3Com S330 User manual

http://www.3com.com/
®
SuperStack
®
II
PathBuilder
™
S330/S310
WAN Access Switches
Reference Guide
Release 2.04
Part No. 09-1850-000
Published August 1999

3Com Corporation
5400 Bayfront Plaza
Santa Clara, California
95052-8145
Copyright © 1999, 3Com Corporation. All rights reserved. No part of this documentation may be
reproduced in any form or by any means or used to make any derivative work (such as translation,
transformation, or adaptation) without written permission from 3Com Corporation.
3Com Corporation reserves the right to revise this documentation and to make changes in content from
time to time without obligation on the part of 3Com Corporation to provide notification of such revision or
change.
3Com Corporation provides this documentation without warranty, term, or condition of any kind, either
implied or expressed, including, but not limited to, the implied warranties, terms or conditions of
merchantability, satisfactory quality, and fitness for a particular purpose. 3Com may make improvements or
changes in the product(s) and/or the program(s) described in this documentation at any time.
If there is any software on removable media described in this documentation, it is furnished under a license
agreement included with the product as a separate document, in the hard copy documentation, or on the
removable media in a directory file named LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy,
please contact 3Com and a copy will be provided to you.
UNITED STATES GOVERNMENT LEGEND
If you are a United States government agency, then this documentation and the software described herein
are provided to you subject to the following:
All technical data and computer software are commercial in nature and developed solely at private expense.
Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995)
or as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are
provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited
rights only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is
applicable. You agree not to remove or deface any portion of any legend provided on any licensed program
or documentation contained in, or delivered to you in conjunction with, this User Guide.
3Com, the 3Com logo, and SuperStack are registered trademarks and PathBuilder is a trademark of
3Com Corporation. 3ComFacts is a service mark of 3Com Corporation.
All other company and product names may be trademarks of the respective companies with which they are
associated.

C
ONTENTS
W
ARNING
I
NFORMATION
Servicing xi
Rack Mounting xi
Power and Power Cords xii
EMI xii
Safety Classification of Ports for Connection to Telecommunications Networks xii
S
UPPLEMENTARY
R
EGULATORY
I
NFORMATION
FCC Part 68 Statement xiii
Canadian CS-03 Approval Information xiii
CE Notice xiv
A
BOUT
T
HIS
G
UIDE
Conventions 1
Related Documentation 2
1
S
YSTEM
D
ESCRIPTION
PathBuilder S330/S310 Overview 3
PathBuilder S330 Features 3
PathBuilder S310 Features 5
Application Support 7
Key Benefits 8
2
I
NSTALLATION
Receiving and Inspecting the PathBuilder S330/S310 Switch 11
Installation Overview 12
Site Requirements 14
Installation Procedures 15
Step 1 (Optional): Install the Optional Modules in the Unit 15
ESD Precautions 18
Installing the Optional Modules in the Unit 19
Step 2: Install the Unit in the Rack 24
Step 3: Connect AC or DC Power and (optionally) the RPS System 25
Installing the Optional RPS System 26
Step 4: Connect I/O Cabling 27
Connecting to the T1/E1 UNI Interface 29

