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Document:	DECserver 90L Owners Manual
Order Number:	EK-DSRVD-OM
Revision:	001
Pages:	66
Original Filename:

OCR Text

DECserver 90L Owner’s Manual
Order Number EK-DSRVD-OM-001

Digital Equipment Corporation

February 1991
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.
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 or its affiliated companies.
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.
Copyright © Digital Equipment Corporation 1991
All Rights Reserved.
Printed in U.S.A.
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 of Part 15 of FCC
Rules, which are designed to provide reasonable protection against such radio frequency
interference 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.
The following are trademarks of Digital Equipment Corporation: DEC, DECbridge,
DECconnect, DECnet, DECserver, Digital, VMS, LAT, VAX, and the DIGITAL logo.
This document was prepared and published by Educational Services Development and
Publishing, Digital Equipment Corporation.

Contents
About This Manual
1

Overview

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1
1–2

Installation

Standalone Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Backplane Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vii

2–1
2–5

Operation

Using a Terminal or Personal Computer . . . . . . . . . . . . . . . . . . . . .
Establishing a Terminal Session . . . . . . . . . . . . . . . . . . . . . . . . .
Ending a Terminal Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‘‘Last Number Redial’’ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interrupting a Terminal Session . . . . . . . . . . . . . . . . . . . . . . . . .
Resuming an Interrupted Terminal Session . . . . . . . . . . . . . . . . .
Disconnecting an Interrupted Terminal Session . . . . . . . . . . . . . .
Using a Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DECserver 90L Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DECserver 90L Information and Error Codes . . . . . . . . . . . . . . . . .

3–1
3–1
3–2
3–3
3–3
3–3
3–4
3–4
3–4
3–6

iii

iv Contents

Managing the DECserver 90L

Local Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Management Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Port Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Server Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing Password by Menu . . . . . . . . . . . . . . . . . . . . . . . . . .
Set and Clear Authorized Operation . . . . . . . . . . . . . . . . . . . .
Enable and Disable Manager Mode . . . . . . . . . . . . . . . . . . . . .
Show Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Show Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Show Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reset Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using a Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting

Specifications

Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector Pin Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LAT Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Related Documentation

Index

4–2
4–2
4–2
4–3
4–3
4–3
4–7
4–10
4–11
4–14
4–17
4–17
4–20
4–22
4–23
4–25

A–1
A–2
A–3
A–3
A–5

Contents v

Figures
1–1
1–2
2–1
2–2
2–3
A–1

Sample DECserver 90L Connection . . . . . . . . . . . . . . . . . . . .
DECserver 90L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DECserver 90L Standalone Installation . . . . . . . . . . . . . . . . .
Removing the Back Cover of the DECserver 90L . . . . . . . . . .
DECserver 90L Backplane Installation . . . . . . . . . . . . . . . . .
Port Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–2
1–4
2–2
2–3
2–6
A–4

Tables
1–1
3–1
3–2
4–1
4–2
4–3
5–1
A–1
A–2
A–3

Supported Terminal Characteristics . . . . . . . . . . . . . . . . . . . . 1–3
DECserver 90L User Commands . . . . . . . . . . . . . . . . . . . . . . 3–5
DECserver 90L Information and Error Codes . . . . . . . . . . . . 3–6
Port Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4
Server Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–8
Port Status Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–17
DECserver 90L Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 5–1
MMJ Pin Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–4
LAT Server Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . A–5
LAT Port Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–5

About This Manual
This guide gives an overview of the DECserver 90L and describes how to
install, operate, manage, and troubleshoot the DECserver 90L. This guide
also gives the specifications and related documentation for the DECserver
90L.

Organization
This guides has five chapters and two appendices.
Chapter

Meaning

Provides an overview of the DECserver 90L including
the features and a quick start procedure.

Describes how to install the DECserver 90L.

Describes how to start, interrupt, resume, and end a
terminal session.

Describes how to manage the DECserver 90L locally or
from a remote device on the network.

Describes how to troubleshoot the DECserver 90L.

Appendix A

Describes the physical dimensions; environmental,
electrical, and LAT specifications.

Appendix B

Provides a list of related documentation and how to
order information.

vii

viii About This Manual

Conventions
Convention

Meaning

italic

Indicates a new term or in command syntax examples, italic
words represent elements of a command for which you supply a
value. For example:
-> service

Return

Key names appear in a box.

NOTE

Provides general information.

bold text

Bold text represents user input. For example:
-> Set Return

[]

The characters in brackets [ ] do not need to be entered for the
DECserver 90L to recognize the command. For example:
D[ISCONNECT]

1
Overview
This chapter describes the features of the DECserver 90L and provides a
summary of the installation procedure.

Features
The DECserver 90L contains the following features:
•

Simplified human interface

•

Plug-and-go installation

•

Small in size

•

Rack mountable in DEChub
90 Ethernet backplane

•

Network Management
through MOP and TSM
(future release of TSM)

•

Eight ports
– 1.2K bits to 38.4K bits per second
– 8-bit characters
– One stop bit
– No parity

•

One session per port

•

Printer support, including queuing

•

LAT compatible, V5.0 or higher

The DECserver 90L terminal server is an eight line, single session per
line, terminal server that supports terminals and printers. Each line
or port can establish a connection to one computer or service at a time.
DECserver 90L supports Digital’s Local Area Transport (LAT) protocol
and is designed to work in a ThinWire Ethernet Local Area Network
(LAN), as shown in Figure 1–1.

1–1

1–2 Overview

TERMINAL

PERSONAL COMPUTER

TERMINAL

PRINTER

TERMINAL

DECserver 90L
TERMINAL SERVER
THINWIRE

COMPUTER 1

Figure 1–1

COMPUTER 2

ETHERNET

COMPUTER 3

COMPUTER N

Sample DECserver 90L Connection

Quick Start
To install and begin using your DECserver 90L is simple. It does not
require any programming or other assistance from system management.
After unpacking the unit:
1. Plug the power supply in a working AC outlet and plug the power
connector from the power supply in to your DECserver 90L.
The green power LED turns on to indicate DC power is getting to the
unit. The green self-test turns on to indicate that the unit successfully
completed its internal self-test. The self-test takes approximately five
seconds to complete.
2. Connect the unit to a properly terminated ThinWire Ethernet.
The green network LED turns on to indicate a good connection.

