Cabletron Systems SSIM-A2-01 User manual

SSIM-A2-01/SSIM-A8-01
ATM 155
SmartStack Interface Modules
Installation
and
User Guide

i
Notice
NOTICE
Cabletron Systems reserves the right to make changes in specifications and other information contained in this
document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether
any such changes have been made.
The hardware, firmware, or software described in this manual is subject to change without notice.
IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDIRECT,
SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO
LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION
CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR
SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.
1999 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America
Order Number: 9032990-01 October 1999
(OC-7062 v.1.1, 710001815)
Cabletron Systems, SPECTRUM, LANVIEW, and MicroMMAC are registered trademarks and
SmartSwitch and SmartStack are trademarks of Cabletron Systems, Inc.
All other product names mentioned in this manual may be trademarks or registered trademarks of their
respective companies.
FCC NOTICE
This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1)
this device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment uses, generates, and
can radiate radio frequency energy and if not installed in accordance with the operator’s manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to
cause interference in which case the user will be required to correct the interference at his own expense.
WARNING: Changes or modifications made to this device which are not expressly approved by the party
responsible for compliance could void the user’s authority to operate the equipment.

ii
Notice
INDUSTRY CANADA NOTICE
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out
in the Radio Interference Regulations of the Canadian Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux
appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le
ministère des Communications du Canada.
VCCI NOTICE
This is a Class A product based on the standard of the Voluntary Control Council for Interference by
Information Technology Equipment (VCCI). If this equipment is used in a domestic environment, radio
disturbance may arise. When such trouble occurs, the user may be required to take corrective actions.
CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT
IMPORTANT: Before utilizing this product, carefully read this License Agreement.
This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets
forth your rights and obligations with respect to the Cabletron software program (the “Program”) contained in
this package. The Program may be contained in firmware, chips or other media. BY UTILIZING THE
ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS
AGREEMENT, WHICH INCLUDES THE LICENSE AND THE LIMITATION OF WARRANTY AND
DISCLAIMER OF LIABILITY. IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT,
PROMPTLY RETURN THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL
REFUND.

iii
Notice
CABLETRON SOFTWARE PROGRAM LICENSE
1. LICENSE. You have the right to use only the one (1) copy of the Program provided in this package subject
to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as permitted by the Copyright Act
of the United States or as authorized in writing by Cabletron.
2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the Program.
3. APPLICABLE LAW. This License Agreement shall be interpreted and governed under the laws and in the
state and federal courts of New Hampshire. You accept the personal jurisdiction and venue of the New
Hampshire courts.
EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITY
1. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in writing,
Cabletron makes no warranty, expressed or implied, concerning the Program (including its documentation
and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO YOU BY
CABLETRON IN WRITING, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS,
AND ANY ACCOMPANYING HARDWARE.
2. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL CABLETRON OR ITS
SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT
LIMITATION, DAMAGESFORLOSS OFBUSINESS, PROFITS, BUSINESS INTERRUPTION,LOSS
OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE
DAMAGES, OR OTHER LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS
CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR
LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE
DURATION OR LIMITATION OF IMPLIED WARRANTIES, IN SOME INSTANCES THE ABOVE
LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS
The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software”
submitted with restricted rights in accordance with Section 52227-19 (a) through (d) of the Commercial
Computer Software - Restricted Rights Clause and its successors, and (c) in all respects is proprietary data
belonging to Cabletron and/or its suppliers.
For Department of Defense units, the product is licensed with “Restricted Rights” as defined in the DoD
Supplement to the Federal Acquisition Regulations, Section 52.227-7013 (c) (1) (ii) and its successors, and use,
duplication, disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) of the
Rights in Technical Data and Computer Software clause at 252.227-7013. Cabletron Systems, Inc., 35 Industrial
Way, Rochester, New Hampshire 03867-0505.

