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EK-DELNX-IN-A01

February 1992

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Document:	Replacement DELNI Installation and Operating Information
Order Number:	EK-DELNX-IN
Revision:	A01
Pages:	54
Original Filename:

OCR Text

Replacement DELNI
Installation and Operating Information
Order Number: EK-DELNX-IN.A01
Revision Update Information:

Digital Equipment Corporation

This is a new manual.

February 1992
© Digital Equipment Corporation 1992. All rights reserved. Printed in U.S.A.
The reproduction of this material, in part or whole, is strictly prohibited. For copy information,
contact the Digital Education and Training Department, Digital Equipment Corporation, Maynard,
Massachusetts 01754.
The information in this document is subject to change without notice and should not be construed
as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no
responsibility for any errors that may appear in this document.
Restricted Rights: Use, duplication, or disclosure by the U.S. Government is subject to restrictions
as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause
at DFARS 252.227-7013.
FCC NOTICE: This equipment generates and uses radio frequency energy and if not installed
and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause
interference to radio and television reception. It has been type tested and found to comply with
the limits for a Class B computing device in accordance with specifications in Subpart J of Part
15 of FCC rules, which are designed to provide reasonable protection against such interference
in a residential installation. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause interference to radio or television, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
reorient the receiving antenna
relocate the computer with respect to the receiver
move the computer away from the receiver
plug the computer into a different outlet so that computer and receiver are on different branch
circuits.
If necessary, the user should consult the dealer or an experienced radio/television technician
for additional suggestions. The user may find the following booklet prepared by the Federal
Communications Commission helpful:
"How to Identify and Resolve Radio–TV Interference Problems."
This booklet is available from the US Government Printing Office, Washington, DC 20402, Stock
No. 004-000-00345-4.
The postpaid READER’S COMMENTS form in this document requests the user’s critical evaluation
to assist in preparing future documentation.
The following are trademarks of Digital Equipment Corporation:
DECdirect, DECnet, DELNI, DEUNA, PDP–11, VAX, VAX DOCUMENT, and the DIGITAL logo.

This document was prepared using VAX DOCUMENT, Version 2.0.

Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vii

1 Introduction
1.1
1.2
1.3
1.4
1.5
1.6

Replacement DELNI Background . . . . . . . . . . . . . . . . . . .
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DELNI Arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standalone and Connected Operation . . . . . . . . . . . . . . . .
General Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1
1–1
1–3
1–6
1–8
1–9

2 Tabletop Installation
2.1
2.2

Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Tabletop DELNI Unit . . . . . . . . . . . . . . . . .

2–1
2–3

3 Rackmount Installation
3.1
3.2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Rackmount DELNI Unit . . . . . . . . . . . . . . .

3–1
3–1

4 Troubleshooting
4.1
4.2
4.3
4.4
4.4.1
4.4.2
4.4.3
4.5

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Improper Local/Global Configuration . . . . . . . . . . . . . . . . .
Neither Local/Global LED Lights . . . . . . . . . . . . . . . . . . . .
Other Hardware Problems . . . . . . . . . . . . . . . . . . . . . . . . .
Is the Workstation at Fault? . . . . . . . . . . . . . . . . . . . .
Is the Cable at Fault? . . . . . . . . . . . . . . . . . . . . . . . . .
Is the DELNI Unit at Fault? . . . . . . . . . . . . . . . . . . . .
Software Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1
4–1
4–2
4–3
4–3
4–3
4–4
4–4

iii

5 Service Options
5.1
5.2
5.3
5.4
5.4.1
5.4.2
5.4.3

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Get Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repacking the DELNI Unit . . . . . . . . . . . . . . . . . . . . . . . .
Digital Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital On-Site Service . . . . . . . . . . . . . . . . . . . . . . . . .
Carry-In Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–1
5–1
5–2
5–2
5–2
5–2
5–2

A Etherjack Connection
A.1

Connecting Cables to an Etherjack Junction Box . . . . . . . .