Overview 1–3

3. Connect a working terminal to one of the terminal ports. Refer to
Table 1–1 for supported terminal characteristics.
4. Turn the power on to the terminal and press Return twice to get the
DECserver 90L prompt (->).
Pressing Return twice causes the green activity LED to blink and
automatically sets the port’s baud rate.
5. Enter the name of the network node you want to connect to and press
Return . The DECserver 90L will display a string of dots ‘‘.....’’, one per
second, until the connection is made.
For more detailed information on installing and using the DECserver 90L
refer to Chapter 2, Installation and Chapter 3, Operation of this manual.
Table 1–1 Supported Terminal Characteristics
Characteristic

Setting

Transmit speed

1200 to 38.4K

Receive speed

Receive = Transmit

Flow control

XON/XOFF

Data and parity

8 Bits, No Parity

Stop bits

Figure 1–2 shows the DECserver 90L and calls out its features.

1–4 Overview

1
2
9

5
4
7
8

LJ-00072-TI0

Figure 1–2

DECserver 90L

Overview 1–5

Power Indicator - Turns on when +5 volts is supplied to the unit.

Self-Test OK Indicator - Turns on when the unit has successfully
completed its diagnostics.

Network OK Indicator - Turns on when the unit is connected to a
properly terminated network.

Activity Indicator - Turns on when data is being transmitted or received
by any of the ports.

Ethernet Address - Unique physical address of the unit.

Network Connector (BNC) - Connects unit to the network. Not used
when the unit is installed in the DEChub 90 Ethernet backplane.

Port Connector (MMJ) - Connect terminals and printers to the
DECserver 90L.

Power Connector - Provides +5 volts from the DECserver 90L power
supply. Not used when the unit is installed in the DEChub 90 Ethernet
backplane.

Backplane Connector - Provides network and power connections to
the DECserver 90L when it is installed in the DEChub 90 Ethernet
backplane.

Cover - Present on standalone units only. Covers the backplane connector
and mounting assembly.

2
Installation
The DECserver 90L can be installed on a table, mounted to a wall, or in
the DEChub 90 Ethernet Backplane. Refer to Standalone Installation
when installing the unit on a table or mounting it to a wall. Refer
to Backplane Installation when installing the unit in the DEChub 90
Ethernet backplane.

Standalone Installation
To install the DECserver 90L as a standalone unit, perform the following
procedures and refer to Figure 2–1.

Mount DECserver 90L.
Locate and mount the DECserver 90L. For wall mounting, remove the
back cover on the unit and use the mounting holes on the cover as a
template to locate the mounting screws.

2–1

2–2 Installation

50 OHM
Term inator
T-Connector

Term inal

LJ-00073-TI0.DG

Figure 2–1

DECserver 90L Standalone Installation

Installation 2–3

Remove Cover (if necessary).
To remove the back cover of the DECserver 90L (Figure 2–2):
1. Insert a small screwdriver into the top mounting hole in the cover.
2. Lift up on the latch.
3. While lifting up on the latch, pull the top of the cover away from the
unit and down.

LJ-00320-TI0

Figure 2–2

Removing the Back Cover of the DECserver 90L

2–4 Installation

Make Connections.
1. Plug the power supply into the DECserver 90L.
2. Attach the Ethernet T-connector to the BNC connector on the
DECserver 90L. Make sure the Ethernet segment is properly
terminated at each end.
3. Attach the power cord to the power supply, if needed.
4. Plug the power supply into a working AC outlet.
5. The following indicators should be lit: Power, Self-Test OK, and
Network. The self-test takes approximately five seconds to complete.

Verify Ports.
Verify the operation of each port by connecting a terminal to the port.
Refer to Table 1–1 for supported terminal characteristics. Press Return
twice (autobaud) to set the operating speed of the port. While watching
the Activity LED type a character on the terminal. The LED should turn
on and off, indicating activity on the port. Perform this procedure for each
port.

Start Terminal Session.
1. Connect terminals to ports as needed.
2. To start a terminal session using a terminal connected to one of the
ports:
a. With the terminal turned on, press Return twice. This sets the
baud rate of the port to that of the terminal.
b. At the prompt ‘‘->’’, enter a node and press Return .
The DECserver 90L responds by displaying a string of dots "......"
while connecting to the selected node. Once the connection is
established, your terminal will display the system dependent login
message or prompt.
NOTE
The DECserver 90L can take a maximum of one minute
when connecting to a node for the first time.

Installation 2–5

For more information on using the DECserver 90L, refer to Chapter 3 in
this manual.

Backplane Installation
To install the DECserver 90L in the DEChub 90 Ethernet backplane,
perform the following procedures and refer to Figure 2–3.

Remove Cover (if necessary).
1. If the unit to be installed in the backplane has a cover on the back of
the unit, remove the cover (Figure 2–2).
To remove the back cover on the DECserver 90L unit:
a. Insert a small screwdriver into the top mounting hole in the cover.
b. Lift up on the latch.
c.

While lifting up on the latch, pull the top of the cover away from
the unit and down.

Mount DECserver 90L.
1. Place the lower mounting tab, located on the back of the DECserver
90L, in the appropriate mounting slot on the backplane.
NOTE
The DECserver 90L can be installed in the DEChub 90
Ethernet backplane while power is applied to the backplane
(hot-swap).

2–6 Installation

2. Rock the unit into place. An audible ‘‘click’’ is heard when the unit is
securely latched in place.
3. With the power applied to the backplane, the following indicators on
the DECserver 90L should be lit: Power, Self-Test OK, and Network.
The self-test takes approximately five seconds to complete.

LJ-00074-TI0

Figure 2–3

DECserver 90L Backplane Installation

Installation 2–7

Start Terminal Session.
1. Connect terminals to ports as needed.
2. To start a terminal session using a terminal connected to one of the
ports:
a. With the terminal turned on, press Return twice. This sets the
baud rate of the port to that of the terminal.
b. At the prompt ‘‘->’’, enter a node and press Return .
The DECserver 90L responds by displaying a string of dots "......"
while connecting to the selected node. Once the connection is
established, the system-dependent login message or prompt will
appear.
NOTE
The DECserver 90L can take a maximum of one minute
when connecting to a node for the first time.
For more information on using the DECserver 90L, refer to Chapter 3 in
this manual.

3
Operation
Using the DECserver 90L terminal server is as easy as turning on your
terminal, pressing Return twice, and entering the name of the service
(nodename) you want to connect to at the -> prompt. You may also set a
port for use by a printer.
This chapter describes how to operate the DECserver 90L. This section
describes how to start, interrupt, resume, and end a terminal session.
NOTE
LAT Version 5.0 or higher must be installed and running on a
host system before you can use the DECserver 90L. If you cannot
connect to a selected system and you are not sure if the LAT
Version 5.0 or higher is installed and running, see your system
manager for help.

