Difficulties 6–3

Corrective Action:
There is no corrective procedure for this condition. Notify the network manager that
the MUXserver 380 must be returned to Digital Equipment Corporation for repair or for
replacement (see Section 1.7).

6.2.3 Error Message 1008
Init -1008- NI External Loopback error detected by self-test

Probable Cause:
The Ethernet port has failed self-test.
Corrective Action:
Test the hardware again as shown in Section 5.3. If this fails to correct the problem,
notify the network manager that the MUXserver 380 must be returned to Digital Equipment
Corporation for repair or for replacement (see Section 1.7).

6.2.4 Error Message 1010
Init -1010- Parameter checksum error detected in EEPROM

Probable Cause:
Self-test has detected a checksum error in the permanent parameters stored in EEPROM.
Corrective Action:
Reset the MUXserver 380 to factory settings (see Table 1–1). If this fails to correct the
problem, notify the network manager that the MUXserver 380 must be returned to Digital
Equipment Corporation for repair or for replacement (see Section 1.7).

6.2.5 Error Message 1011
Init -1011- Console port error detected in executing Self-test

Probable Cause:
Self-test has detected an error on the Supervisor port.
Corrective Action:
There is no corrective procedure for this condition. Notify the network manager that
the MUXserver 380 must be returned to Digital Equipment Corporation for repair or for
replacement (see Section 1.7).

6–4 Installation Difficulties

6.2.6 Error Message 1012
Init -1012- Line x, Modem signal error detected by Self-test

Probable Cause:
The specified port (line) has failed the modem signal test routine in self-test.
Corrective Action:
There is no corrective procedure for this condition.
Notify the network manager that the MUXserver 380 must be returned to Digital Equipment
Corporation for repair or for replacement (see Section 1.7).

6.3 Down-Line Load Problems
If a terminal has been connected to the Console port connector, it will display MUXserver 380
Console messages.
Sections 6.3.1 and 6.3.2 describe the messages that might be encountered during down-line
loading.

6.3.1 Down-Line Load Starts, Then Fails
The following sequences of messages are displayed on the console terminal at various time
intervals:
Init -1101- Attempting to locate load host, (ISO8802)
Init -1101- Attempting to locate load host, (ETHERNET)
Init -1100- Requesting load from host xx-xx-xx-xx-xx-xx
Init -1102- Load failure, timeout

Probable Cause:
The load host has failed to complete the down-line load to the MUXserver 380.
Corrective Action:
Notify the network manager, reporting the error message exactly as it appears on the console
terminal.

6.3.2 Down-Line Load Does Not Start
The following sequences of messages are displayed on the console terminal at various time
intervals:
Init -1101- Attempting to locate load host, (ISO8802)
Init -1101- Attempting to locate load host, (ETHERNET)
Init -1103- Router will retry operation in n seconds

Installation Difficulties 6–5

Probable Cause:
The load host(s) not responding to the MUXserver 380’s down-line load request within the
allotted timeout period.
Corrective Action:
Notify the network manager, reporting the error message exactly as it appears on the console
terminal.

6–6 Installation Difficulties

Appendix A
Connector Pin Descriptions
This appendix describes the pins of the MUXserver 380 hardware connectors and the
cables used to interface to the MUXserver 380 hardware, including the Ethernet transceiver
interface, the device port connectors, and the supervisor port connector.

A.1 Ethernet Transceiver Interface
The MUXserver 380 has a ThinWire Ethernet connector and a standard Ethernet connector:
•

The ThinWire Ethernet connector is a 50 ohm, RG58 type, BNC connector with one pin
and a shield.

•

The standard Ethernet transceiver interface matches the signal specifications described in
The Ethernet: A Local Area Network: Data Link Layer and Physical Layer Specification.
Table A–1 lists the signals for the standard Ethernet connector pins.

