Cabletron Systems SmartSwitch SBU128 User manual

SBU128
User Manual
Fivemere Ltd. Cabletron Systems Ltd.
Fivemere House Network House
161 High Street Newbury Business Park
Aldershot London Road, Newbury
Hampshire, England Berkshire, England
GU11 1TT RG13 2PZ
Telephone: [44] (0)1635 580000
Fax: [44] (0)1635 44578

SBU128 User Manual
80-10200000-01ii
Publication — 80-10200000-01
Publication Notice:
This manual has been compiled and checked for accuracy. However the
information contained in this manual does not constitute a warranty of
performance. Cabletron Systems Ltd. reserves the right to revise this
publication from time to time without notice. Cabletron Systems Ltd.
assumes no liability for losses incurred as a result of out of date or incorrect
information contained in this manual.
Proprietary Notice:
© 1998, Cabletron Systems Ltd., all rights reserved.
This document may not in whole or part be copied, photocopied, reproduced,
translated, or reduced to any electronic medium or machine-readable form
without prior consent from Cabletron Systems Ltd.
Approval Notice:
This equipment is approved for connection to all United Kingdom
telecommunications services, including British Telecom PLC, Hull City
Council and Mercury Communications, and is subject to the conditions set
out in these instructions for use.
All users of this equipment in the UK and Europe must make themselves
familiar with the statutory instructions contained in Section 9.
Pan European Approval:
Where the Pan European Approval CE Mark ‘168X’ is applied to the product;
this approval is for connection of the ISDN, X.21 and V.35 interfaces within
the European Community (EC).
Approval in non EC countries is subject to local regulations in force, please
contact your Technical Support for information.
EMC Directive:
This product has been designed for use in Commercial and Light Industrial
environments and tested to relevant EMC Standards as listed in the
European O.J. All testing was carried out using screened interconnection
cables. Should the equipment be used in a different environment the user
may need to take additional EMC precautions.
Fivemere Ltd. is a subsidiary of Cabletron Systems Inc., USA.

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History Sheet
80-10200000-01 V1.00 Software 31 July 1998

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TABLE OF CONTENTS
1THIS IS THE SBU128 1–1
1.1 INTRODUCTION 1–1
1.2 FEATURES 1–3
1.3 PRODUCT OVERVIEW 1–4
1.3.1 NETWORK SECURITY 1–4
1.3.2 TELEPHONE NUMBER STORAGE 1–4
1.3.3 CIRCUIT FAILURE 1–4
1.3.4 SPOOFING 1–5
1.3.5 TALKWIRE 1–5
1.3.6 POLLING 1–5
1.3.7 ALARMS 1–6
2THE HARDWARE 2–1
2.1 INTRODUCTION 2–1
2.2 DLC INTERFACE CHARACTERISTICS 2–2
2.3 INTERFACE PIN ASSIGNMENTS 2–3
2.3.1 USER AND LINK 2–3
2.3.2 COMMAND PORT 2–4
2.4 X21 AND V35 INTERFACE LINKS 2–5
2.4.1 X21 USER/LINK PIN 1 DEFINITION 2–5
2.4.2 V35 USER/LINK PIN 1 DEFINITION 2–5
2.4.3 X21 RECEIVER TERMINATIONS 2–5
2.4.4 V35 RECEIVER TERMINATIONS 2–5
2.4.5 ISDN 2–6
2.5COMMAND TERMINAL ACCESS 2–6
2.6 NON VOLATILE OPTIONS 2–6
2.6.1 PRODUCT AND NETWORK VARIANTS 2–6
2.6.2 S-BUS POWER DETECTION 2–7
3FRONT AND REAR PANEL DESCRIPTIONS 3–1
3.1 FRONT PANEL DESCRIPTION 3–2
3.1.1 USER INDICATORS 3–3
3.1.2 BACKUP BUTTON, FACTORY DEFAULT 3–4
3.1.3 TALKWIRE AND ALERT INDICATORS 3–4
3.1.4 ISDN INDICATORS 3–5
3.1.5 STATUS INDICATOR 3–5
3.1.6 POWER INDICATOR 3–5
3.2 REAR PANEL DESCRIPTION 3–6