Using a Terminal or Personal Computer
This section explains how to use the DECserver 90L with a terminal or
Personal Computer (PC) running terminal emulation software.

Establishing a Terminal Session
To establish a terminal session:
1. Turn your terminal on or start the terminal emulation software on
your PC.
2. Press the Return key twice, you will see the DECserver 90L prompt:
->

3. At the prompt (->), type your node name and press Return . The
DECserver 90L indicates that it is attempting to connect to the node
by displaying a string of dots "...." on the screen.

3–1

3–2 Operation

The following shows the connection to a VMS node named MYNODE.
-> MYNODE

Return

................
%DS90L-100, Connection Established
Welcome to MYNODE running VMS 5.4
Username:

NOTE
The DECserver 90L does not require the configuration of group
codes. The first time it connects to a service it learns the service
name. This can take up to 60 seconds.
The terminal session is established and control is passed to the specified
node (assuming the node is available). If you do not know your node
name(s), ask your system manager.
When a terminal session is established, most systems start some type
of log in sequence, such as prompting you for username and password.
Refer to the documentation for your specific system for information about
starting a session.

Ending a Terminal Session
A terminal session is ended by logging off or disconnecting from the
system on which your terminal session was running. Logging off a system
ends your terminal session and returns you to the DECserver 90L prompt.
The following example shows what happens when a user logs off the
VAX/VMS node MYNODE.
$ LO

Return

USER logged out at 01-JAN-1991 16:55:00.00
-> %DS90L-107, Session Disconnected
->

Operation 3–3

‘‘Last Number Redial’’
Last number redial allows a port to connect to the last service accessed
without entering the service or node name. This is done by entering the
connect command ‘‘>’’ or C[ONNECT] at the DECserver 90L prompt and
pressing Return . The following example shows how to use the last number
redial feature to reconnect to node MYNODE.
$ LO

Return

USER logged out at 01-JAN-1991 16:55:00.00
->

Return

%DS90L-100, Connection Established
Welcome to MYNODE running VMS 5.4
Username:

Interrupting a Terminal Session
You can interrupt a terminal session and return to the DECserver 90L
prompt by pressing the Break key on the terminal. When you press the
Break key, the session is interrupted, not ended, and the DECserver 90L
prompt appears as follows:
->

At this point you can issue a show or set command, resume the
interrupted session, or end the session.

Resuming an Interrupted Terminal Session
To resume an interrupted terminal session, type the connect command ‘‘>’’
or RESU[ME] at the DECserver 90L prompt. The following is an example
of resuming an interrupted terminal session.
->

Return

When you resume an interrupted session, control is returned to the point
at which the session was interrupted.

3–4 Operation

Disconnecting an Interrupted Terminal Session
After you interrupt a terminal session, you might change your mind and
decide not to resume the session. In this case, you can disconnect the
session by typing the disconnect symbol ‘‘<’’ or D[ISCONNECT] at the
DECserver 90L prompt. The following is an example of disconnecting an
interrupted terminal session.
->

Return

When you disconnect an interrupted session, your session is stopped and
the DECserver 90L prompt appears on your terminal.
NOTE
Entering the disconnect command when there is no interrupted
session to resume causes the port to enter its power-up state
(non-autobaud state).

Using a Printer
Any of the ports on your DECserver 90L can be set for use with a
printer. This is usually done by the person responsible for managing
the DECserver 90L. Chapter 4 contains information on how to set a port
for use with a printer.

DECserver 90L Commands
The commands used to establish and control a terminal session and
to manage the DECserver 90L are described in Table 3–1. Chapter 4
provides a detailed description of the SET and SHOW commands and how
they are used to manage the DECserver 90L.

Operation 3–5

Table 3–1 DECserver 90L User Commands
Symbol/Command

Function

-> service

At the prompt "->", enter the name of the
service with which you want to establish a
terminal session.

-> service node port

Establish a terminal session with the service,
node, and port specified. The node and port
are optional.

-> C[ONNECT] service node
port

Establish a terminal session with the service,
node, and port specified. The node and port
are optional. This command should be used
to establish a terminal session when a service
name conflicts with one of the DECserver 90L
commands.

-> Break

Interrupt a terminal session.

-> >

Connect to last service used or resume an
interrupted terminal session.

-> RESU[ME]

Resume an interrupted terminal session.

-> <

Disconnect an interrupted terminal session
or disconnect the port. Disconnecting the
port returns the port to the power-up state
(non-autobaud).

-> D[ISCONNECT]

Disconnect an interrupted terminal session
or disconnect the port. Disconnecting the
port returns the port to the power-up state
(non-autobaud).

-> Set

Set port or server parameters.

-> Show

Show port or server parameters.

-> Reset

Reset port or server parameters to power-up
state.

-> ? or Help

List DECserver 90L commands.

The characters in brackets [ ] do not need to be entered for the DECserver 90L to recognize
the command.

3–6 Operation

DECserver 90L Information and Error Codes
The DECserver 90L interface provides you with information or an error
message about any commands issued to the unit. Each message is made
up of a message number and the message. Table 3–2 lists each message
number and its message.
Table 3–2 DECserver 90L Information and Error Codes
Message
Number