Table A–1: Standard Ethernet Transceiver Interface Pin Description
Pin

Signal Name

Shield

Collision presence

Collision presence +

Transmit

Transmit +

Reserved

Receive

Receive +

+12 Volt Power

+12 Volt Power return

Reserved

Connector Pin Descriptions A–1

A.2 25-Pin D-Type Connectors
Use the 25-pin D-type connectors (links C to H) to connect devices that support EIA-232-D
/V.24/V.28. Table A–2 describes the signals on each pin.
Table A–2: 25-Pin D-Type Connector Pin Description
Pin

Signal Description

Signal Name

EIA-232-D

V.24

Transmitted data

TXD

103

Received data

RXD

104

Request to send

RTS

105

Ready for sending

CTS

106

Data set ready

DSR

107

Signal ground

GND

102

Data channel received line
signal detector

109

Data signal rate selector
(DCE)

SMI

112

Transmitter signal
element timing (DCE)

TXCLK

114

Receiver signal element
timing (DCE)

RXCLK

115

Local Loopback

LOC LPBK

141

Data terminal ready

DTR

108/2

Remote loopback

REM LPBK

140

Ring Indicator

125

Data signal rate selector
(DTE)

DSRS

111

Transmitter signal
element timing (DTE)

CLK

113

Test Indicate

TEST IND

142

A–2 Connector Pin Descriptions

A.3 50-Pin D-Type Connectors
Use the 50-pin D-type connectors (links A and B) to connect devices that support any of the
following standards:
•

EIA-232-D/V.24/V.28

•

RS-449/RS-423-A/V.10

•

RS-449/RS-422-A/V.11 (V.36)

•

V.35

•

X.21 data leads only

Table A–3 describes the signals on each pin.
Table A–3: 50-Pin D-Type Connector Pin Description
Pin

Signal Description

Name

EIA-232-D

Code Gnd

Code 0 *

Code 1 *

Code 2 *

Code 3 *

Transmitted data A

Transmitted data B

Transmitted data

Request to send A

Request to send B

104

Received data A

earth

Received data B

141

Local Loop

112

Data signal rate selector
(DCE)

142

Test indicator

140

Remote loopback

125

Ring indicator

115

Receiver signal element
timing (DCE) A

earth

Receiver signal element
timing (DCE) B

114

V.24

103

RS-423

RS-422

V.35

SD
RS

Connector Pin Descriptions A–3

Table A–3 (Cont.): 50-Pin D-Type Connector Pin Description
Pin

Signal Description

Name

EIA-232-D

V.24

RS-423

RS-422

Transmit signal element
timing (DCE) A

earth

Transmit signal element
timing (DCE) B

113

Transmit signal element
timing (DTE)

V35 Transmit signal
element timing (DCE) A

114

V35 Transmit signal
element timing (DCE) B

114

V35 Transmit signal
element timing (DTE) A

113

V35 Transmit signal
element timing (DTE) B

113

V35 RXD A

104

V35 RXD B

104

V35 TXD A

103

V35 TXD B

103

V35 Receiver signal
element timing (DCE) A

115

V35 Receiver signal
element timing (DCE) B

115

Data terminal ready

108/2 TR

Data set ready A

107 DM

earth

Data set ready B

earth

earth DM

105

Ready to send

105 RS

Data channel received
line signal detector A

DCD A

109

Data channel received
line signal detector B

DCD B

earth

Ready for sending A

CTS A

106

Ready for sending B

CTS B

earth

DCE ground

DCE GND

earth

Test transmit data

TEST TXD

A–4 Connector Pin Descriptions

V.35

107

Table A–3 (Cont.): 50-Pin D-Type Connector Pin Description
Pin

Signal Description

Name

EIA-232-D

V.24

RS-423

RS-422

V.35

Test RTS

TEST RTS

DTE ground

DTE GND

102

Data terminal ready A

DTR A

Data terminal ready B

DTR B

Terminal Timing A

CLOCK A

Terminal Timing B

CLOCK B

Test transmit clock

TEST
TXCLK

Data signal rate selector

DSRS

111

Code <0:3> identifies the adaptor cable that is attached to the 50-pin connector.

These three pins are used for testing.