Connecting to the Serial Port 30
Connecting to the Ethernet 10BASE-T Port 31
Connecting to the OC3/STM-1 Port 32
Connecting to the CBR Module 34
Connecting to the Voice Compression Module 35
Connecting to the Ethernet 10/100 Module 36
Connecting to the DS3/E3 Module 37
Connecting to the Four-Port IMA Module 38
Step 5: Connect the Management Terminal 39
3
G
ETTING
S
TARTED
Logging On 41
Using the Menus 43
Navigating Through the Menus 43
Understanding the Menu Hierarchy 44
Using the Menus to Change Settings 44
Alarm Indicator 44
Performing Initial System Configuration 45
Configuring the System Clock 45
Setting up Communication Parameters 48
Configuring the Local Host IP Parameters 49
Configuring Trap Clients 52
Configuring the Default Gateway 53
Setting the Time and Date 54
Setting up Passwords 54
Performing Additional Super User Functions 56
Taking over a Read-Write Session 56
Erasing the System Database 56
Configuring In-band Management 57
4
C
ONFIGURING
P
ATH
B
UILDER
S330/S310 M
ODULES
, P
ORTS
,
AND
A
PPLICATIONS
Viewing and Configuring System Information 59
Specifying General System Information 60
Viewing RS-232 Port Configuration Information 61
Viewing the Firmware Version 61
Downloading New Management Processor Firmware 62
Downloading Firmware Using TFTP via an Ethernet Port 62
Downloading Firmware Using FTP via an Ethernet port 63
Downloading Firmware Using Xmodem via the Serial Port 64
Backing up and Restoring the Database and Code Image 64
Backing up the Database 64
Restoring the Database 65
Backing up the Code Image 65
Restoring the Code Image 66
Updating the Flash File System 66

Resetting the Interface Card 67
Viewing an Equipment List 67
Verifying Hardware Requirements 68
Using the Configuration Management Menu 68
Using the List Card Menu 69
Configuring the Management CPU 70
Viewing MCPU Configuration Information 71
Configuring MCPU Shapers 71
Configuring the CTX 72
Configuring CTX Shapers 73
Configuring CTX Buffers 74
Setting Congestion Thresholds 76
Configuring Ports 76
Configuring the T1/E1 Interface 77
Configuring the T1/E1 Ports 77
Activation/Deactivation Bit Error Rates 79
Configuring UNI and IMA Groups 80
Adding UNI Groups 80
Adding IMA Groups 82
Viewing and Modifying IMA and UNI Groups 85
Deleting IMA and UNI Groups 85
Viewing IMA Link Status 86
Viewing IMA Group Status 89
Configuring the T1/ E1 Card 92
Configuring the OC3/STM-1 Port 93
Configuring the DS3/E3 UNI Module 94
Configuring the Serial Interface 96
Configuring the Serial Port 96
Configuring the SIM Local Management Interface 98
Configuring the Serial Card 101
Configuring the Ethernet Interface 102
Configuring the Ethernet Interface 102
Configuring the Bridge 103
Configuring the Spanning Tree 105
Configuring Source Protocol Filtering 106
Configuring Source Address Filtering 108
Configuring Destination Address Filtering 109
Viewing the List Forwarding Table 110
Constructing the Bridge Static Table 111
Configuring IP over ATM 112
Configuring the Ethernet 10/100 Module 116
Configuring the CBR Module 117
Configuring the CBR T1-DSX/E1 Port(s) 118
DS0 Trunk Conditioning 123
Configuring the CBR Serial Port 123
Configuring the CBR Card 126
Configuring the Voice Compression Module 126
Configuring VCM DS0 Channels 127

Delay and Echo Cancellation 129
Configuring the VCM T1/E1 Port 129
Configuring the VCM Card 131
Configuring Virtual Circuits 132
Supported Classes of Virtual Circuits 132
Adding Virtual Circuits 133
Adding PVC Virtual Circuits 134
Configuring CBR Circuits for DBA 138
Defining RS-366 (Video) Virtual Circuit Templates 140
Defining RS-366 “Lite” Circuits for DSX-1/E1 CBR Ports 143
Adding Voice Compression Module VCC Circuits 143
Adding VCM Subchannel Circuits 146
VCM Subchannel Virtual Circuit Example 148
Virtual Circuit Parameters 150
Common VIrtual Circuit Parameters 150
MCPU Virtual Circuit Parameters 150
T1/E1 UNI Port Virtual Circuit Parameters 151
OC3/STM-1 Port Virtual Circuit Parameters 151
Serial Port Virtual Circuit Parameters 151
Ethernet Port Virtual Circuit Parameters 154
CBR Module Virtual Circuit Parameters 154
Voice Compression Module Virtual Circuit Parameters 156
VC and VP Address Translation 156
Viewing Existing Virtual Circuits 157
Viewing Virtual Circuits for the Entire Chassis 157
Viewing Virtual Circuits by Port or Group 158
Modifying Existing Virtual Circuits 159
Deleting Virtual Circuits 160
Managing the Video Dial Feature 160
Managing Video Dial-up Sessions 161
Starting Video Dial-up Sessions 161
Ending Video Dial-up Sessions 162
Viewing the Video Call Routing Table 163
P
ATH
B
UILDER
S330 D
IAGNOSTICS AND
P
ERFORMANCE
S
TATISTICS
Managing System Alarms 165
Viewing and Clearing Current Alarms 165
PathBuilder S330/S310 Alarm Messages 166
MCPU and CTX Module (System) Alarms 167
Alarms Common to Several Interfaces 168
T1/E1 UNI with IMA Module Alarms 170
DSX-1/E1 CBR Module Alarms 175
SIM Alarms 176
Voice Compression Module Alarms 176
Working with History Alarms 177
Viewing and Printing History Alarms 177
Clearing History Alarms 177

