Cabletron Systems CyberSWITCH CSX400 User manual

CSX400 AND CSX400-DC
USER’S GUIDE

CSX400 and CSX400-DC User’s Guide i
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.
 Copyright 1997 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America
Part Number: 9032289 September 1997
Cabletron Systems LANVIEW , QuickSET , and SPECTRUM are registered trademarks, and QuickSTART , and CSX400 and
CSX400-DC 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.
DOC Notice
This digital apparatus does not exceed the ClassA 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.

Notice
ii CSX400 and CSX400-DC User’s Guide
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,YOUAREAGREEING TO BECOME BOUND BY
THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND THE LIMITATION OF WARRANTY AND
DISCLAIMER OF LIABILITY. IFYOU DO NOT AGREE TO THE TERMS OF THISAGREEMENT, PROMPTLY RETURN THE
UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.
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 CopyrightAct 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.

Notice
CSX400 and CSX400-DC User’s Guide iii
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, DAMAGES FOR LOSS OF
BUSINESS, 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.

Notice
iv CSX400 and CSX400-DC User’s Guide
DECLARATION OF CONFORMITY
Application of Council Directive(s): 89/336/EEC
73/23/EEC
91/263/EEC
Manufacturer’s Name: Cabletron Systems, Inc.
Manufacturer’s Address: 35 Industrial Way
PO Box 5005
Rochester, NH 03867
European Representative Name: Mr. J. Solari
European Representative Address: Cabletron Systems Limited
Nexus House, Newbury Business Park
London Road, Newbury
Berkshire RG13 2PZ, England
Conformance to Directive(s)/Product Standards: EC Directive 89/336/EEC
EC Directive 73/23/EEC
EC Directive 91/263/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 Name Full Name
Principal Compliance Engineer Managing Director - E.M.E.A.
___________________________________ ___________________________________
Title Title
Rochester, NH, USA Newbury, Berkshire, England
___________________________________ ___________________________________
Location Location

CSX400 and CSX400-DC User’s Guide v
Contents
CHAPTER 1 INTRODUCTION
Related Documentation ..................................................................................1
How to Use This Guide...................................................................................1
Document Conventions...................................................................................3
Getting Help....................................................................................................4
CHAPTER 2 ABOUT THE CSX400
CSX400 Hardware..........................................................................................5
WAN Connection......................................................................................5
Ethernet LAN Connection.........................................................................7
Remote Management Capabilities..................................................................7
Optional Features ...........................................................................................8
CSX400 Firmware Support.............................................................................8
IEEE 802.3 Ethernet.................................................................................8
WAN Protocols.........................................................................................9
Firmware Data Compression..................................................................10
Inverse Multiplexing (IMUX) ...................................................................10
HDLC......................................................................................................11
DHCP and NAT......................................................................................11
Point-to-Point Protocol (PPP).................................................................12
PAP and CHAP Security ........................................................................12
LQM........................................................................................................13
Multilink Protocol ....................................................................................13
ISDN.......................................................................................................14
ISDN Back-up.........................................................................................15
HDSL......................................................................................................16
Bridging and Routing..............................................................................16
Bridging and Routing Protocol Filtering..................................................18
System Passwords.................................................................................18
Simple Network Management Protocol (SNMP) ....................................19
Software and Firmware Upgrades..........................................................22

Contents
vi CSX400 and CSX400-DC User’s Guide
CHAPTER 3 ISDN LINE ORDERING AND CONFIGURATION
Arranging ISDN Service................................................................................23
Telephone Switch Support............................................................................24
ISDN BRI Line Configuration ........................................................................24
ISDN BRI Configurations........................................................................25
SPIDs, Directory Numbers and Telephone Numbers.............................25
Telephone Switch Parameters......................................................................26
CHAPTER 4 PLANNING FOR CSX400 ISDN CONFIGURATION
Configuration Process and Terminology.......................................................29
Collect Network Information ...................................................................30
Names and Passwords...........................................................................30
ISDN Line Information ............................................................................31
Network Information Diagrams...............................................................32
Network Information Tables....................................................................38
Sample Configuration....................................................................................42
Names and Passwords Example..................................................................47
CHAPTER 5 ETHERNET CABLING REQUIREMENTS
Network Requirements..................................................................................49
10BASE-T Twisted Pair Network............................................................50
Multimode Fiber Optic Network ..............................................................51
Single Mode Fiber Optic Network...........................................................52
10BASE2 Coaxial Cable Network ..........................................................53
Transceiver Requirements .....................................................................53
CHAPTER 6 INSTALLATION
Unpacking the CSX400.................................................................................55
Guidelines for Installations............................................................................55
Installing Interface Modules ..........................................................................56
Installing Ethernet Port Interface Modules (EPIMs)................................56
Removing the CSX400 Cover ................................................................58
Removing the CSX400-DC Cover..........................................................59
Installing WAN Port Interface Modules (WPIMs)....................................60