Message

%DS90L–100

Parameters Have Been Changed

%DS90L–101

Parameters Have Not Been Changed

%DS90L–102

Authorized Mode Cleared

%DS90L–103

Power Down DS90L within 1 minute to Enable Authorize Mode

%DS90L–104

Power Down DS90L within 1 minute to Clear Authorize Mode

%DS90L–105

Manager Mode Enabled

%DS90L–106

Manager Mode Disabled

%DS90L–107

Session Disconnected

%DS90L–109

Password Changed

%DS90L–110

Port Has Been Reset

%DS90L–111

Server Has Been Reset

%DS90L–200

User requested halt

%DS90L–204

This Port is not in Manager Mode

%DS90L–205

Authorized Mode not Enabled

%DS90L–206

Authorized Mode is Already Enabled

%DS90L–207

Another Port is in Manager Mode

%DS90L–208

System Shutdown in Progress

%DS90L–209

Service In Use

%DS90L–210

Service Unavailable

%DS90L–211

Service Disabled

%DS90L–212

Entry is Not in the Queue

Operation 3–7

Table 3–2 (Cont.) DECserver 90L Information and Error Codes
Message
Number

Message

%DS90L–213

Immediate Access Rejected

%DS90L–214

Access Denied

%DS90L–215

No Session Active

%DS90L–300

Host Stopped Responding

%DS90L–302

Insufficient Information

%DS90L–303

Insufficient Host Resources to Satisfy Request

%DS90L–304

Reason Unknown

%DS90L–305

Maximum Session Limit Exists

%DS90L–306

Invalid Syntax

%DS90L–307

Invalid LAT Name

%DS90L–308

Invalid Ethernet Address

%DS90L–309

Invalid Password

%DS90L–310

Data Overflow

%DS90L–311

Illegal message

%DS90L–312

Protocol Error—Server Circuit Timer is Out of Range

%DS90L–313

Protocol Error—Number of Virtual Circuits Exceeded

%DS90L–314

Illegal Port Name

%DS90L–315

Port Name is Used by Another Port

%DS90L–316

Port In Use

%DS90L–317

Can Not Change Device Type While Printer is Busy

%DS90L–318

Invalid Character in Password

%DS90L–319

Password Not Verified

%DS90L–320

Can Not Perform Operation While Changing Authorize Mode

%DS90L–321

Connection Not Established—Network Not Connected

%DS90L–322

Disconnected—Network Not Connected

%DS90L–323

Protocol Error—Invalid Slot Received

3–8 Operation

Table 3–2 (Cont.) DECserver 90L Information and Error Codes
Message
Number

Message

%DS90L–324

Protocol Error—Invalid Service Class

%DS90L–326

No Such Service

%DS90L–327

Service is Not Offered by Requested Port

%DS90L–328

Port Name is Unknown

%DS90L–330

Password Length Exceeds 8 Characters

%DS90L–331

Invalid Port Speed

%DS90L–332

Illegal Server Name

%DS90L–333

Password Required

%DS90L–334

Cannot Use Default Port for Console

%DS90L–335

Cannot Put Subject Port into Test Mode

4
Managing the DECserver 90L
The DECserver 90L requires very little in the way of management. The
DECserver 90L does not use or require the configuration of group codes.
It requires that service ad timers be set to 60 seconds (the default) or
less. Reducing the interval for service ad time improves the response of
the DECserver 90L when making new connections. The DECserver 90L
can work with systems whose service ad timer interval is greater than 60
seconds if:
•

A LATmaster response is received.

•

The systems service ad happens to be received within 60 seconds.

The time required for the DECserver 90L to establish a connection can be
reduced to two seconds or less for any ‘‘service’’ by installing LATmaster
(V5.2) on any node in your network (see your system manager).
The DECserver 90L can be managed locally or from a remote device on
the network. Local management is done using a terminal connected to
one of the ports on the DECserver 90L. Remote management is done
using maintenance operations protocol (MOP) console carrier.
Managing the DECserver 90L includes:
•

Examining port and server parameters and network counters

•

Setting port parameters

•

Setting server name and zeroing counters

•

Security
–

Setting and clearing authorized mode

–

Enabling and disabling manager mode

–

Changing the password

4–1

4–2 Managing the DECserver 90L

Local Management
Local management of the DECserver 90L is performed with a terminal
connected to one of its eight ports and using the Set, Show, and Reset
commands of the DECserver 90L.

Remote Management
The DECserver 90L can be managed from a remote node on the network
using MOP console carrier. Once the MOP console carrier session is
established, the Set and Show commands are used to examine and set
the various port and server parameters. The Reset command is used to
reset ports and the server to the power-up state.
A VMS-based system can establish a console carrier session with a
DECserver 90L as shown in the following example. The Ethernet address
of the DECserver 90L in this example is 08-00-2B-08-32-2B and SVA-0
identifies the system’s Ethernet interface.
$ MCR NCP
$ NCP> CONNECT VIA SVA-0 PHY ADDR 08-00-2B-08-32-2B
Console connected (press CTRL/D when finished)
-> (DECserver 90L PROMPT)

Security
Security for the DECserver 90L is provided by a password protected
management mode. This mode of operation is called authorized mode and
can be set and cleared as required. When authorized mode is set, the
following conditions exist:
•

Users can only set the parameters of their port and show the server’s
parameters.

•

Manager mode must be enabled (password required) to set server
parameters and port parameters other than the one you are connected
to and to change the password.

When the DECserver 90L is first installed, authorized mode is not set and
any port can be used to set any other port’s parameters and the server’s
parameters. To set authorized mode requires physical access to the unit.
When setting authorized mode a password is entered and verified. The
units power must be cycled, turned off and then on, within one minute of
entering the password for authorized mode to be set. The cycling of the
power verifies that you have access to the unit and causes the password
to be saved in the units non-volatile RAM (NVRAM).

Managing the DECserver 90L 4–3

Management Commands
The commands used to manage the DECserver 90L are the Set, Show
and Reset commands. The set and show commands use a menu to select
the parameters to show or set. A command line mode is available for use
by network management software or by users that want to bypass the
menu interface. Refer to the Command Line section at the end of this
chapter, for more detailed information on command line mode.
The following sections show how to enter the Set, Show, and Reset
commands using the menu and the command line.

Set Command
The Set command allows you to set port or server parameters, zero
network counters, and enable and use the DECserver 90L security
features.
Setting Port Parameters
The following port parameters can be set for each port:
•

Port name

•

Port speed (baud rate)

•

Input flow control

•

Output flow control

•

Device type (terminal or printer)

•

Local or remote break

•

Remote modify

•

Test (loopback) operation

Table 4–1 describes each of the port parameters that can be set.
Port parameters can be set from the menu or by a command line entered
at the prompt. If authorized mode is set and the port parameters to be
set are for a port other than the one you are connected to, you must first
enable manager mode.

4–4 Managing the DECserver 90L

Table 4–1 Port Parameters
Field

Description

Port Name

Maximum of six characters. The following characters can be
used: alpha, numeric, -, _, and $.

Speed

Sets the receive/transmit speed of the port. When a terminal is
connected to a port, the DECserver 90L automatically sets the
speed through autobaud. For use with printers or other such
devices the speed can be set to one of six values.
1 =38400 baud
2 =19200 baud
3 = 9600 baud
4 = 4800 baud
5 = 2400 baud
6 = 1200 baud

Input Control

Enables and disables input flow control (XON/XOFF).
E = Enable
D = Disable
C = Clear (send XON)

Output
Control

Enables and disables output flow control (XON/XOFF).

Terminal
/Printer

Selects the type of device connected to the port. The port that
issues the set command cannot set its device type to the printer.