TABLE OF CONTENTS
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3.2.1 COMMAND PORT 3–6
3.2.2 USER AND LINK PORTS 3–6
3.2.2.1USER AND LINK PIN ASSIGNMENTS 3–6
3.2.3 ISDN 3–6
3.2.3.1BASIC RATE S (EUROPE) INTERFACE 3–7
3.3 MAINS INPUT AND WIRING 3–8
3.4 SUPPLY RATINGS 3–9
4CONFIGURATION COMMANDS 4–1
4.1 INTRODUCTION 4–1
4.2 MENU DESCRIPTION 4–1
4.3 TOP LEVEL MENU 4–2
4.4 OPERATION MENU 4–3
4.5 CONFIGURATION MENU 4–4
4.5.1 SYSTEM MENU 4–5
4.5.2 COMMAND PORT MENU 4–5
4.5.3 ALARM PORT MENU 4–7
4.5.4 ALARMS MENU 4–8
4.5.5 USER PORT MENU 4–12
4.5.6 EDIT STORE MENUS 4–12
4.5.6.1INTERFACE MENU 4–13
4.5.6.2CALL CONTROL MENU 4–17
4.5.6.3LEASED CIRCUIT FAILURES MENU 4–19
4.5.6.4BACKUP MENU 4–20
4.5.6.5RESTORE MENU 4–21
4.5.6.6TIME WINDOWS MENU 4–22
4.5.6.7ISDNTEST MENU 4–23
4.5.6.8COPY STORE MENU 4–24
4.5.6.9RESET STORE TO DEFAULTS MENU 4–25
4.6 NUMBER STORE MENU 4–25
4.7 CYCLIC DIALLING STORE 4–27
4.8 LINE CONFIGURATION 4–28
4.9 ISDN MENU 4–28
4.10 NON VOLATILE OPTIONS 4–28
5TALKWIRE OPERATION 5–1
5.1 INTRODUCTION 5–1
5.1.1 LINE USAGE 5–1
5.2 ENABLING/DISABLING THE TALKWIRE FACILITY 5–2
5.3 INITIATING A TALKWIRE CALL 5–2

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5.4 USING TALKWIRE FOR DLC TESTING 5–3
5.5 LOCAL MODE 5–3
5.6 REMOTE MODE 5–4
5.7 USING TALKWIRE DURING A BACKUP 5–4
6POLLED MANAGEMENT 6–1
6.1 INTRODUCTION 6–1
6.2 CONFIGURING THE SBU128 POLLING ADDRESS 6–1
6.3 CONFIGURING THE POLLED COMMAND MODE 6–2
6.4 CONNECTING TO A SPECIFIC SBU128 WITHIN A POLLED ENVIRONMENT 6–2
7SBU128 SPECIFICATION 7–1
8CABLE SPECIFICATIONS 8–1
8.1 X.21 USER AND LINK CABLES 8–2
8.2 V.35 USER CABLE 8–3
8.3 V.35 LINK CABLE 8–3
8.4 COMMAND PORT CABLE 8–4
8.5 POLLED MANAGEMENT MODE 8–4
9EUROPEAN APPROVALS INFORMATION 9–1
10 GLOSSARY OF TERMS 10–1
11 COMMAND MAPS 11–1
11.1 CONFIGURATION MENU 11–2
11.2 OPERATION MENU 11–4

This is the SBU128
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1 This is the SBU128
1.1 Introduction
The SmartSWITCH SBU128 Backup Unit provides an effective, easy to
implement, automatic backup over the ISDN (Integrated Services Digital
Network) for an X.21 or V.35 PTO Leased Digital Circuit (DLC).
The ISDN Basic Rate Interface (BRI) is provided by a public switched
digital network, enabling simultaneous multi-service connection over a
single pipe, consisting of two 64kbit/s data paths and one 16kbit/s control
channel.
The SBU128 is available as a single channel device, but using both
ISDN 64kbit/s ‘B’ channels providing backup on ISDN for the user at
128kbit/s.
The SBU128 is designed to sit in the data path between the PTO DLC
Network Termination Unit (NTU) and your user equipment, see Figure
1.1.