A.4 Supervisor Port Connector
The Supervisor port connector on the MUXserver 380 hardware is a modified modular jack
(MMJ). Table A–4 lists the signals on the pins.
Table A–4: Pin Descriptions for Serial Communication Interface
Pin

Signal Description

Tied to VCC via 150 ohm resistor

Txdata

Txcommon

Rxcommon

Rxdata

Tied to ground via 3K ohm resistor

Connector Pin Descriptions A–5

A–6 Connector Pin Descriptions

Appendix B
Ordering Information
B.1 Products in the MUXserver 380 Network
The MUXserver 380 product family consists of two variants of the MUXserver 380 and eight
variants of the DECmux 300 which are listed in Table B–1.
Table B–1: MUXserver 380 Product Family
Product No

Major Features

Supply Voltage

Country Kit

MUXserver 380 Remote Terminal Server
DSRZD–AA

Standard features

100 to 120Vac

Not required

DSRZD–AB

Standard features

200 to 240Vac

Country Kit ordered separately

DECmux 300 Remote Terminal Multiplexer
DM308–AA

8 EIA–232–D ports

100 to 120Vac

Not required

DM308–AB

8 EIA–232–D ports

200 to 240Vac

Country Kit ordered separately

DM316–AA

16 EIA–232–D ports

100 to 120Vac

Not required

DM316–AB

16 EIA–232–D ports

200 to 240Vac

Country Kit ordered separately

DM316–BA

16 DEC423 lines
2 Type III ports

100 to 120Vac

Not required

DM316–BB

16 DEC423 lines
2 Type III ports

200 to 240Vac

Country Kit ordered separately

DM332–BA

32 DEC423 lines
4 Type III ports

100 to 120Vac

Not required

DM332–BB

32 DEC423 lines
4 Type III ports

200 to 240Vac

Country kit ordered separately

Ordering Information B–1

Table B–1 (Cont.): MUXserver 380 Product Family
Product No

Major Features

Supply Voltage

Country Kit

DECmux 300 Upgrade Kits
CK–DM308–A7

8 line EIA–232–D
upgrade kit

Not applicable

CK–DM316–W7

16 line DEC423
upgrade kit

Not applicable

B.2 Country Kits
The following country kits contain one power cable suitable for the appropriate country. Note
that the DSRZD-AA MUXserver 380 option includes a US/CANADA power cable and does
not require a separate country kit.
Description

Order Code

Australia

DM300-KZ

Austria

DM300-KA

Belgium

DM300-MA

Denmark

DM300-KD

Finland

DM300-MA

France

DM300-MA

Germany

DM300-KG

Italy

DM300-KI

India

DM300-LJ

Israel

DM300-KT

Japan

DM300-KJ

Netherlands

DM300-MA

New Zealand

DM300-KZ

Portugal

DM300-MB

Spain

DM300-MA

Sweden

DM300-MA

Switzerland

DM300-MB

United Kingdom

DM300-KE

B–2 Ordering Information

B.3 MUXserver 380 Accessories
The optional wall mounting kit is:
Description

Order Code

Wall mounting bracket kit

H041-AC

B.4 MUXserver 380 Software Distribution Kits
The available MUXserver 380 software distribution kits include:
Description

Media

Order Code

VMS Distribution Kit

Magnetic Tape

QA-YWLAA-BM

VMS Distribution Kit

TK50

QA-YWLAA-H5

ULTRIX Distribution Kit

Magnetic Tape

QA-YWMAA-BM

ULTRIX Distribution Kit

TK50

QA-YWMAA-H5

These kits include the MUXserver 380 VMS or ULTRIX software documentation kits listed
in Sections B.6.1 and B.6.2, as appropriate.

B.5 Cables
Interconnecting cables which are suitable for connection to the MUXserver 380 are described
in the Telecommunications and Networks Buyer’s Guide.

B.6 Documentation
This section provides the information required to order additional documents.

B.6.1 VMS Software Documentation Kit
The MUXserver 380 VMS documentation kit order code is QA-YWLAA-GZ. The kit contains
one of each of:
Title

Order Code

MUXserver 320/380 Software Installation Guide (VMS)

AA-PESDA-TE

MUXserver 320/380 Network Reference Manual

AA-PESEA-TE

MUXserver 300/320/380 User’s Reference Card

AV-PP95A-TE

MUXserver 320/380 Software Product Description

AA-PESGA-TE

MUXserver 320/380 System Support Addendum

AA-PESHA-TE

Grey 2" Binder

99-07705-01

Ordering Information B–3

B.6.2 ULTRIX Software Documentation Kit
The MUXserver 380 ULTRIX documentation kit order code is QA-YWMAA-GZ. The kit
contains one of each of:
Title

Order Code

MUXserver 320/380 Software Installation Guide (ULTRIX)