Contents
CSX400 and CSX400-DC User’s Guide vii
CSX-COMP/ENCR Installation .....................................................................62
Installing the CSX400....................................................................................63
Tabletop and Shelf Installations .............................................................63
CSX400 and CSX400-DC Rackmount Installation.................................64
Connecting the CSX400 to the Power Source..............................................68
Connecting the CSX400-DC to the Power Source........................................69
CHAPTER 7 CSX400 CONFIGURATION WITH QuickSET
Ethernet Configuration..................................................................................74
Ethernet 1 and 2 Configuration Window.................................................74
Wide Area 1 and 2 Configuration..................................................................79
Wide Area T1 Configuration Window .....................................................80
Wide Area E1 Configuration Window .....................................................83
Wide Area DI Configuration Window......................................................85
Wide Area Synchronous Configuration Window.....................................88
Wide Area DDS Configuration Window..................................................91
Wide Area HDSL Configuration Window................................................93
Wide Area Frame Relay Time Slot Configuration Window.....................95
Wide Area PPP Time Slot Configuration Window ..................................96
Wide Area HDSL Time Slot Configuration Window................................98
Bridging and Routing Configuration..............................................................99
Bridging and Routing Configuration Window..........................................99
Bridging and Routing (WAN Frame Type) Configuration Window........105
Routing Configuration Window.............................................................107
IP Routing Configuration ......................................................................108
IPX Routing Configuration....................................................................108
Advanced Routing Configuration Window............................................111
QuickSET Pull-Down Menus.......................................................................117
File Menu..............................................................................................117
Firmware Upgrade Menu......................................................................119
Advanced Configuration Menu .............................................................122
Compression and Congestion Window ................................................123

Contents
viii CSX400 and CSX400-DC User’s Guide
CHAPTER 8 GENERAL CONFIGURATION USING LOCAL MANAGEMENT
Chapter Organization..................................................................................125
Local Management Overview......................................................................126
Management Agent ..............................................................................126
Local vs. Remote Management............................................................126
Local Management Screen Elements...................................................127
Local Management Keyboard Conventions..........................................129
Navigating Within Local Management Screens....................................130
Establishing a TELNET Connection .....................................................131
Local Management Screen Hierarchy ..................................................131
Accessing Local Management....................................................................132
Using the Menu Screens ......................................................................132
Main Menu Screen ...............................................................................133
Setup Menu Screen..............................................................................134
System Level Screen..................................................................................135
Setting the System Date.......................................................................138
Setting the System Time ......................................................................138
Setting the Host IP Address .................................................................139
Setting the Subnet Mask ......................................................................139
Setting the Default Gateway.................................................................139
Setting the Default Interface.................................................................140
SNMP Community Names Screen..............................................................141
Community Name Access Policy..........................................................141
Setting SNMP Community Names .......................................................142
SNMP Traps Screen...................................................................................143
Trap Table Screen Fields .....................................................................143
Setting the SNMP Trap Destination......................................................144
Flash Download Screen..............................................................................145
Selecting a Flash Download Method....................................................146