A–1

B Ethernet Controller Cable Length Restrictions
Figures
1–1
1–2
1–3
1–4
1–5
1–6
1–7
2–1
2–2
2–3
2–4
2–5
2–6
2–7
3–1
3–2
3–3
3–4
3–5

DELNI Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DELNI LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cascaded DELNI Units . . . . . . . . . . . . . . . . . . . . . . . .
Wide Area Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standalone DELNI LAN Configuration . . . . . . . . . . . .
Two-Tier DELNI LAN Configuration . . . . . . . . . . . . . .
Connected DELNI LAN Configuration . . . . . . . . . . . . .
DELNI Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Cable Support and Ethernet
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable/Panel Connection . . . . . . . . . . . . . . . . . . . . . . . .
Cable Connector Latch . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Select 120 Vac . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Select 240 Vac . . . . . . . . . . . . . . . . . . . . . . . . .
Power Cable Connection . . . . . . . . . . . . . . . . . . . . . . .
Disconnecting the Power Cable . . . . . . . . . . . . . . . . . .
Disconnecting the Connectors . . . . . . . . . . . . . . . . . . .
Attaching the Rackmount Brackets . . . . . . . . . . . . . . .
Installing the Locknuts on the Rack . . . . . . . . . . . . . .
Attaching the DELNI Assembly to the Rack . . . . . . . .

1–2
1–3
1–4
1–5
1–6
1–7
1–8
2–2
2–4
2–5
2–6
2–8
2–9
2–10
3–2
3–3
3–4
3–5
3–6

3–6
4–1
A–1
A–2
A–3
A–4
A–5
A–6

Connecting the Power Cord on the Rackmount DELNI
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resetting the Circuit Breaker . . . . . . . . . . . . . . . . . . .
Removing the Etherjack Cover . . . . . . . . . . . . . . . . . . .
Network Cable Connection . . . . . . . . . . . . . . . . . . . . . .
Opening the Connector Latch . . . . . . . . . . . . . . . . . . .
Joining the Connectors . . . . . . . . . . . . . . . . . . . . . . . . .
Closing the Connector Latch . . . . . . . . . . . . . . . . . . . .
Installing the Clamps and Cover . . . . . . . . . . . . . . . . .

3–8
4–2
A–2
A–3
A–4
A–5
A–6
A–7

DELNI Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .

1–9

Tables
1–1

Preface
OVERVIEW
This manual is intended for use by customers and Digital Services personnel who
are installing, operating, and troubleshooting the replacement Digital Ethernet
Local Network Interconnect (DELNI) unit.
This manual consists of the following:
•

Chapter 1 provides an overview of the replacement DELNI unit.

•

Chapter 2 provides instructions for installing the replacement DELNI unit
on a tabletop.

•

Chapter 3 provides instructions for installing the replacement DELNI unit
in a standard 19-inch (48.26-centimeter) rack.

•

Chapter 4 provides information on identifying problems with the
replacement DELNI unit and how to fix these problems.

•

Chapter 5 provides information on the repair and support services that are
available from Digital Equipment Corporation.

•

Appendix A provides instructions for connecting cables to an Etherjack
junction box.

•

Appendix B provides cable length restrictions for the Ethernet controller.

RELATED DOCUMENTATION
For more information, refer to the Ethernet Installation Guide (EK-ETHER-IN)
and the appropriate Ethernet controller manuals.

vii

1
Introduction
1.1 Replacement DELNI Background
The replacement DELNI unit is designed to provide the same functionality as the
original DELNI unit. The replacement DELNI utilizes the newest technology
available to increase reliability while maintaining high-quality standards. The
metal box and removable plastic dress skins of the original DELNI have been
eliminated with the design of a new plastic box for the replacement DELNI.
This has eliminated the need to remove the plastic dress skins for a rackmount
configuration.

IMPORTANT
The information in this manual deals with the replacement DELNI only.
For ease of presentation, the replacement DELNI will be referred to as
the DELNI.