Using Loopbacks 178
T1/E1 UNI with IMA Loopbacks 179
OC3/STM-1 Loopbacks 180
DS3 Loopbacks 181
E3 Loopbacks 181
CBR Loopbacks 182
Setting VCM Loopbacks 182
Setting VCM Port Loopbacks 183
Setting VCM Channel Loopbacks 184
Setting Tone Injection 185
Viewing Performance and ATM Statistics 185
Viewing Card Statistics 186
Viewing MCPU Card Statistics 187
Viewing T1/E1 UNI with IMA Card Statistics 187
T1/E1 Port/Link Statistics 188
T1/E1 Group Statistics 189
Viewing OC3/STM-1 Card Statistics 190
Viewing OC3/STM-1 Performance Statistics 190
Viewing OC3/STM-1 ATM Statistics 193
Viewing DS3 Card Statistics 193
Viewing DS3 UNI Performance Statistics 193
Viewing DS3 UNI ATM Statistics 194
Viewing E3 Card Statistics 194
Viewing E3 UNI Performance Statistics 194
Viewing E3 UNI ATM Statistics 195
Viewing SIM Card Statistics 195
SIM HDLC Statistics 195
SIM Frame Relay Statistics (per DLCI) 196
SIM DXI Statistics 196
SIM ATM VC Statistics (per VCI) 196
SIM LMI Statistics 197
Viewing Ethernet Card Statistics 197
Ethernet Statistics 198
Spanning Tree Statistics 200
IP over ATM Statistics 200
Ethernet ATM VC STatistics 201
Viewing CBR Module Card Statistics 201
CBR Performance Monitoring Statistics 202
CBR ATM Statistics 202
Viewing Voice Compression Module Statistics 203
Voice Compression Module Performance Monitoring Statistics 204
Voice Compression Module VC Statistics 205
Voice Compression Module Port Activity Statistics 206
Viewing Virtual Circuit Statistics 206
Viewing Virtual Circuit Statistics by Circuit 206
Viewing Virtual Circuit Statistics by Port/Group 208
Viewing Virtual Circuit Statistics by Shaper 208
Viewing Virtual Circuit Statistics by Buffer (Queue) 209