AA-PEUUA-TE

MUXserver 320/380 Network Reference Manual

AA-PESEA-TE

MUXserver 300/320/380 User’s Reference Card

AV-PP95A-TE

MUXserver 320/380 Software Product Description

AA-PESGA-TE

MUXserver 320/380 System Support Addendum

AA-PESHA-TE

Grey 2" Binder

99-07705-01

B.6.3 Hardware Documents
The order codes for the hardware manuals are:
Title

Order Code

MUXserver 380 Hardware Installation Manual

EK-DSRZD-IM

MUXserver 320/380 Network Identification Card

EK-DSRZD-IC

B–4 Ordering Information

B.7 Ordering Procedures
Refer to the following table for ordering information:
Your Location

Call

Contact

(800) DIGITAL

Digital Equipment Corporation
PO Box CS2008
Nashua, New Hampshire 03061

Puerto Rico

809-754-7575

Local Digital subsidiary

Canada

800-267-6215

Digital Equipment of Canada
Attn: DECdirect Operations KAO 2/2
PO Box 13000
100 Herzberg Road
Kanata, Ontario K2K 2A6

International

Local Digital subsidiary or approved distributor

Ordering Information B–5

B–6 Ordering Information

Appendix C
Instructions For UK Installations
The instructions in this Appendix are intended for use with Digital Equipment Corporation’s
MUXserver 380 product in the United Kingdom, and meet the requirements of BABT/SITS
/89/43 Section 7.1.

C.1 Service Category Specifications
Table C–1 lists the specifications that are relevant to Service Categories 1 and 2.
Table C–1: Specifications for Service Categories
Service
Category

Interface
(CCITT

Specifications

PTO1

Speed

Recommend)

Physical

Electrical

(Kbps)

Hull

MCL

X.21bis

ISO 2110
BS 6223:
Part 1 1985

V.24/V.28/EIA-232-D
Cable:
BC19D-02 (2ft)
BC22F-10 (10ft)
BC22F-25 (25ft)
BC22F-35 (35ft)
BC22F-50 (50ft)

2.4
4.8
9.6
19.2

Yes
Yes
Yes

Yes
Yes
Yes
Yes

X.21bis

ISO 2593
BS 6223:
Part 4 1986

V.35
Cable:
BC18F-02 (2ft)
BC19L-25 (25ft)
BC19L-50 (50ft)

48
56
64

Yes
Yes

Yes

Yes
Yes
Yes

1 BT = British Telecommunications plc; Hull = Kingston Communications (Hull) plc; MCL = Mercury Communications Ltd

Instructions For UK Installations C–1

C.2 Direct Connection (BABT/SITS/89/43 Section 4.2)
The MUXserver 380 product is approved for direct connection to a particular digital circuit,
including interconnecting cables with mating connectors conforming to BS 6623 Part 1 and
Part 4.

C.3 Apparatus Between MUXserver 380 and Digital Circuit (PTT)
If any other apparatus, including cable or wiring, is to be connected between the MUXserver
380 and the point of connection to any particular digital circuit, then all the other apparatuses
shall conform as follows:
1. The overall transmission characteristics of all other apparatuses shall introduce no
material effect upon the electrical conditions presented to one another by an apparatus
and a digital circuit.
2. All the other apparatus shall comprise only:
•

Apparatus approved (such apparatuses may be subject to limitations on their use) for
the purpose of connection between the apparatus and a particular digital circuit.

•

Cable or wiring complying with the code of practice for installation of apparatuses
covered by the standard or other applicable requirements.

C.4 Safety Warning for UK Installations
The MUXserver 380 has a label regarding safety requirements of communications modules
installed in the United Kingdom. The label states:
SAFETY WARNING. See instructions for use . . . .
The following warning applies to the United Kingdom:
Caution
The port indicated by the safety label is not intended to provide electrical and
mechanical isolation to satisfy the requirements of BS 6301. Connect only apparatus
conforming to BS 6301 to the device ports, or apparatus that has previously been
evaluated against British Telecom Technical Guides 2 or 26 and given clearance to
attach. Other usage will invalidate any approval given to this apparatus.
Connecting apparatuses to which this warning applied, whether the ports are so
marked, may produce hazardous conditions on the network. Seek advice from a
competent engineer before making any such connection.

Products complying with the Oftel’s General Approval NS/G/23/J/1000003 may be connected
to the MUXserver 380 and need not carry the BS 6301 warning text or label. All products
supplied by Digital Equipment Corporation comply with the General Approval.