iv
Notice
DECLARATION OF CONFORMITY
Application of Council Directive(s):89/336/EEC
73/23/EEC
Manufacturer’s Name:Cabletron Systems, Inc.
Manufacturer’s Address: 35 Industrial Way
PO Box 5005
Rochester, NH 03867
European RepresentativeName: Mr. J. Solari
European RepresentativeAddress: Cabletron Systems Limited
Nexus House,Newbury Business Park
London Road, Newbury
Berkshire RG13 2PZ, England
Conformance to Directive(s)/ProductStandards:EC Directive 89/336/EEC
EC Directive 73/23/EEC
EN 55022
EN 50082-1
EN 60950
Equipment Type/Environment: Networking Equipment, for use in a Commercial
or Light Industrial Environment.
We the undersigned, hereby declare, under our sole responsibility, that the equipment packaged with this
notice conforms to the above directives.
Manufacturer Legal Representative in Europe
Mr. Ronald Fotino Mr. J. Solari
______________________________________________________________________
Full NameFull Name
PrincipalComplianceEngineer ManagingDirector -E.M.E.A.
______________________________________________________________________
Title Title
Rochester, NH, USANewbury, Berkshire,England
______________________________________________________________________
Location Location

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SmartStack SSIM-A2-01/SSIM-A8-01
Table of Contents
1. Introduction 1
2. Installation 3
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rules to Remember . . . . . . . . . . . . . . . . . . . . . . . . 4
Frame Length Limit. . . . . . . . . . . . . . . . . . . . . . . 4
One VAP per Uplink per VLAN. . . . . . . . . . . . . . . . . 5
Spanning Tree . . . . . . . . . . . . . . . . . . . . . . . . . 6
Configuration Data . . . . . . . . . . . . . . . . . . . . . . . 6
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . 7
Hardware Installation. . . . . . . . . . . . . . . . . . . . . . . . 8
Software Installation . . . . . . . . . . . . . . . . . . . . . . . . 9
TFTP Download . . . . . . . . . . . . . . . . . . . . . . . . 9
Serial Download . . . . . . . . . . . . . . . . . . . . . . . 10
Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Testing the Module . . . . . . . . . . . . . . . . . . . . . . . . 13
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Default Configuration. . . . . . . . . . . . . . . . . . . . . 14
3. Console Configuration 15
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
General Guidelines. . . . . . . . . . . . . . . . . . . . . . . . 16
Navigating within the Menus . . . . . . . . . . . . . . . . . 17
ATM Configuration - Port Menu . . . . . . . . . . . . . . . . . 18
ATM Network Configuration . . . . . . . . . . . . . . . . . 19
ATM Network Advanced Parameters . . . . . . . . . . . . 22
ATM LEC Main Configuration Screen . . . . . . . . . . . . 26
Traffic Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Traffic Profile Mapping Configuration . . . . . . . . . . . . 31
ATM LANE Parameters Configuration . . . . . . . . . . . . 32
ATM LEC PVC Configuration . . . . . . . . . . . . . . . . 37
ATM Traffic Profile Configuration. . . . . . . . . . . . . . . 38
4. Statistics 41
Statistics Menu . . . . . . . . . . . . . . . . . . . . . . . . 42
Port Status . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Port Statistics. . . . . . . . . . . . . . . . . . . . . . . . . 44
General ATM Statistics. . . . . . . . . . . . . . . . . . . . 45
LEC Statistics . . . . . . . . . . . . . . . . . . . . . . . . 47

vi
SmartStack SSIM-A2-01/SSIM-A8-01
Frame-Forwarding Statistics. . . . . . . . . . . . . . . . . . 48
LANE Status. . . . . . . . . . . . . . . . . . . . . . . . . . 52
Server VCC Table . . . . . . . . . . . . . . . . . . . . . . . 55
LE-ARP Table . . . . . . . . . . . . . . . . . . . . . . . . . 56
Route Descriptor Table . . . . . . . . . . . . . . . . . . . .57
LEC VCC Statistics . . . . . . . . . . . . . . . . . . . . . .58
VCC Statistics . . . . . . . . . . . . . . . . . . . . . . . . . 59
5. Getting in Touch with Technical Support 61
Appendix A. Abbreviations 63
Appendix B. Log Messages 65

vii
SmartStack SSIM-A2-01/SSIM-A8-01
List of Figures
Figure 1. SSIM-A2-01 Uplink (right) and SSIM-A8-01 Uplink (left). . . . 1
Figure 2. Unsupported Configuration . . . . . . . . . . . . . . . . . . 5
Figure 3. Connecting One Switch to Two VAPs . . . . . . . . . . . . . 5
Figure 4. Connecting VLANs to ATM. . . . . . . . . . . . . . . . . . . 6
Figure 5. Removing the Expansion Slot Cover. . . . . . . . . . . . . . 8
Figure 6. Installing the SSIM-Ax-01 Module . . . . . . . . . . . . . . . 8
Figure7. Contacting LAN Emulation Services . . . . . . . . . . . . . 33
List of Tables
Table 1. Maximum Frame Sizes . . . . . . . . . . . . . . . . . . . . . 4
Table 2. Status LEDs and their Meanings . . . . . . . . . . . . . . . 12
Table 3. ATM Interface LEDs and their Meanings . . . . . . . . . . . 12
Table 4. Normal LED State. . . . . . . . . . . . . . . . . . . . . . . 13