1.2 Overview
The DELNI (Digital Ethernet Local Network Interconnect) unit, shown in
Figure 1–1, is an electronic device that permits workstations (Ethernet devices)
to communicate by using the Ethernet network transmission system.
You do not need to know how Ethernet works to install the unit. You only need to
follow the instructions for your workstations and network system software.

Introduction 1–1

Introduction

Figure 1–1 DELNI Unit

Global
LED
Local/Global
Push Button
Voltage Selection
Switch

240 V

Local
Connectors
Global
Connector
Local LED

Circuit Breaker
Power
Connector
MKV-040000202-01-DGS

This unit can work with DECnet or other Ethernet communication software.
Under the Ethernet system, workstations communicate (without interfering with
each other) by using a single coaxial cable. The network system is divided into
levels of hardware and software with each level more technically sophisticated
than the previous level. The DELNI unit is part of the lowest level (the physical
level) of the Ethernet system; it has no adjustments.

1–2 Introduction

Introduction

1.3 DELNI Arrangements
You can connect up to eight workstations to a DELNI group called a standalone
DELNI LAN (Local Area Network) (see Figure 1–2).
Figure 1–2 DELNI LAN

Standalone (Local)
DELNI LAN
1

Workstation

MKV-040000202-02-DGS

Introduction 1–3

Introduction

If workstations in different DELNI LANs need to exchange information, you can
connect DELNI units to each other as shown in Figure 1–3. One unit can connect
to eight other DELNI LANs, which allows many stations to communicate with
each other. You can still connect workstations to any of the eight DELNI device
connectors.
Figure 1–3 Cascaded DELNI Units

Workstation
Two-Tier
DELNI LAN

MKV-040000202-03-DGS

1–4 Introduction

Introduction

If you plan to have a large Ethernet system that connects many workstations
or covers a wide area, you can connect DELNI LANs to the Ethernet system
by using an Etherjack junction box, or by attaching the DELNI LANs directly
to an Ethernet network transceiver (see Figure 1–4). Refer to Appendix A for
information on connecting to these devices.
Figure 1–4 Wide Area Ethernet

Ethernet Coaxial Cable
Connected (Global)
DELNI LAN
1

Workstation

Etherjack
7

Workstation
MKV-040000202-04-DGS

Introduction 1–5

Introduction

1.4 Standalone and Connected Operation
If you use either the two-tier or connected arrangement, you have to use the
ninth connector. Next to this connector there are two LEDs and a two-position
push button that disconnects the DELNI LAN from the larger system. This
disconnection makes this DELNI LAN a standalone (local) arrangement when the
green LED next to the
symbol is lit. There is no effect on the DELNI LAN or
the larger network. You can reconnect the standalone DELNI LAN to the larger
network at any time by pushing the push button until the green LED next to the
symbol is lit. Figure 1–5 shows a standalone configuration, Figure 1–6 shows
a two-tier configuration, and Figure 1–7 shows a connected configuration.
You can add or remove workstations at any time, in either mode, without
disturbing the network.
Figure 1–5 Standalone DELNI LAN Configuration

Local/Global
Push Button

Standalone (Local)
DELNI LAN
1

Workstation

MKV-040000202-05-DGS

1–6 Introduction

Introduction

Figure 1–6 Two-Tier DELNI LAN Configuration

Local/Global
Push Button

Workstation

Two-Tier
DELNI LAN

Local/Global
Push Button

MKV-040000202-06-DGS

Introduction 1–7

Introduction

Figure 1–7 Connected DELNI LAN Configuration

Ethernet Coaxial Cable

Connected (Global)
DELNI LAN
1

Local/Global
Push Button
Workstation

Workstation

MKV-040000202-07-DGS

1.5 General Installation
Chapter 2 explains how to install the DELNI unit on a tabletop. Chapter 3
explains how to mount the DELNI unit in a 19-inch (48.26-centimeter) rack.
Before you install your unit, plan your arrangements. You need to know how
long connecting cables can be so that you can better plan where to place the
unit. For this information, refer to the manuals that come with the Ethernet
controller modules for the workstations you want to connect. Refer to Appendix A
for information on connecting to an Etherjack junction box and Ethernet network
transceiver. Refer to Appendix B for information on Ethernet cable length
restrictions.
Ensure that all the workstations are working correctly by running diagnostic
tools on the workstations before you connect them to the unit.