Contents
CSX400 and CSX400-DC User’s Guide ix
Bridge Setup Screen...................................................................................149
Bridge Setup Screen Fields..................................................................149
Selecting a Spanning Tree Protocol.....................................................150
Selecting the Bridge Port Administrative Status...................................150
Selecting the Bridge Port Pair Administrative Status............................151
Router Setup Screen...................................................................................152
Router Setup Fields..............................................................................152
IP Configuration Screen..............................................................................153
IP Configuration Screen Fields.............................................................153
IP General Config Screen.....................................................................154
IP General Configuration Status Fields ................................................154
IP General Configuration Fields ...........................................................155
Enabling the RIP Routing Protocol on a Port .......................................160
IPX Configuration Screen............................................................................162
IPX Configuration Fields.......................................................................162
IPX General Configuration Screen .......................................................163
IPX General Configuration Status Fields..............................................163
IPX General Configuration Fields.........................................................164
IPX Routing over Frame Relay.............................................................167
Enabling the IPX SAP Routing Protocol on a Port ...............................168
Enabling RIP on a Port.........................................................................170
WAN Setup .................................................................................................172
WAN Physical Configuration Screen Fields .........................................173
WAN Interface Configuration Screen..........................................................174
WAN Interface Configuration Screen Fields.........................................174
CHAPTER 9 MIB NAVIGATOR
Chapter Organization..................................................................................177
MIB Navigator Screen.................................................................................178
Managing Device MIBs.........................................................................178
MIB Navigator Command Set Overview .....................................................179
Conventions for MIB Navigator Commands .........................................180
Navigation Commands................................................................................181
Other Commands........................................................................................190
Special Commands.....................................................................................203

Contents
x CSX400 and CSX400-DC User’s Guide
CHAPTER 10 TROUBLESHOOTING
Troubleshooting CSX400 Hardware ...........................................................208
Power (PWR) LED is OFF....................................................................208
Processor (CPU) LED is OFF...............................................................208
Processor (CPU) LED is RED ..............................................................208
Troubleshooting the LAN ............................................................................208
Collision (CLN) LED is RED .................................................................208
Link (LNK) LED is OFF.........................................................................208
Troubleshooting the WAN...........................................................................209
Link (LNK) LED is OFF.........................................................................209
Link (LNK) LED is RED ........................................................................209
Link (LNK) LED is AMBER ...................................................................209
Status 1 (STS1) LED is OFF ................................................................209
Status 1 (STS1) LED is RED................................................................210
Status 1 (STS1) LED is AMBER...........................................................211
Status 1 (STS1) LED is GREEN...........................................................211
Status 2 (STS2) LED is OFF ................................................................212
Status 2 (STS 2) LED is RED WPIM-HDSL Installed in CSX400.........213
Status 2 (STS2) LED is AMBER...........................................................213
Status 2 (STS2) LED is GREEN...........................................................213
Test (TST) LED is AMBER (blinking) ...................................................214
Investigating Software Configuration Problems..........................................214
Connection to Device Fails During Software Configuration..................214
User Cannot Communicate with Remote Network Station...................215
APPENDIX A EPIM SPECIFICATIONS
Introduction .................................................................................................217
EPIM-T........................................................................................................217
EPIM-F1 and EPIM-F2................................................................................218
EPIM-F3......................................................................................................220
EPIM-C........................................................................................................221
Connector Type....................................................................................221
Grounding.............................................................................................221
EPIM-A and EPIM-X (AUI Port) ..................................................................222

Contents
CSX400 and CSX400-DC User’s Guide xi
APPENDIX B WPIM CABLE SPECIFICATIONS
WPIM-T1.....................................................................................................223
WPIM-SY ....................................................................................................225
EIA-449.................................................................................................226
V.35 ......................................................................................................227
EIA-232.................................................................................................229
X.21 ......................................................................................................230
EIA-530, EIA-530 ALT A, EIA-530 A, and EIA-530 A ALT A................231
WPIM-DDS..................................................................................................233
WPIM-E1.....................................................................................................234
WPIM-DI......................................................................................................236
WPIM-HDSL................................................................................................237
WPIM-S/T....................................................................................................238
APPENDIX C SPECIFICATIONS AND STANDARDS COMPLIANCE
CSX400, CSX400-DC, and WPIM Environmental Requirements...............239
CSX400 Specifications and Compliance Standards...................................239
CSX400-DC Specifications and Compliance Standards.............................240
CSX400 and CSX400-DC Regulatory Compliance.....................................240
CSX400-DC Regulatory Compliance (Only)...............................................240
Individual WPIM Regulatory Compliance....................................................241
WPIM-TI ...............................................................................................241
WPIM-SY..............................................................................................242
WPIM-DDS...........................................................................................242
WPIM-E1 ..............................................................................................243
WPIM-DI...............................................................................................243
WPIM-S/T.............................................................................................243
WPIM-HDSL.........................................................................................244
APPENDIX D NETWORK INFORMATION WORKSHEETS
APPENDIX E FCC PART 68 - USER’S INFORMATION FOR CSX400 AND CSX400-DC
APPENDIX F GLOSSARY
INDEX