E = Enable
D = Disable
C = Clear (send XON)

T = Terminal
P = Printer
Break

Determines if the port responds to a local or a remote break.
L = Local
R = Remote

Remote
Modify

Enables and disables modification of the port by the host
system.
E = Enable
D = Disable

Managing the DECserver 90L 4–5

Table 4–1 (Cont.) Port Parameters
Field

Description

Test

Places the selected port into loopback mode. Loopback mode
can be used to verify that a port is receiving and sending
characters. The port that issues the set command cannot put
itself in loopback mode.
Y = Yes (loopback mode)
N = No

Setting Port Parameters from the Menu
To set port parameters from the menu:
1. Enter SET at the DECserver 90L prompt. The * in the menu
indicates the port you are attached to.
The following example shows how to set port 8 for use with a printer
(user entries are bolded). The following port parameters are set in
this example.
Port name: PRINT
Speed: 9600
Input control: Remains unchanged
Output control: Remains unchanged
Terminal/Printer: Printer
Break: Remote
Remote modify: Remains unchanged
Test: Remains unchanged
2. Select the port (1 through 8).
3. Set the parameters in response to the prompts. The * indicates the
current setting of the parameter for the selected port. The setting of
each parameter is terminated with a Return . Entering a Return with
no input for a parameter leaves the field unchanged. If an incorrect
entry is made the DECserver 90L signals the error and waits for a
correct entry.

4–6 Managing the DECserver 90L

-> SET

Return

-> %DS90L-100, Parameters Have Been Changed
->

Setting Port Parameters By Command Line
Command line mode allows a port’s parameters to be set with a single
entry. If you do not want to change a parameter, an entry in that field is
not required.
The format for the command line is as follows:
-> SET <port>,<name>,<speed>,<IFC>,<OFC>,<device>,<break>,<rem_mod>,<test>

Managing the DECserver 90L 4–7

The following example shows how to set port 8 for use with a printer
(user entries are bolded). The following port parameters are set in this
example.
Port name: PRINT
Speed: 9600
Input flow: Remains unchanged
Output flow: Remains unchanged
Device type: Printer
Break: Remote
Remote modify: Remains unchanged
Test: Remains unchanged
-> SET 8,PRINT,9600,,,P,R,,

Return

-> %DS90L-100, Parameters Have Been Changed
->

Setting Server Parameters
The following server parameters can be set:
•

Server name

•

Zero counters

•

Reset server and ports to factory default settings
Note: Disconnects all sessions

Table 4–2 describes each of the parameters that can be set.
Server parameters can be set from a menu or by a command line entered
at the prompt. The following sections describe how to set the server
parameters using both methods.
If authorized mode is set, you must first enable manager mode.

4–8 Managing the DECserver 90L

Table 4–2 Server Parameters
Field

Description

Name

Maximum of 16 characters. The following characters can be
used: alpha, numeric, -, _, $.

Actions

Zero the servers network counters and reset the server
N = No action taken
Z = Zero network counters
F = Reset all settable parameters to factory default settings

All sessions are disconnected

Setting Server Parameters from the Menu
To set server parameters from the menu:
1. Enter SET at the DECserver 90L prompt. The * in the menu
indicates the port you are attached to.
2. Select Server (S).
3. Set the parameters in response to the prompts. The * indicates the
current setting of the parameter. The setting of each parameter is
terminated with a Return . Entering a Return with no input for a
parameter leaves the field unchanged. If an incorrect entry is made,
the DECserver 90L signals the error and waits for a correct entry.

Managing the DECserver 90L 4–9

The following example shows how to set the server name to MYSERVER
and zero the counters (user entries are bolded).
-> Set

Return

4–10 Managing the DECserver 90L

Setting Server Parameters By Command Line
Command line mode allows server parameters to be set with a single
entry.
The format for the command line is as follows:
-> SET S,<name>,<zero_counters>

Return

The following example shows how to set the server name to MYSERVER
and zero the counters.
-> SET S,MYSERVER,Z

Return

-> %DS90L-100, Parameters Have Been Changed
->

Changing Password by Menu
The Set command is used to change the DECserver 90Ls password. The
password is a maximum of eight characters. To change the password, the
port you are using must be in manager mode.
To change the password interactively:
1. Enter SET at the DECserver 90L prompt. The * indicates the port
you are attached to.
2. Select password (P).
3. Enter the old password.
NOTE
The old, new, and verify password entries are not echoed by
the DECserver 90L.
4. Enter the new password.
5. Enter the new password again to verify it.

Managing the DECserver 90L 4–11

The following example shows how to set the password:
-> Set

Return

Changing Password by Command Line
The command line for changing the password is:
-> Set P,<old_password>,<new_password>

Return

NOTE
The old, new, and verify passwords are echoed when using
command line entry.
Set and Clear Authorized Operation
The Set command is used to set and clear authorized operation. To set
authorized operation you must have physical access to the unit because
the unit’s power must be cycled.

4–12 Managing the DECserver 90L

Setting the Authorized Operation by Menu
To set the authorized operation from the menu:
1. Enter SET at the DECserver 90L prompt. The * indicates the port
you are attached to.
2. Select Authorized (A).
3. Select Set (S).
4. Enter New Password. The password is not echoed.
5. Enter the password again to verify. The verify password is not echoed.

-> Set

Return

The password is not echoed.

Managing the DECserver 90L 4–13

Setting the Authorized Operation by Command Line
The command line for setting authorized mode operation is:
-> Set A,S,<password>

Return

NOTE
The password is echoed when using command line entry.
Clear Authorized Mode by Menu
Clearing authorized mode disables security on the DECserver 90L. To
clear authorized mode your port must be in manager mode or you must
have physical access to the unit. Physical access to the unit is required
when the units password is not known.
To clear authorized mode from the menu:
1. Enter SET at the DECserver 90L prompt. The * indicates the port
you are attached to.
2. Select Authorized (A).
3. Select Clear (C).
4. If the port you are connected to is not in manager mode, the unit’s
power will have to be cycled off and then on.

4–14 Managing the DECserver 90L

The following example shows how to clear the authorized mode.
-> Set

Return

Clear Authorized Mode by Command Line
The command line for clearing authorized mode is:
-> Set A,C

Return

Enable and Disable Manager Mode
The Set command is used to enable and disable manager mode. Only
one port can be in manager mode at any time. To enable manager mode
you must know the unit’s password. Manager mode applies only to the
port on which it was enabled. Manager mode can be enabled for one port
at a time. Once manager mode is enabled for a port, that port remains
enabled until you disable it. Manager mode can be disabled with the
Set command, by disconnecting from the port (no session), or when the
terminal is powered down.