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SmartStack SSIM-A2-01/SSIM-A8-01
Summary of Contents
Following isa short descriptionof thecontentof the chapters and appendixes inthis
publication:
Chapter 1, “Introduction”, is a general introduction to the SSIM-A2-01 ATM
155 Uplink UTP5 module and the SSIM-A8-01 ATM 155 Uplink MMF module.
Chapter 2, “Installation”, lists the SSIM-Ax-01 module package contents,
explains module installation and cabling, describes the front panel LEDs, and
explains configuration and testing of the module.
Chapter 3, “Console Configuration”, deals with setting up and configuring the
SSIM-Ax-01 module using a direct console connection.
Chapter 4, “Statistics”, lists and explains the statistics that are available for the
SSIM-Ax-01 module.
Chapter 5, “Getting in Touch with Technical Support”, lists Cabletron
Systems’s support services such as hotline support, fax support and the support
web, as well as other services such as the bulletin board service, FTP server and
e-mail.
Appendix A, “Abbreviations” contains a list of the abbreviations used in this
publication.
Appendix B, “Log Messages” lists possible error messages for the
SSIM-Ax-01 module.
❏

1
SmartStack SSIM-A2-01/SSIM-A8-01 Introduction
1. Introduction
The SmartStack SSIM-A2-01 and SmartStack SSIM-A8-01 ATM 155 Uplink
Modules from Cabletron Systems provide high-speed connections to the ATM
backbone for the STS16-20RM Token-Ring Switch. Designed for high
performance and lowlatency, thesemodules provide connectivitybetween existing
legacy Token Ring networks and ATM networks.
Note: References to STS16-20RM are also applicable to STS16-20FRM.
The SSIM-Ax-01 module mounts in one of the two front-panel expansion module
slots on the switch. The SmartStack SSIM-A2-01 has a UTP-5 copper shielded
RJ-45 connector interface. The SmartStack SSIM-A8-01 is available for
multimode optical fiber with duplex SC connector.
Figure 1. SSIM-A2-01 Uplink (right) and SSIM-A8-01 Uplink (left)
The modules support Token Ring LAN Emulation (LANE) 1.0, UNI 3.0/3.1/4.0
and Integrated Local Management Interface (ILMI) 4.0.
A single ATM interface can emulate up to 63 Virtual ATM Ports (VAPs), each
implementing a separate LANE bridge (LANE proxy client). Virtual ATM ports
support nearly all of the features of standard Token Ring ports, and are configured
just like any other Token Ring port. Extra configuration options are available for
configuring the LAN emulation and ATM interface options.
The bandwidth of the ATM interface is shared among multiple VAPs.
Additionally, advanced traffic configuration facilities eliminate transmit overloads
and permit the optimization of bandwidth usage.
❏

2
SmartStack SSIM-A2-01/SSIM-A8-01 Introduction

3
SmartStack SSIM-A2-01/SSIM-A8-01 Installation
2. Installation
This chapter contains instructions for installing, connecting and testing the SSIM-
Ax-01 module.
This chapter contains the following information:
•Package Contents
•Rules to Remember
•Installation Procedure
•Hardware Installation
•Software Installation
•Cabling
•LEDs
•Testing the Module
•Configuration
Package Contents
Your SSIM-Ax-01 package contains the following items:
•One SSIM-A2-01 ATM 155 Uplink UTP5 or
One SSIM-A8-01 ATM 155 Uplink MMF
•One CD-ROM containing the Token Ring switch programs and the Switch
Manager for Windows and HP OpenView for Windows as well as user
documentation in pdf format.
•One SSIM-A2-01/SSIM -A8-01 ATM 155 Uplink—Installation and User Guide
(this document)