Contents
xii CSX400 and CSX400-DC User’s Guide

CSX400 and CSX400-DC User’s Guide 1
1 Introduction
Welcome to the Cabletron Systems CSX400 and CSX400-DC User’s Guide . This guide provides
basic configuration information, hardware specifications and troubleshooting tips for the CSX400
and CSX400-DC. This guide also provides background information about 10BASE-T Ethernet
Local Area Networks (LANs) and guidelines for routing and bridging over Wide Area Networks
(WANs).
Related Documentation
Use the READ ME FIRST! document included with the CSX400 to set up your computer before
starting configuration.
Use the Cabletron Systems QuickSTART Guide (the CD insert of the QuickSET CD case) to
install the CSX400.
Use the appropriate Cabletron Systems WPIM Local Management Guide to connect your CSX400
to a WAN using a TELNET connection.
How to UseThis Guide
This guide along with the READ ME FIRST! document and the QuickSTART Guide provide the
necessary information to install and configure the CSX400. Read all of these documents before
installing the CSX400.
This guide is organized as follows:
Chapter 1 , Introduction , details document conventions and provides information on getting help.
Chapter 2 , About the CSX400 , describes the hardware components and software protocols and
features.
NOTE
The CSX400 and CSX400-DC have identical features and functions with the exception
of their power source connection.The CSX400 connects to an ac power source and
the CSX400-DC connects to a dc power source.Both the CSX400 and the
CSX400-DC are referred to as the CSX400, unless otherwise specified in this guide.

Introduction
2 CSX400 and CSX400-DC User’s Guide
Chapter 3 , ISDN Line Ordering and Configuration , provides the information you need to order
ISDN service from the telephone company.
Chapter 4 , Planning for CSX400 ISDN Configuration , describes the router configuration
process.
Chapter 5 , Ethernet Cabling Requirements ,describes the basic cabling requirements for an
Ethernet Local Area Network (LAN).
Chapter 6 , Installation ,provides detailed installation instructions for attaching the CSX400 and
CSX400-DC to a network.
Chapter 7 , CSX400 Configuration with QuickSET ,provides instructions on connecting the
CSX400 to a Wide Area Network (WAN) using Cabletron Systems
QuickSET management utility.
Chapter 8 , General Configuration Using Local Management ,provides instructions for
configuring the CSX400 through a TELNET connection.
Chapter 9 , MIB Navigator , explains how to use the MIB Navigator utility.
Chapter 10 , Troubleshooting ,provides detailed troubleshooting tips using the LANVIEW LEDs
on the CSX400.
Appendix A , EPIM Specifications , provides hardware specifications and pinout information for
available Cabletron Systems Ethernet Port Interface Modules (EPIMs).
Appendix B , WPIM Cable Specifications , provides part number and connector information for
WPIMs.
Appendix C , Specifications and Standards Compliance , contains hardware specifications and
safety and compliance standards for the CSX400.
Appendix D , Network Information Worksheets , provides blank network information
worksheets.
Appendix E , FCC Part 68 - User’s Information For CSX400 and CSX400-DC , provides
instructions required to comply with FCC Rules, Part 68.
Appendix F , Glossary , defines commonly used terms.

Introduction
CSX400 and CSX400-DC User’s Guide 3
Document Conventions
The following conventions are used throughout this guide:
NOTE
Note symbol. Calls the reader’s attention to any item of information that may be of
special importance.
TIP
Tip symbol. Conveys helpful hints concerning procedures or actions.
!
CAUTION
Caution symbol. Contains information essential to avoid damage to the equipment.
Electrical Hazard Warning symbol.Warns against an action that could result in
personal injury or death due to an electrical hazard.
WARNING
Warning symbol.Warns against an action that could result in personal injury or death.

Introduction
4 CSX400 and CSX400-DC User’s Guide
Getting Help
If you need additional support related to this device, or if you have any questions, comments, or
suggestions concerning this manual, contact the Cabletron Systems Global Call Center:
Before calling the Cabletron Systems Global Call Center, have the following information ready:
•Your Cabletron Systems service contract number
•A description of the failure
•A description of any action(s) already taken to resolve the problem (e.g., changing mode
switches, rebooting the unit, etc.)
•The serial and revision numbers of all involved Cabletron Systems products in the network
•A description of your network environment (layout, cable type, etc.)
•Network load and frame size at the time of trouble (if known)
•The device history (i.e., have you returned the device before, is this a recurring problem, etc.)
•Any previous Return Material Authorization (RMA) numbers
Phone [phone]
Internet mail suppor[email protected]
FTP ctron.com (134.141.197.25)
Login anonymous
Password your email address
BBS [phone]
Modem setting 8N1: 8 data bits, No parity, 1 stop bit
For additional information about Cabletron Systems or our products,
visit our World Wide Web site: http://www.cabletron.com/
For technical support, select Service and Support.