1–8 Introduction

Introduction

1.6 Specifications
Refer to Table 1–1 for a list of the DELNI specifications.
Table 1–1 DELNI Specifications
Parameter

Value

Dimensions

8.26 cm (3.25 in) high (including feet)
44.5 cm (17.5 in) wide
17.8 cm (7.0 in) deep

Weight

2.6 kg (5.5 lb)

Connectors

8 (to workstations)
15-pin male D-connector
1 (to transceiver or DELNI unit)
15-pin female D-connector
1 (ac power)
3-conductor grounded

Electrical
120 Vac

90 V to 128 V

240 Vac

180 V to 256 V

Frequency

47 to 63 Hz

Power

15 W (maximum)

Circuit breaker

Data transfer rate

10 Mb/second

Operating temperature range

5°C (41°F) to 50°C (122°F)

Introduction 1–9

2
Tabletop Installation
2.1 Before You Start
First, ensure that all the workstations you plan to connect work correctly. Next,
install the Ethernet controllers and then your workstation cables.
Cables are available with either straight or right-angle connectors. If you mount
your unit on a tabletop, use straight connectors. If you rackmount your unit, use
right-angle connectors.
NOTE
Check for any cable length restrictions by referring to the appropriate
installation manual for each station’s Ethernet controller and Appendix B
of this document. Refer to the Ethernet Installation Guide for more
information.

NOTE
If you plan to connect the DELNI unit to another DELNI unit, an
Ethernet transceiver, or an Etherjack junction box, you must have a
separate cable (part number BNE3 or BNE4, ordered separately). Contact
your Digital sales office or DECdirect for more information.

Tabletop Installation 2–1

Tabletop Installation

1. Open the box and check the contents (see Figure 2–1). Save the box and
shipping material.
Figure 2–1 DELNI Parts

240 V

DELNI

AC Power Cable

Replacement DELNI
Installation and Operating
Information
10-32 Screws (4)
Locknuts (4)

Cable Support

6-32 Screws (4)

Rackmount (2)
Brackets
MKV-040000202-08-DGS

2–2 Tabletop Installation

Tabletop Installation

2. If there are any missing items:
•

Identify items

•

Contact your sales representative or delivery agent

3. If there is any damage:
•

Stop unpacking

•

Contact your sales representative and delivery agent

4. If you need help:
•

Call Digital at the phone number listed in Chapter 5.

2.2 Installing the Tabletop DELNI Unit
Place the DELNI unit in a convenient location.
•

Ensure that cables from the workstations can reach the unit.

•

Place the unit within 2 meters (6 feet) of the power source. Do not use an
extension cord.

•

Avoid dusty locations.

•

Avoid direct sunlight, heat vents, and warm air exhaust from other
equipment.

Tabletop Installation 2–3

Tabletop Installation

1. Install the cable support by inserting the ends of the cable support into the
holes provided on both sides of the DELNI unit (see Figure 2–2).
The DELNI unit is supplied with the cable support in order to provide
stabilization to the unit and its connecting cables in the tabletop installation.
With the cable support installed, as shown in Figure 2–2, the AUI cables can
be tie-wrapped to the bar. This gives the total unit a larger footprint and
helps prevent the unit from moving.

