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assumes no liability for losses incurred as a result of out of date or incorrect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.

SBU128 User Manual
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History Sheet
80-10200000-01 V1.00 Software 31 July 1998

SBU128 User Manual
80-10200000-01iv
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
80-10200000-01 v
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
80-10200000-01 1–1
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.

SBU128 User Manual
80-10200000-011–2
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
80-10200000-01 1–3
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.

This is the SBU128
80-10200000-01 1–5
1.3.4 Spoofing
There are two occurrences with automatic backup technology which
need to be provided for.
The first is where a terminal or CPU stops transmitting idle data frames.
In this instance the SBU128 would normally backup, which is
undesirable. Enabling the SBU128 Transmit Spoof causes a line
inversion to be sent once a second whenever no data is transmitted from
the user DTE to the User port; this prevents data loss backup from
occurring.
The second is where a central site does not want to bear the cost of all
backup calls. Enabling the Remote Backup Spoofing causes transmit
data to the DLC to be clamped to a constant mark, thus causing the
remote SBU128 to detect dataloss, and then backup.
1.3.5 Talkwire
Talkwire is the facility which enables remote control and configuration of
an SBU128 over the ISDN network when data is being routed over the
DLC.
As this feature allows you access to all SBU128s connected to the ISDN
(providing you have the correct telephone number), the SBU128
supports the Network provided Calling Line Identification facility for
enhanced security.
1.3.6 Polling
In a large network of SBU128s, all units can be interconnected and
controlled using a single terminal.
A “poll” number can be set for each unit within the group, allowing
individual SBU128s to be accessed from the terminal by using the poll
numbering system.

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1.3.7 Alarms
Various alarm conditions are available that alert the user to the SBU128
alarm status. You can also define which of these EVENTs you want to
be output as an ALERT. The ALERT message is defined as being an
alarm that is passed across a network of several Cabletron backup units.
An EVENT message occurs locally, and is seen only when the unit is
actively polled.
For example, incoming calls and DLC failure can be programmed to
cause ALERTs, Talkwire Active/Inactive and Ringing are only events.
An ALERT message can also be programmed to occur when password
access is denied.

The Hardware
80-10200000-01 2–1
2 The Hardware
2.1 Introduction
All SBU128 configuration options are software controlled, and settings
can easily be altered after the unit is installed in the system.
However the physical interface characteristics of the USER and LINK
ports are defined at manufacture by using separate pcb modules which
are not changeable except at the premises of your equipment supplier
and maintainer. They must only be changed by your supplier or
installation engineer.
WARNING. Access to the internal workings of your SBU128 is
strictly denied to all users, and may only be performed by
suitably qualified personnel. Any attempt to remove the outer
casing of your product will invalidate its approval.
Zone dangereuse! reservée au personnel autorisé. Ne pas
ouvrir. Tensions dangereuses.
Gefäh! Bereich. Nur für fachpersonal. Nicht öffnen
berührungsgefahr!
Pericole! Solo personale addestrato. Non aprire. Tensioni
pericolase all ‘interno.
Area peligrosa solo personal mantenimiento. No abrir.
Tension. Peligrosa.

SBU128 User Manual
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Area perigosa somente pessoal técnico treinado. Não abra.
Voltagens perigosas no interior.
Farligt omräde endast för utbildad personal. Öppna ej. Farlig
spanning inuti.
Farligt omräde. Kun adgang for teknisk uddannet personale.
Farlig spænding indeni. Luk ikke op.
Vaarallinen alue vain koulutetulle huoltohenkilöstölle.
Vaarallinen jännite. Alã avaa.
Fare - Må ikke åpnes. Farlige spenninger innenfor.
Gevaarlijk. Toogang alleen voor onderhoudspersoneel. Niet
openen. Gevaarlijke voltages.
2.2 DLC Interface Characteristics
X21 and X21bis Digital Leased Circuit types include V11 and V35 as
electrical interface options.
Your SBU128 has been designed for compatibility with V35 and X21
interfaces, through choice of pcb interface module at the time of
ordering.
A one to one cable is required on both the User and Link sides of the
SBU128. Cable specifications are detailed in section 10 and cables are
available from your SBU128 supplier.

The Hardware
80-10200000-01 2–3
2.3 Interface Pin Assignments
2.3.1 User and Link
Pin assignments of the USER and LINK connectors will vary with the
interface module type.
The USER ports are configured as physical DCEs and the LINK ports are
configured as physical DTEs. Their pin assignments are:
V35 operation
Pin Circuit Signal
A 101 Protective Ground
B 102 Signal Ground/Common Return
C 105 Request to Send
D 106 Clear to Send
E 107 Data Set Ready
F 109 Data Channel Received Line Signal Detector
H 108 Data Terminal Ready
J 125 Calling Indicator
K - Unused
L 141 Local Loopback
M - Unused
N 140 Loopback/Maintenance Test
P 103(A) Transmitted Data A
R 104(A) Received Data A
S 103(B) Transmitted Data B
T 104(B) Received Data B
U - Unused
V 115(A) Receiver Signal Element Timing A
W - Unused
X 115(B) Receiver Signal Element Timing B
Y 114(A) Transmitter Signal Element Timing A
Z - Unused
AA 114(B) Transmitter Signal Element Timing B
BB - HH Unused
JJ Unused
KK Unused
LL Unused
MM - Unused
NN 142 Test Indicator