4
SmartStack SSIM-A2-01/SSIM-A8-01 Installation
Rules to Remember
This section will help you understand the configuration restrictions for the SSIM-
Ax-01 ATM 155 Uplink Module. In brief, you must remember the following rules
when planning to install the uplink:
•Only one VAP per uplink per VLAN
•If you create parallel paths directly between switches, spanning tree must be
enabled
•Configuration data follows the switch slot, not the uplink module
Frame Length Limit
When attaching to an ATM network with LANE, possible ATM frame sizes are
1516, 4544, 9234 and 18190 bytes.
The LANE frame size (ATM Forum: C3) is defined as including the two byte ATM
LANE overhead, but without the 4 bytes Token Ring CRC. This gives the
following relationship to the size of frames any “real” Token Ring station should
be using.
You must configure your Token Ring stations to a maximum frame size as above,
or to a lower value. Some protocols will negotiate frame sizes end-to-end, some
will only recognize frame size settings between end-stations, and yet others will
only use the frame size of the transmitting interface. If you configure the frame size
of all Token-Ring stations, all protocols will work.
TR-LANE Max
Data Frame Size Token-RingMax Frame Size
1516 1514
4544 4542
Table 1. Maximum Frame Sizes

5
SmartStack SSIM-A2-01/SSIM-A8-01 Installation
One VAP per Uplink per VLAN
The SSIM-Ax-01 module does not allow configurations in which the following
frame operations take place within a single uplink module:
•Bridging from ATM back to ATM.
•Broadcasting a frame from Token Ring to more than one ATM ELAN.
These operations would occur if the uplink module provided more than one VAP
per VLAN. Therefore, the configuration shown in Figure 2 is not supported.
Figure 2. Unsupported Configuration
If you want to connect the same STS16-20RM Token Ring Switch to ATM via
more than one VAP, the VAPs must reside on different ATM uplink modules, as
shown in Figure 3.
Figure 3. Connecting One Switch to Two VAPs

6
SmartStack SSIM-A2-01/SSIM-A8-01 Installation
If you connect to the same ATM ELAN more than once from the same VLAN, you
are using parallel bridges. When doing so, you must always enable the Spanning
Tree function for all the CRFs that have parallel paths.
With more than one uplink, you can connect more VLANs to ATM while at that
same time creating backup connections. Figure 4 shows two uplink modules, each
connected to two ATM ELANs. The lighter arrow shows the parallel path in the
spanning tree “blocked” state (the path is on “standby”).
Figure 4. Connecting VLANs to ATM
Spanning Tree
If you create parallel paths in your network topology, but fail to enable the spanning
tree protocol, you risk “broadcast storms” that can disrupt your entire network. To
enable spanning tree, see section “Spanning Tree Menu” in the STS16-20RM
switch manual. The default setting for spanning tree is disabled.
Configuration Data
When you configure an uplink module in a switch, the configuration data is applied
to any uplink in that particular switch slot. This means that the configuration data
does not move with the uplink module if the module is moved to another slot or
another switch. Conversely, configuration data is retained if one uplink is replaced
with another.
Note, however, that the SSIM-Ax-01 module software image is stored in the
module itself and will follow the module when it is moved to another switch.

7
SmartStack SSIM-A2-01/SSIM-A8-01 Installation
Installation Procedure
The SSIM-Ax-01 module is packaged with software for both the module and the
base STS16-20RM Token Ring Switch. The switch is also packaged with software
for both the module and the switch. To ensure compatibility between the module
and the switch, you must install the later of the two software revisions. The switch
and module software is also available via Cabletron’s online services, such as the
Internet.
When installing the module, follow the procedure listed below:
1. Install the software in the switch. See the switch manual for instructions on
downloading software.
2. Optional: clear NVRAM in the base switch. This will erase all configuration in
the switch.
3. Reset the switch to activate the new software.
4. If you cleared NVRAM in step 2, re-establish the switch configuration. Verify
that the switch is operating correctly.
5. Turn off the switch.
6. Physically install the module in one of the two expansion slots. See section
“Hardware Installation” on page 8.
7. Turn on the switch.
8. Download the software for the module. See section “Software Installation” on
page 9.
9. If you plan to use the graphical switch manager, install it now.
10.If necessary, configure the module. For details, see section “Configuration” on
page 14 as well as Chapter 3, “Console Configuration”.