C–2 Instructions For UK Installations

GLOSSARY

This glossary defines terms used in the MUXserver 380 Hardware Installation Manual.
Asynchronous

Pertaining to a communication method in which each event occurs with no relation to a timing
signal. See also Synchronous.
DEC423

DEC423 is an interface standard developed by Digital Equipment Corporation. It is electrically compatible with EIA Standard EIA-423-A.
DECconnect

A proprietary office networking/communication system. It is based on active networking
equipment installed in a Satellite Equipment Room connected by radiating cables to wall
faceplates in each office. It can include:
•

Standard and ThinWire Ethernet connections,

•

DEC423 terminal wiring,

•

Twisted pair telephone connections, and

•

Coaxial cable video connections

DELNI

A local network interconnect product that provides eight separate network interfaces from a
single Ethernet transceiver tap.
DESTA

A ThinWire Ethernet transceiver for use with standard Ethernet controllers.
EIA

Electrical Industries Association. A US organization with functions similar to those of CCITT.

Glossary–1

EIA-232-D

EIA Registered Standard No 232-D.
It defines the connectors, cables and electrical characteristics for an asynchronous serial
communications interface between a computer and a modem. It is also widely applied to
interfaces between computers and other terminal equipment.
EEPROM

Electrically-Erasable Programmable Read-Only Memory. This is memory which can be read
from and written to but does not not lose its information when power is removed.
EPROM

Erasable Programmable Read-Only Memory. This is memory which can be easily read from
but but can only be erased and re-written with special equipment.
Ethernet

A Xerox trade mark for a type of local area network based on carrier-sense multiple access
/collision detection (CSMA/CD).
Ethernet Transceiver

A device which attaches to a standard Ethernet coaxial cable.
FCC

Federal Communication Commission.
IEC

International Electrotechnical Commission.
LAN

Local Area Network.
LED

Light Emitting Diode.
Link

A communication path between two stations in a MUXserver 380 network which provides
statistical multiplexing over a synchronous communication channel.
MMJ

Modified Modular Jack.
MMP

Modified Modular Plug.
MODEM

The word is a contraction of MOdulator DEModulator. A modem interfaces a terminal to a
transmission line. A modem is sometimes called a dataset.

Glossary–2

Network Manager

The person responsible for the day-to-day operation of a complete computer network which
includes, where appropriate, the MUXserver 380 Remote Terminal Network. This responsibility is often delegated to System Managers, Server Managers and selected Privileged Users.
Node

An intelligent device on a network.
Non-privileged User

An authorized terminal user who has been granted no special access or privileges.
Port

An endpoint on the MUXserver 380 network for user communications.
Privileged User

An authorized terminal user who has been granted special access or privileges by the System
Manager or Network Manager.
Repeater

A device on a network that relays data from one port to another.
Satellite Equipment Room

A centralized equipment area which is part of the DECconnect communications system.
Server

A hardware and/or software device which provides many users with access to a system.
Server Manager

The person responsible for the day-to-day operation of a particular terminal server, including
the DECmux 300 Remote Terminal MUltiplexer. Where appropriate, the Server Manager is
responsible to the relevant System Manager or Network Manager.
Session

A session occurs when a terminal user is connected to a service node and is provided a specified
service. The MUXserver 380 network allows each user to have up to four sessions in effect
at once, with one session being active and the others dormant.
Statistical Multiplexing

A multiplexing method in which each channel is allocated a variable portion of available
transmission time depending on the amount of data it has to transmit. This results in
optimum use of the available data transmission rate.
STATMUX

STATistical MUltipleXing.
Supervisor Port

A terminal port which allows the connection of a console terminal. On the MUXserver 380,
all system status and error messages are logged on the supervisor port.

Glossary–3

Synchronous

Pertaining to a communication method in which data bits are synchronized with a timing
signal. See also Asynchronous.
System Manager

The person responsible for the day-to-day operation and control of an individual computer
system.
Terminal

The generic name for computer peripheral devices that have keyboards and video screens or
printers.
Terminal Server

An active device, such as a MUXserver 380 network, used to attach to a host system through
a network.
ThinWire

A Digital Equipment Corporation trade mark used to describe its IEEE 802.3 compliant
Ethernet products used for local distribution of data communications.
ThinWire Ethernet

An IEEE 802.3 compliant Ethernet network composed of thin Ethernet cable as opposed to
standard Ethernet cable.
ThinWire Segment

A length of coaxial cable made up of one or more cable sections connected together with BNC
barrel connectors and BNC TEE connectors.
Transceiver

See Ethernet Transceiver.