240 V

Figure 2–2 Connecting the Cable Support and Ethernet Cables

MKV-040000202-09-DGS

2–4 Tabletop Installation

Tabletop Installation

2. Find a workstation cable (it has a D-shaped connector).
3. Align the cable’s D-shaped connector with the D-shaped DELNI panel
connector (1—8) (see Figure 2–3).
4. Slide the cable connector latch up with your finger if the latch is not already
up (see Figure 2–3).
Figure 2–3 Cable/Panel Connection

Panel Connector
MKV-040000202-10-DGS

5. Slide the cable connector on any panel connector (1—8). Ensure that it is on
all the way.

Tabletop Installation 2–5

Tabletop Installation

6. Slide the cable connector latch down with your thumb (see Figure 2–4).
7. Gently pull the connector to ensure that it is on firmly.
Figure 2–4 Cable Connector Latch

240 V

To
Latch

MKV-040000202-11-DGS

2–6 Tabletop Installation

Tabletop Installation

NOTE
If you are connecting the cable to another DELNI unit or transceiver, use
connector 9 and follow these steps:
•

Push slide on panel connector up.

•

Push connector on.

•

Slide latch down.

•

Gently pull to ensure that the connector is on firmly.

8. Find another workstation cable and attach it to any other panel connector
(1—8) in the same way as was done for the first cable.
9. Attach the rest of the workstation cables in the same way. Ensure that you
neatly place the cables away from where people may walk. Tie-wrap each
cable separately to the cable support.
NOTE
You do not have to use all of the connectors. You can add other cables at
any time.

Tabletop Installation 2–7

Tabletop Installation

10. If your power line voltage is 90 Vac to 128 Vac, slide the voltage select switch
to 120 (see Figure 2–5).
Figure 2–5 Voltage Select 120 Vac

90 - 128 Volts

Voltage Selection Switch

240 V

120 V

(Power Cord)

MKV-040000202-12-DGS

2–8 Tabletop Installation

Tabletop Installation

11. If your power line voltage is 180 Vac to 256 Vac, slide the voltage select switch
to 240 (see Figure 2–6).
Figure 2–6 Voltage Select 240 Vac

International
180 - 256 Volts
(Power Cord)

240 V

Voltage Selection Switch

MKV-040000202-13-DGS

Tabletop Installation 2–9

Tabletop Installation

12. Insert the power cable in the socket on the DELNI panel (see Figure 2–7).
13. Plug the other end of the power cable into the wall socket (see Figure 2–7).

240 V

Figure 2–7 Power Cable Connection

MKV-040000202-14-DGS

One of the LEDs next to the local/global push button on the front of the unit
should now be on.
If either of the LEDs is lit, you have correctly installed your DELNI unit.
If neither of the LEDs next to the local/global push button is lit, check the
steps you performed in this chapter. If you performed all the steps correctly
and neither of the LEDs is lit, go to Chapter 4 for troubleshooting help.

2–10 Tabletop Installation

Tabletop Installation

14. Set the local/global LEDs for your type of installation as shown in Figure 1–5
through Figure 1–7.
Note the
symbol above connector 9. If you are using connector 9 on this
unit to connect to another DELNI unit, Etherjack junction box, or Ethernet
network transceiver, then press the push button until the green LED next to
symbol is lit. Otherwise, press the push button until the green LED
the
next to the
symbol is lit. Chapter 1 can also be referred to for information
about setting these LEDs.

Tabletop Installation 2–11

3
Rackmount Installation
3.1 Introduction
This chapter informs you on how to install the rackmount assembly for the
replacement DELNI (Digital Ethernet Local Network) unit. The assembly
fits in a standard 19-inch (48.26-centimeter) rack. The basic operating and
troubleshooting instructions for the replacement DELNI unit are in Chapter 2
and Chapter 4 of this manual.

3.2 Installing the Rackmount DELNI Unit
If your DELNI unit is connected and in use, begin with step 1. If you are
mounting and connecting your DELNI unit for the first time, read this manual
and then begin with step 3.