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ISDN
(Backup Circuit)
User
Equipment
User
Equipment
Digital Leased Circuit N
T
U
N
T
U(Main Circuit)
SBU128 SBU128
Figure 1.1 SBU128 sits in the data path
During normal operating conditions, user data passes over the DLC, with
the SBU128 remaining transparent to the system. If a failure occurs on
the DLC, this is detected by the SBU128. After a user defined elapsed
time, the SBU128 dials a remote SmartSWITCH BACKUP unit via the
ISDN line. Upon verification of an acceptable connection the data is
then re-directed over this backup path.
The backup operation is user configured for either automatic or manual
initiation. While the backup data circuit is in use the SBU128 monitors
the failed DLC line and upon detection of its recovery clears the ISDN
call, when data is returned to the DLC line (main leased circuit).
Note that the SmartSWITCH BACKUP product range was previously
known as the CyberBACKUP range, denoted by ‘CBU’ instead of ‘SBU’.

This is the SBU128
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1.2 Features
The main features include:
• Interference free operation of the DLC, with the SBU128 installed.
• Support for synchronous data rates of 600, 1k2, 2k4, 4k8, 9k6, 19k2,
38k4, 48k, 56k, 64k, 128kbit/s.
• Support for asynchronous data rates of 300, 600, 1k2, 2k4, 4k8,
9k6, 19k2, 38k4 bit/s.
• Asynchronous word lengths of 7, 8, 9, 10, 11 & 12 bits.
• Automatic fault detection on the DLC circuit.
• Fully automatic or manually initiated dialling and backup of the DLC.
• Local or remote control of the switch to the backup circuit.
• Fully automatic or manually initiated restoral to the main circuit.
• Automatic re-dial and alternate number dialling.
• Storage of 20 ISDN telephone numbers for the User port.
• 20 digit sub-address number.
• 20 digit Multiple Subscriber Number.
• User definable line failure detection modes.
• Remote Configuration and monitoring.
• Automatic Remote Alarm Reporting via ISDN ‘B’ channel.
• Structured operation and configuration menu system.
• Line integrity testing, both manual and automatic.
• ‘Alarm’ output port for event logging, printing.
• Security using Calling Line Identification.
• ‘Pass Through’ relays in the event of a power loss.
• Talkwire compatibility with other Cabletron SmartSWITCH BACKUP
products.
• Password protected command interface.
• Multiple Time Windows automatic back up operation.
• Remote backup spoofing to reduce the burden of central site call
costs.
• Local spoof of transmit data to prevent unwanted backup with host or
terminal failure.

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1.3 Product Overview
This user manual is arranged to take you through the basics of the
hardware, then to software set-up and on to the more specialised user
definable software facilities of your SBU128.
SBU128 software configuration is generally not a complex operation. In
many applications once you have correctly configured the hardware and
installed your SBU128s, the default software configuration settings will
suffice to provide reliable backup operation.
In this section there is a brief overview of many of the more specialised,
software configurable, features of your SBU128. Each topic is dealt with
in detail later in this manual.
1.3.1 Network Security
Your SBU128 contains an integral security facility, designed to protect it
from being accessed by unauthorised users via the ISDN.
If the security option is enabled (ANSWER is set to CLID), the answering
SBU128 will only accept a call originating from an ISDN number
matching one of those stored in its file of telephone numbers.
1.3.2 Telephone Number Storage
The non volatile memory will store up to 20 telephone numbers, allowing
you to select a backup telephone number for any particular circuit.
Alternative numbers can be dialled in the event of an unsuccessful call.
1.3.3 Circuit Failure
Your SBU128 can detect a circuit failure if it detects any of the following
conditions:
• No data is received from the DLC.
• No clock is detected on the link.
• The I/DSR signal from the DLC NTU goes to the OFF condition.
• The C/DTR signal from the User DTE equipment goes to the ON
condition.
User selectable time-outs can be independently set for all of the
detection facilities mentioned, except C/DTR from the DTE.