Glossary–4

Index
25-pin connector, 1–6, 5–14, 5–17, A–1
50-pin connector, 5–14, 5–17, A–3
25-pin synchronous link, 2–2
50-pin synchronous link, 2–2
7-segment display, 1–5, 5–6, 5–7, 5–20, 6–1

Adaptor cable, 1–6, 1–12, 3–3, 5–15
Asynchronous
device, 4–3
port, 1–1
terminal, 1–7

C
Cable, 4–3
Cable length, 2–2
Circuit breaker, 1–5, 6–2
Console
connector, 1–6
message, 6–3
port, 2–2
terminal, 1–2, 5–19
Country kit, 1–12, 3–2, B–1

D
DECconnect, x, 5–3
DECconnect System Planning and Configuration
Guide, 4–2
DECmux 300, x, 1–1, 1–2, 2–1, 2–2, 4–3, 5–14,
5–17, B–1
DELNI, 1–6, 3–3, 4–3
DEMPR, 4–3, 5–9
Desk top mounting, 2–2
DESPR, 4–3, 5–9
DESTA, 1–6, 1–12, 3–3
Diagnostic dot, 5–6
Dimensions, 4–1

Down-line load, 6–5

E
EIA-232-D, 1–6, 1–7, 1–9, 4–4, 5–15, 5–17, A–2,
A–3
Environmental, 4–1
Error message, 6–3
Ethernet
connector, 1–6
LED, 1–5, 5–4, 5–5
loopback connector, 1–11, 3–1
selector switch, 1–5, 5–4, 5–9, 5–10
transceiver, 3–3, A–1
Extension cable, 1–12, 5–15

F
Fatal error, 5–8

L
Load host, 5–19, 5–20, 6–5
ULTRIX, 1–2
VMS, 1–2
Loopback connector
Ethernet, 1–11, 3–1
synchronous link, 1–11, 3–1

M
Modem, 1–6, 3–3, 4–3, 5–15

N
Network Identification Card, ix, 1–12, 2–3, 3–1,
5–20, B–4
Network Reference Manual, ix, 1–1, 1–10, 2–1,
2–3, 4–2, 6–1, B–3
Null modem, 1–6, 1–7, 1–9, 5–17

Index–1

Partition mounting, 5–1
Power
cable, 1–12, 5–5, 5–19, 6–2
supply, 4–2

Transceiver, 1–6, 4–3
Transceiver cable, 1–12, 4–3, 5–10

R
Rack mounting, 2–2, 3–3, 5–1
Rack mounting kit, 3–1
Reset button, 1–5
RS-422-A, 1–6, 1–7, 1–9, A–3
RS-423-A, 1–9, 4–4, 5–15, A–3
RS-449, 1–6, 1–9, 5–15
Run self-test, 2–2

S
Satellite equipment room, 5–3
Satellite link, 1–2
Self-test, 2–3, 5–6, 5–8, 5–20, 6–1, 6–3, 6–5
Software Installation Guide, ix, 1–10, 2–1, 2–3,
6–1, B–3, B–4
Software license, 1–12, 3–1
Supervisor port, 1–2, 1–7, 3–4, 5–12, 6–1, 6–4, A–5
Synchronous link, 1–1, 1–2, 1–6, 2–1, 5–14
Synchronous link loopback connector, 1–11, 3–1
Synchronous modem, 1–7, 2–2, 3–3, 5–15

Index–2

U
ULTRIX, B–3
ULTRIX load host, 1–2

V
V.24, 1–6, 1–9, 4–4, 5–15, 5–17, A–2, A–3
V.28, 1–6, 5–15
V.35, 1–6, 1–9, 4–4, 5–15, A–3
V.36, 1–9
VMS, B–3
VMS load host, 1–2
Voltage select switch, 1–5, 2–1, 3–2, 5–1, 6–2

W
Wall mounting, 2–2
bracket, 3–3
kit, 1–12, B–3

X
X.21, 1–9, 5–15
X.21 data leads only, 1–6