Rackmount Installation 3–1

Rackmount Installation

1. Remove the power cable from the power source and the DELNI panel
connector (see Figure 3–1).

240 V

Figure 3–1 Disconnecting the Power Cable

From Power Source

MKV-040000202-15-DGS

3–2 Rackmount Installation

Rackmount Installation

2. Remove all connectors from the DELNI panel (see Figure 3–2).

240 V

Figure 3–2 Disconnecting the Connectors

MKV-040000202-16-DGS

Rackmount Installation 3–3

Rackmount Installation

3. Attach the rackmount brackets to the DELNI unit with the four 6-32 X 5/16
inch screws (see Figure 3–3). Tighten firmly.
Figure 3–3 Attaching the Rackmount Brackets

240 V

MKV-040000202-17-DGS

3–4 Rackmount Installation

Rackmount Installation

4. Slide the four locknuts onto the rack (see Figure 3–4). Align the hole in the
rack with the hole in the nut.
Figure 3–4 Installing the Locknuts on the Rack

MKV-040000202-18-DGS

Rackmount Installation 3–5

Rackmount Installation

5. Attach the DELNI assembly to the rack with the four large 10-32 screws (see
Figure 3–5). Tighten firmly.

240 V

Figure 3–5 Attaching the DELNI Assembly to the Rack

MKV-040000202-19-DGS

3–6 Rackmount Installation

Rackmount Installation

6. Attach the workstation cables. Test the connections by pulling the connections
gently. See Chapter 2 (steps 2 through 9) for instructions.
7. Check the voltage select switch for the correct voltage setting. See Chapter 2
(steps 10 or 11) for instructions on how to set the voltage switch.
NOTE
You may need to order a different power cable to match the voltage and
power connector in your rack’s power supply.

Rackmount Installation 3–7

Rackmount Installation

8. Attach the power cable to the DELNI panel connector and then to the power
source (see Figure 3–6).

240 V

Figure 3–6 Connecting the Power Cord on the Rackmount DELNI Unit

To Power Source
MKV-040000202-20-DGS

9. Check to see if the correct local/global LED is lit. See Chapter 2 (step 14) for
instructions on how to set the local/global LED state.
You have completed the rackmount installation for your DELNI unit. See
Chapter 1 and Chapter 2 for further information about its operation and how
to use it.

3–8 Rackmount Installation

4
Troubleshooting
4.1 Introduction
This chapter explains how to identify problems in your DELNI unit and how to
perform some simple procedures to fix these problems. The DELNI unit contains
no user-serviceable parts and must be returned to Digital for any internal repair.

4.2 Improper Local/Global Configuration
If a user connects the DELNI unit in a local cluster with no backbone connection
or other transceiver connected to the global port, and then sets the unit to
global mode, the DELNI unit will not function. This is due to the fact that the
local/global push button changes the data path. In local mode, the data path is
directly from the transmit pair of the active port to the receive pairs of all eight
local ports. There is no logical connection to the transceiver port in this mode.
There will be +12 Vdc at the global connector, but no data.
In global mode, the transceiver becomes part of the data path. Therefore, if the
transceiver is missing or improperly terminated, the data path breaks down, and
units in a local cluster will not communicate through the DELNI unit.
In global mode, the transceiver is dependent upon the DELNI unit to provide
+12 Vdc power on connector 9. If the DELNI unit fails to produce +12 Vdc, the
network transceiver will not function. The green LEDs only indicate the presence
of +5 Vdc. If connector 9 is connected to another DELNI unit in a two-tier DELNI
LAN as in Figure 1–6, the loss of +12 Vdc will not be apparent as the upper tier
DELNI unit does not require the +12 Vdc. To verify the presence of +12 Vdc, an
Ethernet loopback connector (P/N 12-22196-02) can be placed on connector 9. If
the green LED on the loopback connector is not lit, the +12 Vdc supply in the
DELNI unit is at fault and the unit must be replaced.

Troubleshooting 4–1

Troubleshooting

4.3 Neither Local/Global LED Lights
If neither of the two LEDs on the front panel is lit, there may be a power fault.
First, ensure that there is power at the socket (try plugging a lamp into the
socket). Check the voltage selection switch as described in Chapter 2 and then
check the circuit breaker. If necessary, reset the circuit breaker by pushing in
the center button on the circuit breaker as shown in Figure 4–1. If both LEDs
remaim unlit, the unit must be replaced.