Managing the DECserver 90L 4–15

Enabling Manager Mode by Menu
To enable manager mode from the menu:
1. Enter SET at the DECserver 90L prompt. The * indicates the port
you are attached to.
2. Select Manager (M).
3. Select Enable (E).
4. Enter password. The password is not echoed.
The following example shows how to enable manager mode.
-> Set

Return

The password is not echoed.

4–16 Managing the DECserver 90L

Enable Manager Mode by Command Line
The command line for enabling manager mode is:
-> Set M,E,<password>

Return

NOTE
The password is echoed when using command line entry.
Disable Manager Mode by Menu
To disable manager mode operation for a port, you must be attached to
the port and use the Set command.
To disable manager mode from the menu:
1. Enter SET at the DECserver 90L prompt. The * indicates the port
you are attached to.
2. Select Manager (M).
3. Select Disable (D).
The following example shows how to disable manager mode.
-> Set

Return

Managing the DECserver 90L 4–17

Disable Manager Mode by Command Line
The command line for disabling manager mode is:
-> Set M,D

Return

Show Command
The Show command allows you to show port or server parameters, status,
and counters.
Show Port
The Show Port command displays the status for each of the eight ports
of the DECserver 90L. Table 4–3 describes each of the fields in the port
status display.
Table 4–3 Port Status Description
Field

Description

Name

Shows the name of each port.

Speed

Shows the receive/transmit speed.

In Flow

Tells if the input flow control is enabled or disabled and gives
its current state (on/off).

Out Flow

Tells if the output flow control is enabled or disabled and gives
its current state (on/off).

Type

Tells if the device type is set for a terminal or printer.

Break

Tells if the port is set for local or remote break.

Rem Mod

Tells if remote modify is enabled or disabled.

Test

Tells if the loopback test is active.

Status

Tells if the port is connected to a service, local (the terminal is
at the DECserver 90L prompt), or off.

Service

Tells the name of the service to which a port is connected.

Node

Gives the name of the node to which a port is connected.

Port

Gives the name of the port on the node the DECserver 90L to
which a port is connected.

Frame Err

A counter that gives the number of framing errors for a port.

Queued

Printer ports only. Lists jobs queued to the port (maximum of
seven plus one active).

4–18 Managing the DECserver 90L

The Show command allows you to examine the status of all ports or a
selected port. The DECserver 90L provides additional information when
examining selected ports. The Show Port command can be entered from
the menu or by a command line.
Show Port by Menu
The following example shows the Show Port command used to examine
the status of all the ports. The example shows the command entered
interactively.
1. Enter Show at the DECserver 90L prompt. The * indicates the port
you are attached to.
2. Select Ports (P).
-> Show

Return

MYPORT
38400
ENA/on
ENA/on
TERM
LOCAL
DIS
NO
CONN
0

PORT_2
19200
ENA/on
ENA/on
TERM
LOCAL
DIS
NO
LOCAL
0

PRINT
PORT_4
4800
ENA/on ENA/on
ENA/on ENA/on
PRINTER TERM
REMOTE LOCAL
DIS
DIS
NO
NO
CONN
OFF
0
0

PORT_5

PORT_6

PORT_7

PORT_8

ENA/on
ENA/on
TERM
LOCAL
DIS
NO
OFF
0

Managing the DECserver 90L 4–19

Show Port by Command Line
The command line equivalent is:
-> Show P

Return

Show Status of Port by Menu
The following example shows how to examine the status of a selected port
using menu mode.
1. Enter Show at the DECserver 90L prompt. The * indicates the port
you are attached to.
2. Select 1.
-> Show

Return

4–20 Managing the DECserver 90L

Show Status of Port by Command Line
The command line equivalent is:
-> Show 1

Return

Show Server
The Show Server command displays the server type, protocol it runs,
Ethernet address, server name, network counters, and status of security,
NVRAM, and the network connection.
Show Server by Menu
The Show Server command can be entered interactively or by a command
line. The following example shows the Show Server command entered
interactively.
1. Enter Show at the DECserver 90L prompt. The * indicates the port
you are attached to.
2. Select Server (S).

Managing the DECserver 90L 4–21

Address:
Name:

08-00-2B-XX-XX-XX
MYSERVER

10
10
3333
0
0
0
0

Seconds Since Zeroed:
Send Failures:
Receive Failures:
Unrecognized Destination:
Data Overrun:
User Buffer Unavailable:
System Buffer Unavailable:

394
0
0
504
0
0
0

Messages Received:
Messages Transmitted:
Solicitations Accepted:
Solicitations Rejected:
Multiple Node Addresses:

10
10
0
17
0

Duplicates Received:
Messages Re-Transmitted:
Illegal Messages Rcv’d:
Illegal Slots Rcv’d:
Illegal Multicasts Rcv’d:

0
0
0
0
0

Keepalive Timer:
Retransmit Limit:

20
8

Security:
NVRAM:
Network:

Show Server by Command Line
The command line equivalent is:
-> Show S

Return

Disabled
OK
OK

4–22 Managing the DECserver 90L

Reset Command
The Reset command allows you to reset individual ports or server
parameters to their power-up state and run the units self-test. Resetting
the server sets all port and server parameters to their power-up state and
disconnects all sessions and runs self-test. When the DECserver 90L is in
authorized mode the port you are using must be in manager mode to reset
another port or the server.
For ports that have not had their speed set using the set command they
will be in the non-autobaud state (no speed set). After being reset, the
Return key must be pressed twice to autobaud the port and set the speed.
Reset Command by Menu
The following example shows the reset command used to reset port 1. The
examples show the command entered interactively.
1. Enter Reset at the DECserver 90L prompt. The * indicates the port
you are attached to.
2. Enter 1.
->

RESET

Return

Reset Command by Command Line
The command line equivalent is:
-> RESET 3

Return

-> %DS90L-110, Port Has Been Reset
->

Managing the DECserver 90L 4–23

Command Line
The DECserver 90L user interface provides a command line interpreter
as an alternate means to set and show port and server parameters. The
command line interpreter helps with the control of the DECserver 90L
by network management software and by users who want to bypass the
menu interface.
For command line entries, the commands and parameters are not entered
through a menu on the terminal screen. The user’s input is echoed and
the complete command is processed after a Return is entered. Note that
any error in parsing a command will cause the entire command to be
ignored.
A space is required between the command (set or show) and its
parameters. The command line interpreter uses comas (,) as a delimiter
to separate the different fields in a command line. To make the command
line interpreter easier to use the current value (default) for a field will be
used when:
1. There is no entry for a field.
2. A Return is entered before all the parameters have been entered.
The following are the command lines that can be entered at the
DECserver 90L prompt (->).
Set Port Parameters:
->SET <port>,<name>,<speed>,<IFC>,<OFC>,<device>,<break>,<rem_mod>,<test>
------------------------------------------------------------------1
1200
E
E
T
L
E
Y
2
2400
D
D
P
R
D
N
3
4800
C
C
4
9600
5
19200
6
38400
7
8