8
SmartStack SSIM-A2-01/SSIM-A8-01 Installation
Hardware Installation
Use the following steps to install the SSIM-Ax-01 module in a STS16-20RM
Token Ring Switch:
1. Power off the base switch by unplugging the power cord from the power outlet.
If the switch uses the optional SmartStack STS-PSU Redundant Power Supply
Unit, unplug the connector from the base switch as well.
2. Select an empty expansion module slot in which to install the module. You can
install the module in either or both of the slots.
3. Remove the blind plate covering the expansion module slot on the front of the
STS16-20RM by loosening the two retaining thumbscrews (Figure 5). Keep the
plate for use in the event that the expansion module is removed.
Figure 5. Removing the Expansion Slot Cover
➽Warning: Expansion modules are not hot-swappable. If you install or remove
expansion modules while the power to the switch is on, damage may occur to the
switch and to the module.
4. Carefully insert the module into the rails on each side of the expansion slot,
sliding it back until the connector on the module is seated into the connector at
the back of the slot (Figure 6). When the module is fully seated, the module
faceplate will be flush with the front of the base switch.
Figure 6. Installing the SSIM-Ax-01 Module
5. Secure the module with the two attached thumbscrews.
6. Reapply power to the switch.

9
SmartStack SSIM-A2-01/SSIM-A8-01 Installation
Software Installation
Before you can use your SSIM-Ax-01 module, you must install the uplink module
software. The module software can be downloaded via TFTP or via a serial line.
Search the disks supplied with the module for a file namedATMyzv.bin. The letters
yzv in the file name represent the version number of the software. For example,
ATM400.bin is version 4.00 of the module software.
TFTP Download
1. Copy the software image to a suitable directory on the TFTP server.
2. From the Main menu in the console, select Download →
→→
→Upload. The
Download →
→→
→Upload menu will be displayed.
3. Select TFTP Download →
→→
→Upload. The TFTP Download →
→→
→Upload menu
will be displayed.
4. On this menu, set the IP address of the TFTP server. Also, set the download
VLAN (the BRF on which the TFTP server is located).
5. Select ATM Firmware Download. The ATM Firmware TFTP Download
screen is displayed.
6. Select ATM Firmware Download Filename and type the filename of the
software image to download.
7. Select Execute ATM Image Network Download to start the download.

10
SmartStack SSIM-A2-01/SSIM-A8-01 Installation
The console will display the download activity while the software is transferred
over the network. When the software has been transferred, you will see the
following messages:
Network download complete. Now transferring to ATM
Module(s), please wait...
Download of ATM firmware complete - ATM module(s) being
reinitialized...
The software is then burned into the module FLASH memory. The software
remains inmemory until replaced by a newer image. When thesoftware installation
is complete, the module is started for normal operation, and the following message
is displayed:
Press <RETURN> to continue...
Serial Download
1. From the main menu, select Download →
→→
→Upload. The Download →
→→
→Upload
menu is displayed.
2. Select Serial Link Download. The Serial Link Download screen is displayed.
3. Select ATM Firmware Download.
4. Using your terminal software, transfer the software image (ATMyzv.bin) to the
module using the Xmodem protocol. The transfer will take some minutes,
depending on your terminal settings and speed.
The software is then burned into the module FLASH memory. The software
remains inmemory until replaced by a newer image. When thesoftware installation
is complete, the module is started for normal operation, and the following message
is displayed:
Press <RETURN> to continue...

11
SmartStack SSIM-A2-01/SSIM-A8-01 Installation
Cabling
The cabling used depends on which version of the module you are installing.
SSIM-A2-01 ATM 155 Uplink UTP5
The SSM-A2-01 module uses standard copper UTP5 cabling. The maximum cable
length is 100 m (328 feet).
1. Insert the modular jack from either end of an RJ45 UTP-5 cable into the
connector on the SSM-A2-01 front panel.
2. Connect the other end of the cable to an ATM switch in the network.
SSIM-A8-01 ATM 155 Uplink MMF
The SSIM-A8-01 module uses multimode 62.5/125 micron fiber cabling. The
maximum cable length is 2000 m (6560 feet).
1. Connect an SC-type optic fiber to the pair of SC-type connectors on the front
panel of the module. To ensure proper connection, it may be necessary to clean
the fiber connectors with a soft tissue dipped in alcohol.
2. Connect the other end of the cable to an ATM switch in the network using the
following guidelines:
— Connect the module RX connector to the ATM switch TX port.
— Connect the module TX connector to the ATM switch RX port.
➽Note: If there is no connection between the ATM switch and the SSIM-A8-01
module (the RXSYNC LED is off), try swapping the TX and RX connectors at one
end of the cable.