240 V

Figure 4–1 Resetting the Circuit Breaker

US H

MKV-040000202-21-DGS

4–2 Troubleshooting

Troubleshooting

4.4 Other Hardware Problems
If you have problems using the DELNI unit, the fault may be in the workstation,
the cable between the unit and the workstation, or the unit itself. First, run
any available diagnostics (refer to the workstation’s owner’s manual). Then, if
diagnostics do not locate the problem, continue troubleshooting. Troubleshooting
involves substituting working components, one by one, until you find the defective
component.

4.4.1 Is the Workstation at Fault?
Perform the following steps to check for a faulty workstation:
1. Substitute a workstation that you know works correctly for one that shows
the problem. Substitute only the workstation and not the connecting cable.
2. If the new workstation works correctly, the workstation you just removed is
faulty. Refer to that workstation’s owner’s manual for corrective action.
If the problem continues, the cable or unit is faulty.

4.4.2 Is the Cable at Fault?
Perform the following steps to check for a faulty cable:
1. Remove the connector for the cable between the unit and the workstation that
shows the problem.
2. Connect a cable that you know works correctly to this connector. You can use
a cable from another workstation.
3. Connect the other end of this cable to the same workstation that shows the
problem.
4. If the workstation works correctly, the cable you just removed is faulty.
Replace the defective cable.
If the problem continues, the unit is faulty.

Troubleshooting 4–3

Troubleshooting

4.4.3 Is the DELNI Unit at Fault?
If some of the DELNI panel connectors are not in use, and some of the connectors
in use are not working, connect working cables and workstations to the unused
connectors. The unused connectors may not be faulty. If different connectors
work, use these until you can arrange to have your unit serviced. If none of the
connectors work, perform the following test:
1. Disconnect all cables from the DELNI panel.
2. Substitute a unit that works correctly for one that shows the problem.
3. Connect all the cables to the working unit. If all workstations work correctly,
the original unit is faulty. Replace that unit and return it to Digital for repair.
If the problem continues, then start over again by troubleshooting the workstation
and the cables.

4.5 Software Problems
The DELNI unit does not depend on software to operate. If you do not have the
appropriate software for your workstation, however, you may have communication
problems.
Ensure that you have the latest version of Ethernet network software correctly
installed in your workstations. You may want to reload this software into all
appropriate workstations before you test again.

4–4 Troubleshooting

5
Service Options
5.1 Introduction
Chapter 4 described which steps you should follow before you call for service.
This chapter describes the repair and support services available from Digital.

5.2 How to Get Service
Digital has a central service point in your geographic area to help you get your
system running with a minimum of trouble.
If your DELNI unit is on warranty, or if you have a service contract, you can call
Digital for assistance.
Before you call:
•

Step through Chapter 4 in this book. Often you can solve a problem yourself.

•

Write down your DELNI serial number. The serial number is on the DELNI
unit.

•

Summarize the problem. Make a note of what you were doing when the unit
failed. Also note the steps you took and the cables and devices you switched
when troubleshooting.

Service Options 5–1

Service Options

When you call:
•

Be near the unit.

•

Have all your materials available. The service person may ask you to try and
recreate the problem.

Call Digital at the following telephone number:
United States
Call 1-(800)-554-3333

5.3 Repacking the DELNI Unit
If you have to return the unit to Digital for service, you must repack it carefully.
Use the original shipping carton and shipping material. If you do not have the
original shipping materials, pad the sides to prevent damage and to keep the unit
from moving in the carton.

5.4 Digital Services
Digital provides a wide range of DELNI maintenance and customer services.

5.4.1 Digital On-Site Service
Trained service specialists perform fast, low-cost maintenance at your site.
Digital provides on-site service under a service agreement or on a per-call basis.

5.4.2 Carry-In Service
There are 160 Servicenters worldwide, offering fast, dependable service. Digital
provides carry-in service under a service agreement or on a per-call basis. Call
the service information number listed above for the location of the Servicenter
near you.