CSX400 and CSX400-DC User’s Guide 5
2 About the CSX400
The CSX400 (Figure 1) is an access device that provides Ethernet Local Area Network (LAN)
connectivity via two Ethernet Port Interface Modules (EPIMs), and offers high-speed Wide Area
Network (WAN) access to remote sites via two WAN Port Interface Modules (WPIMs). The
CSX400 supports IEEE 802.1d transparent bridging, IP and IPX routing, ISDN, Dynamic Host
Configuration Protocol (DHCP), Network Address Translation (NAT) routing, and Inverse
Multiplexing (IMUX) between Ethernet LANs across a WAN.
The CSX400 operates from a standard ac power source and the CSX400-DC operates from a dc
voltage source to meet all the requirements for installation into Telephone Central Office facilities.
Figure 1 The CSX400
CSX400 Hardware
This section details the CSX400 hardware capabilities.
WAN Connection
The CSX400 supports Point-to-Point Protocol (PPP) including: Link Control Protocol (LCP),
BNCP, IPCP, IPXCP, LQM, Multilink Protocol (MP) and CHAP and PAP, ISDN-BRI and Frame
Relay protocols through one of the following WAN port interface modules (WPIMs):
•The WPIM-T1 provides a T1 interface through a front panel RJ45 port and includes a built-in
Channel Service Unit/Digital Service Unit (CSU/DSU) for direct connection to a T1 line. The
WPIM-T1 provides both Full T1 or Fractional T1 using 56 or 64 Kbps Time Slots, with a total
throughput of up to 1.544 Mbps.

About the CSX400
6 CSX400 and CSX400-DC User’s Guide
•The WPIM-Sync provides a synchronous serial connection of up to 2.048 Mbps to external
communications equipment (e.g., a multiplexer or CSU/DSU). The WPIM-Sync uses a
subminiature 26-pin connector that supports the electrical signal interfaces listed below.
Appendix B, provides complete part number and cable pinout information for the following
electrical signal interfaces:
•EIA-RS449
•V.35
•EIA-RS232D
•X.21
•EIA-RS530
•EIA-530A
•RS530 ALT A
•RS530A ALT A
•The WPIM-DDS provides a 56 Kbps or 64 Kbps Digital Data Service (DDS) connection. The
WPIM-DDS supports remote CSU diagnostic or 64 Kbps clear channel loopback and
non-latching remote DSU diagnostic loopback.
•The WPIM-E1 provides an E1 interface through a front panel RJ45 port and includes a built-in
CSU/DSU for direct connection to an E1 line. The WPIM-E1 provides both Full E1 or
Fractional E1 using 56 or 64 Kbps Time Slots with a total throughput of up to 2 Mbps.
•The WPIM-DI provides a T1 interface through a front panel RJ45 port and includes a built-in
CSU/DSU for direct connection to a T1 line.TheWPIM-DI provides both FullT1 or Fractional
T1 using 56 or 64 Kbps Time Slots and also provides a second Drop-and-Insert interface, which
allows more than one device, such as a PBX, to share a single T1 connection.
•The WPIM-S/T provides an Integrated Services Digital Network (ISDN) 128 Kbps Basic Rate
Interface (BRI) for the CSX400. The WPIM-S/T provides an ISDN back-up link for a remote
site or branch office when the main WPIM for a frame relay or leased line loses a connection
or becomes disabled. An NT-1 adapter is necessary for this interface in the United States.
•The WPIM-HDSL provides a connection for users in a campus environment, or have access to
local subscriber loops, who want to send their data over their existing telephone lines, that may
run between floors, buildings, or other physical structures, at rates of up to 1.544Mbps. HDSL
supports line lengths of up to 3, 657 meters (12,000 feet) over 24American Wire Gauge (AWG)
Unshielded Twisted Pair (UTP) cabling.