Set Server Parameters:
-> SET S,<name>,<actions>
-----------------N
Z
F

4–24 Managing the DECserver 90L

Set Password:
-> SET P,<old_password>,<new_password>

Set Authorized Mode:
-> SET A,S,<password>

Clear Authorized Mode:
-> SET A,C

Enable Manager Mode:
-> SET M,E,<password>

Disable Manager Mode:
-> SET M, D

Show Port Parameters:
-> SHOW P

Show Server Parameters:
-> SHOW S

Reset Port Parameters:
-> RESET <port>
--------------1
2
3
4
5
6
7
8

Managing the DECserver 90L 4–25

Reset Server Parameters:
-> RESET S

Using a Printer
The installation requirements for printers are dependent on the system
environment in which it is installed. However, there are three basic steps
that need to be performed when setting a DECserver 90L port for use by
a printer.
1. Choose the port to be used.
–

Set the server name if it has not already been done.

–

Set the port for use by a printer. The following port parameters
should be set:
Name = port name you want to use
Speed = speed of printer
Input flow = as required by printer (usually enabled)
Output flow = as required by printer (usually enabled)
Device type = Printer
Break = as required by printer (usually don’t care)
Remote Modify = enabled if host needs to be able to change
printer characteristics (usually disabled)

2. Set up the system so it can access the printer port. Refer to your
system documentation for information on this procedure.
For example on a VAX/VMS system you would use LATCP to map
LTA1234: to the server name and port name on the DECserver 90L.
A typical VMS setup is as follows:
$ MCR LATCP
LCP>CREATE PORT LTA1234
Local Port Name = LTA1234:

LCP>SET PORT LTA1234:/NODE=MYSERVER/PORT=PRINT
Specified Remote Node Name = MYSERVER
Specified Remote Port Name = PRINT
Link Name = LAT$LINK
LCP>EXIT
$

4–26 Managing the DECserver 90L

3. Configure the print queue to point to the port (LTA1234:) defined in
the previous step. Refer to your system documentation for information
on this procedure.
NOTE
If you want to set all eight ports for use by printers, the eighth
port’s parameters must be set using a MOP console carrier
session.

5
Troubleshooting
This chapter describes how to troubleshoot the DECserver 90L. Before
you begin you should:
1. Verify that the unit is properly installed.
2. Note the fault condition.
3. Isolate the problem. Use Table 5–1 as a guide to determine the
probable cause and the suggested solution.
Table 5–1 DECserver 90L Troubleshooting
If...

Then...

Do this...

The power LED is
not ‘‘on’’

The DECserver 90L
is not receiving +5V.

Check the AC power
connection and verify that
the AC outlet is working.
Check the power connection
on the DECserver 90L. If the
problem still exists, replace the
power supply.

The self-test LED is
not ‘‘on’’

The unit did not pass
self-test.

Replace the unit.

The network LED is
not ‘‘on’’

It is a network
problem.

Check network connection.
Check if the segment is
properly terminated.
Disconnect unit from network.
Connect T-connector with two
50 ohm terminators. If the
LED turns ‘‘on’’, then it is a
network problem. If the LED
stays ‘‘off’’, then replace the
unit.

5–1

5–2 Troubleshooting

Table 5–1 (Cont.) DECserver 90L Troubleshooting
If...

Then...

Do this...

There is no response
at the prompt (->)

The port and
terminal baud rates
are not compatible.

Shutoff and turn on terminal.
Press Return twice to set the
port baud rate (autobaud).
Terminal transmit and receive
speeds must be the same.

You cannot connect
to the service

The terminal flow
control is disabled.

Reset the terminals flow
control.

The port type is set
to the printer.

Set port to term.

There is faulty
wiring between the
terminal and the
DECserver 90L.

While watching the activity
LED on the DECserver 90L,
the LED should blink when
characters are typed at
the terminal. If not, check
that the activity LED blinks
when characters are typed on
terminals connected to other
ports. If the activity LED
blinks the wiring between the
terminal and the DECserver
90L or the terminal is faulty.

The service is not
available.

Check for service availability.

The LAT is not
installed on the host
system.

Verify that the LAT Version
5.0 or higher is running on the
host system.

It is a Network
Problem.

Check the network LED, it
should be on. If not, check
the network connection.
If the LED is on, you can
check network connectivity by
running MOP loopback or a
MOP console carrier session.

Troubleshooting 5–3

Table 5–1 (Cont.) DECserver 90L Troubleshooting
If...

Then...

Do this...

The printer does not
work

The port is not set
for a printer.

Set the port for the printer.

The baud rates are
incompatible.

Check printer and port baud
rates.

The flow control is
not set as required
by the application.

Check flow control.

The port and or
server name does not
match with the host.

Verify that the names match.

A
Specifications
Specifications for the DECserver 90L are divided into the following
categories:
•

Physical dimensions

•

Environmental specifications

•

Electrical specifications

•

LAT specifications

Physical Dimensions
The physical dimensions of the DECserver 90L are as follows:
Dimension

Value

Height

3.18 cm ( 1.25 in)

Width

27.31 cm ( 10.75 in)

Depth

12.70 cm ( 5.0 in)

Weight

.77 kg ( 1.7 lb)

A–1

A–2 Specifications

Environmental Specifications
The DECserver 90L is designed to operate in an office environment
or equipment room environment such as, telephone closets or satellite
equipment rooms. It is not intended to operate in an air plenum.

Operating Environment
The operating environment for the DECserver 90L is as follows:
Item

Value

Temperature

5° C to 50° C (41° F to 122 ° F)

Maximum rate of change

20° C/hr (36° F/hr)

Relative humidity

10 % to 95 % (non-condensing)

Wet-bulb temperature

32° C ( 90° F) maximum

Dew point

2° C (36° F) minimum

Altitude

Sea level to 2.4 km (8000 ft)

Air flow

Convectively cooled. A minimum of 10 cm(4 in) of
space must be provided on both ends of the unit
for adequate air flow.