5.4.3 Other Services
Digital also provides network planning services. These include site surveys,
installation, and consultations about your network installation. There are also
network maintenance agreements that can give you support for both Digital and
non-Digital equipment. Call your local sales office for complete information.

5–2 Service Options

A
Etherjack Connection
A.1 Connecting Cables to an Etherjack Junction Box
This appendix describes how to connect cables to an Etherjack junction box.
The Etherjack junction box is a connection point for two cables. You can use
it between two lengths of cable, or as the connecting point for a cable and
other network equipment. An H4005 transceiver is not usually accessible and,
therefore, has a cable connected to it. This cable is installed in the Etherjack
junction box for connection to other network equipment.
There may be restrictions on the total distance between equipment to be added
to an H4005 transceiver or a second DELNI unit. Check the installation manual
that came with your network equipment or the Ethernet controller for your
workstation. You may have to rearrange your equipment if it has restrictions.
Typically, the maximum distance you can have is 45 meters (147 feet, 8 inches),
although some workstations allow less. For example, the DEUNA Ethernet
controller for the PDP–11 or VAX systems cannot be more than 35 meters (114
feet, 10 inches) from a second DELNI unit or an H4005 transceiver. Contact
your local Digital sales office for more information about installing your network
system.
Each Etherjack junction box has a specifications label inside the cover. This label
lists the length of the cable that connects the Etherjack junction box to other
network equipment, DELNI unit, or H4005 transceiver. Ensure that you include
this length when you calculate the total cable length. Another label inside the
Etherjack cover shows several cable arrangements.

Etherjack Connection A–1

Etherjack Connection

Perform the following steps to connect cables to the Etherjack junction box:
1. Snap off the Etherjack cover (see Figure A–1).
a. Pry out one side.
b. Lift off the cover.
Figure A–1 Removing the Etherjack Cover

MKV-040000202-23-MPS

A–2 Etherjack Connection

Etherjack Connection

2. Bring the workstation or network hardware cable and connector to the
Etherjack junction box (see Figure A–2).
Figure A–2 Network Cable Connection

MKV-040000202-27-MPS

3. Align the connector on the cable to the connector in the Etherjack junction
box.

Etherjack Connection A–3

Etherjack Connection

4. With your finger, slide the cable connector latch to the open position (up), if
not already open (see Figure A–3).
Figure A–3 Opening the Connector Latch

MKV-040000202-22-MPS

A–4 Etherjack Connection

Etherjack Connection

5. Push the connectors together (see Figure A–4). You may have to loosen the
clamp that holds the connector in place.
Figure A–4 Joining the Connectors

MKV-040000202-25-MPS

Etherjack Connection A–5

Etherjack Connection

6. Slide the latch in the other direction (down) (see Figure A–5).
7. Pull the connectors firmly to ensure that they are attached.
8. Push the cable into the strain relief clip.
Figure A–5 Closing the Connector Latch

MKV-040000202-26-MPS

A–6 Etherjack Connection

Etherjack Connection

9. Attach the clamps that hold the connectors in place (see Figure A–6).
10. Snap the Etherjack cover into place (see Figure A–6).
Figure A–6 Installing the Clamps and Cover

MKV-040000202-24-MPS

Etherjack Connection A–7

B
Ethernet Controller Cable Length
Restrictions
The Ethernet controller has certain cable length restrictions.
The following are maximum lengths for the DELNI LAN arrangements.
Standalone (local) DELNI LAN

40 meters (131.24 feet) from Ethernet
controller to DELNI unit

Two-tier DELNI LAN

40 meters (131.24 feet) from Ethernet
controller to DELNI unit and 50 meters
(164.05 feet) from DELNI to DELNI unit

Connected (global) DELNI LAN

35 meters (114.84 feet) total length from
Ethernet controller to DELNI unit to H4005
transceiver

Ethernet Controller Cable Length Restrictions B–1