SBU128 User Manual
80-10200000-012–4
See section 2.4.1 for details of Pin 1 connection to Protective Ground,
factory default setting assumes no links fitted.
X21 operation
Pin Circuit Signal
1 SHLD Protective Ground
2 T(A) Transmit
3 C(A) Control
4 R(A) Receive
5 I(A) Indication
6 S(A) Signal Element Timing
7 - Unused
8 G Signal Ground or Common Return
9 T(B) Transmit
10 C(B) Control
11 R(B) Receive
12 I(B) Indication
13 S(B) Signal Element Timing
14 - Unused
15 - Unused
See section 2.4.2 for details of Pin 1 connection to Protective Ground,
factory default setting assumes no links fitted.
2.3.2 Command Port
Pin assignments on the 25-way connector are:
Pin no. Circuit Circuit name Source
1 GND Protective Ground
2 103 Transmit Data DTE
3 104 Receive Data DCE
4 105 Request To Send DTE
5 106 Clear To Send DCE
6 107 Data Set Ready DCE
7 102 Signal Ground
8 109 Data Carrier Detect DCE
9 -19 Not used
20 108/2 Data Terminal Ready DTE
21-25 Not used

The Hardware
80-10200000-01 2–5
2.4 X21 and V35 Interface Links
JP 1 connects Signal Ground (SG) to Protective Ground (PG) for the
SBU128.
All links are found on the interface pcb.
2.4.1 X21 USER/LINK Pin 1 Definition
Pin 1 on the 15-way X21 USER and LINK connectors can be connected
to Protective Ground (PG) using pcb links.
Shorting Link Pin definition
JP1 SG - PG
JP7 User port pin 1 to PG
JP8 Link port pin 1 to PG
2.4.2 V35 USER/LINK Pin 1 Definition
Pin ‘A’ on the V35 USER and LINK connectors can be connected to
Protective Ground using pcb links.
Shorting Link Pin definition
JP1 SG - PG
JP2 User port pin 1 to PG
JP3 Link port pin 1 to PG
2.4.3 X21 Receiver Terminations
The following links when fitted, apply a 120 ohm termination to the V11
receivers as follows:-
Shorting Link Interface Circuit
JP2 User T
JP3 User C
JP4 Link R
JP5 Link I
JP6 Link S
2.4.4 V35 Receiver Terminations
Receiver termination resistors are fitted on these interfaces, and cannot
be deselected.

SBU128 User Manual
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2.4.5 ISDN
The following links when fitted to the ISDN pcb, apply a 100 ohm
termination to the ISDN transmit and receive pairs as follows:-
Shorting Link Pair
JP1 Receive
JP2 Transmit
These links may need to be inserted when a longer S-bus line length is
used.
2.5 Command Terminal Access
Software configuration and control of your SBU128 is achieved via the
Command port on the rear panel, using a local terminal, modem or PC.
The port is configured as a physical DCE, the terminal standard is
VT100, with data transfer at 9600 bit/s, no parity, 8 data bits, 1 start and
1 or 2 stop bits. This data rate can be altered by software command. No
terminal emulation is used.
There is no hardware configuration to the Command port.
2.6 Non Volatile Options
These options are “non-volatile” because they are not defaulted when a
factory default is performed. However the first “A” option in each sub-
menu is the preferred setting that is naturally set (by virtue of all “1”s in
the RAM locations) when the unit is built, unless specifically changed for
the country of destination.
2.6.1 Product and Network Variants
Different operational modes can be selected with the Product Variants
menu. Different Network Variants can be selected allowing several
different countries and product variants to use the same software held in
FLASH memory.
Both these variants can be changed via the Non Volatile Options menu,
obtainable by typing the letter ‘K’ at the top level menu. The correct
variants are set for the destination country and application before
shipping.

The Hardware
80-10200000-01 2–7
All Non Volatile Options are set during manufacture and must
not be changed, except by a competent engineer.
Network Variant 0 is for most European networks, most other countries
with Euro-ISDN are likely to require Network Variant 0. Network
Variant 2 is the same as Variant 0 except that it does not have single
octet information elements present in the call setup message.
Please contact your Technical Support for further information.
NOTE: Network Variants 1 onwards must not be set in the UK,
otherwise the Approval of this product will be invalidated.
Changes to this setting must only be made by a competent
engineer.
2.6.2 S-Bus Power Detection
S-Bus Power Detection must be enabled for all UK and European ISDN
applications, where ‘Power Source 1’ detection is a regulatory
requirement. Where ‘Power Source 1’ is not provided (i.e. on some PBX
internal ISDN extensions), S-Bus Power Detection should be disabled,
otherwise ISDN calls will not be possible.
Presence of ‘Power Source 1’ is where 40V DC power is applied by the
network between the transmit and receive ‘S’ bus pairs. Enabling power
source detection means that line power must be present before calls can
be made or received.
All Non Volatile Options will be set during manufacture and
must not be changed, except by a competent engineer.
It is possible that a designated “country” variant could be used in another
country if approvals in that country permit it.
If an SBU128 is upgraded with later software, please contact your local
Technical Support organisation for further information.

Front and Rear Panel Descriptions
80-10200000-01 3–1
3 Front and Rear Panel Descriptions
The SBU128 is a standalone unit designed to sit on a desktop, or a shelf
in a standard communications cabinet. All physical connections are
made by connectors on the rear panel, see Figure 3.1 and Figure 3.2
below:-
Figure 3.1 SBU128 Front panel