Shipping Environment
The shipping environment for the DECserver 90L is as follows:
Item

Value

Temperature

-40° C to 66° C (-40 ° F to 151 °F)

Relative humidity

10 % to 95 % (non-condensing)

Altitude

Sea level to 4.9 km ( 16000 ft)

Specifications A–3

Power Specifications
The following sections describe the power specifications for the DECserver
90L.

Power Supply
Item

Value

Voltage (Domestic)

104 Vac to 128 Vac ( nominal 120 Vac)

Voltage (International)

208 Vac to 256 Vac (nominal 240 Vac)

Current at 120 volts

.25 amps

Current at 240 volts

.125 amps

Frequency

50 Hz to 60 Hz

Power consumption

16 watts

Output voltage

5.1 Vdc

Output current

1.8 A

DECserver 90L
Item

Value

Input voltage

4.75 to 5.25 Vdc

Input current

1.0 A

Connector Pin Out
Table A–1 describes the pin out of the MMJ connectors on the DECserver
90L.
NOTE
The DECserver 90L does not provide modem control signals.

A–4 Specifications

Table A–1 MMJ Pin Out
Pin

Signal Name

Ready-Out or DSR1

Transmit (TXA)

Transmit return (RC)

Receive return (RXB)

Receive (RXA)

Ready-In or DTR2

1 This signal is pulled high when power is applied to the DECserver 90L.
2 This signal is tied to ground through a 3K ohm resistor.

Figure A–1 shows the circuit connections for each port.
+5V
150
EIA
423
Driver

EIA
423
Recv’r

Ready-Out or DSR

Transmit

Transmit Return

Receive Return

Receive

Ready-In or DTR

MMJ

LJ-00562-TI0.DG

Figure A–1

Port Circuit

Specifications A–5

LAT Specifications
This section provides a description of the LAT implemented by the
DECserver 90L. Table A–2 lists the server characteristics.
Table A–2 LAT Server Characteristics
Characteristic

Setting

High protocol

x5.2.0

Low protocol

x5.0.0

Product type code

Node type

Master

Keepalive timer

20s

Master circuit timer

80ms

Local cache node limit

Password

8 characters maximum

Prompt

Queue limit

7 per port

Retransmit limit

Session limit

8 (1 per port)

Server name

16 characters (settable)

Table A–3 lists the port characteristics.
Table A–3 LAT Port Characteristics
Characteristic

Setting

Character size

Flow control

XON/XOFF or disabled

Parity

None

Speed (Input = Output)

1200 to 38.4K

Name

6 characters (settable)

Break

Local, remote (settable)

Session limit

B
Related Documentation
Document Title

Order Number

DECbridge 90 Owner’s Manual

EK-DEWGB-OM

DEChub 90 Owner’s Manual

EK-DEHUB-OM

VMS LAT Control Program (LATCP)
Manual

AA-LA32B-TE

Open DECconnect Building Wiring
Components Applications Catalog

EB-K2407-42

DECconnect System Planning and
Configuration Guide

EK-DECSY-CG

Ordering Information
Customers may order documents by phone or mail.
Continental USA and Puerto Rico
Call 800-258-1710 or mail to:
Digital Equipment Corporation
Peripherals and Supplies Group
P.O. Box CS2008
Nashua, NH 03061
New Hampshire, Alaska, and Hawaii
Call 1-603-884-6660.
Outside the USA and Puerto Rico
Mail to:
Digital Equipment Corporation
Attn: Accessories and Supplies Business Manager
c/o Local Subsidiary or Digital-Approved Distributor

B–1

B–2 Related Documentation

Digital Personnel
Digital personnel may order these documents from:
Digital Equipment Corporation
444 Whitney Street
Northboro, MA 01532
Attn: Publishing and Circulation Services (NRO3/W3)
Order Processing Section

Index
A

Activity indicator, 1–5
Authorization operation, set and
clear, 4–11

Environmental specifications, A–2
Error, fault conditions, 5–1
Error codes and information, 3–6 to
3–8
Ethernet address
location of, 1–5

B
Backplane connector, 1–5
Backplane installation, 2–5

F
Fault conditions, 5–1

C
Command line, 4–23
Commands
for management, 4–3
symbols and functions table, 3–4
to establish and control a
terminal session, 3–4
to manage a terminal session,
3–4
Connectors
backplane, 1–5
MMJ pin out, A–3
network, 1–5
port, 1–5
power, 1–5
Cover
location of, 1–5

G
Getting started, 1–2

I
Indicators
activity, 1–5
network ok, 1–5
power, 1–4
self-test ok, 1–5
troubleshooting, 5–1
Information and error codes, 3–6 to
3–8
Installation
on a table, 2–1
summary of, 1–2
types of
backplane, 2–5 to 2–7
standalone, 2–1 to 2–5
wall mounting, 2–1

Index 1

2 Index

L
Last number redial, 3–3
LAT specifications, A–5
Local management, 4–2

Power
connector, 1–5
indicator, 1–4
specifications, A–3
troubleshooting, 5–1
Printer
troubleshooting, 5–3
using a, 3–4, 4–25

M
Management
commands, 4–3
local, 4–2
remote, 4–2
Manager mode
disabling, 4–14
enabling, 4–14
Messages
information and error codes, 3–6
to 3–8

N
Network
connector, 1–5
ok indicator, 1–5
troubleshooting, 5–1

P
Password
changing by menu, 4–10
Personal Computer
how to use the DECserver 90L
with a, 3–1
Physical dimensions, A–1
Port
reset, 4–22
setting parameters, 4–3
by command line, 4–6
from the menu, 4–5
show status, 4–17
troubleshooting, 5–1
Port connector, 1–5

R
Redial, last number, 3–3
Reset
by menu, 4–22

S
Security, 4–2
Self-test
ok indicator, 1–5
troubleshooting, 5–1
Server
reset, 4–22
setting parameters, 4–7
by command line, 4–10
from the menu, 4–8
show by menu, 4–20
Set command, 4–3
Specifications, A–1
Standalone installation, 2–1

T
Terminal
how to use the DECserver 90L
with a, 3–1
supported characteristics, 1–3
troubleshooting, 5–1
Terminal session
commands, 3–4
disconnecting an interrupted
session, 3–4
ending a session, 3–2

Index 3

Terminal session (Cont.)
establishing a session, 3–1
interrupting a session, 3–3
resuming an interrupted session,
3–3
Troubleshooting
determining cause and solution,
5–1 to 5–3