A S
YSTEM
S
PECIFICATIONS AND
P ART N UMBERS
PathBuilder S330 Specifications 213
PathBuilder S310 Specifications 218
Connector Pinouts 222
Management Interface Connector Pinouts 222
Ethernet Interface (10BASE-T and 10/100BASE-T) Connector Pinouts 222
T1/E1 UNI with IMA Interface Connector Pinouts 223
Serial Port Connector Pinouts 223
CBR Module Connector Pinouts 230
Voice Compression Module Connector Pinouts 232
Options and Parts List 232
B
P
ATH
B
UILDER
S330/S310 M
ODULE AND
A
PPLICATION
O
VERVIEW
Management CPU 235
CTX Switch 235
CTX Output Queues and Memory Partition 236
Setting up a Virtual Circuit 238
VPI and VCI Ranges 238
Early and Partial Packet Discard 238
T1/E1 UNI with IMA Interface 238
OC3/STM-1 Port 239
DS3/E3 UNI Modules 239
Serial Interface 240
Serial Interface Frame Protocol Modes 240
ATM DXI Mode 241
HDLC/SDLC Mode 245
Frame Relay Mode 246
Ethernet Interface (10BASE-T or 10/100BASE-T) 248
Bridge Operation 249
Filtering 250
Spanning Tree 250
Spanning Tree Operation 250
Spanning Tree Instances 251
Addressing 251
Segmentation 254
Reassembly 254
Typical Ethernet and Voice Application Configurations 254
CBR Module 257
Structured DS1 259
DS0 Signaling and Dynamic Bandwidth Allocation 261
Unstructured DS1 264
Structured versus Unstructured Summary 264
Video Conferencing 265
Point-to-Point Video Conferencing 265
Multi-point Video Conferencing 267
Voice Compression Module 268

Supported Voice Compression Features 269
C
ATM F
ORUM
IMA C
OMPLIANCE
D
T
ECHNICAL
S
UPPORT
Online Technical Services 277
World Wide Web Site 277
3Com Knowledgebase Web Services 277
3Com FTP Site 277
3Com Bulletin Board Service 278
Access by Analog Modem 278
Access by Digital Modem 278
3Com Facts Automated Fax Service 278
Support from Your Network Supplier 278
Support from 3Com 279
Returning Products for Repair 280
I NDEX
3C OM C ORPORATION L IMITED W ARRANTY

Servicing xi
W ARNING I NFORMATION
This section contains warning information for AC-powered systems.
CAUTION: Use of controls or adjustments of performance or procedures other
than those specified herein may result in hazardous radiation exposure.
CAUTION: Danger of explosion if battery is incorrectly replaced. Replace the
battery with only the same or equivalent type as that recommended by the
manufacturer. Dispose of used batteries according to the manufacturer’s
instructions.
Servicing Service of this unit is to be performed by qualified service personnel only.
Service of certain components and subassemblies in this equipment is
accomplished by the replacement of Field Replaceable Units (FRUs). However,
safety agency approval requires that the servicing of other subassemblies within
this product be referred to 3Com’s service personnel.
The trim enclosure and other mechanically secured plates serve as protection
barriers from potential hazardous internal areas. No attempt should be made to
troubleshoot internal components with these protective barriers removed without
first disconnecting the equipment from main power.
Rack Mounting This equipment is for use only in complete equipment where the acceptability of
the combination is determined by the applicable safety agency in the country in
which it is installed. This includes UL in the U.S.A., CSA in Canada, and TUV in
Europe.
CAUTION: Do not block the ventilation openings on the top and bottom of the
unit during installation. A minimum of 1 rack unit (1.75”) space is required.
Rack configurations with certain combinations of 3Com equipment installed in
racks with a height greater than 50” (127 cm) may require a counter-balance
weight, a stabilizer bar, or anti-tip legs to ensure rack stability in accordance with
safety agency regulations.
CAUTION: When attaching the rack-mount ears, you must use the
factory-supplied screws. Using screws other than those supplied with the
rack-mount ears voids your warranty and could damage the PCB.

xii C
HAPTER
: W
ARNING
I
NFORMATION
Power and Power
Cords
This equipment is not intended for use with IT power distribution systems whose
line to line voltage exceeds 250 VAC RMS defined by EN 60950 as having no
direct connection to earth. The PathBuilder S330/S310 switch will auto-configure
for 115 VAC or 220-240 VAC.
■
North American Applications — Use a UL Listed and CSA Certified Cord Set
rated 6 amps, consisting of a minimum 18 AWG, Type SVT or SJT three
conductor cord maximum of 15 feet in length, with a NEMA 5-15P plug.
■
International Applications — The power supply cords used with this
equipment should be harmonized with all local standards applicable in the
country in which it is installed.
Safety agency compliance requires this unit to be connected to branch circuits
with overcurrent protection
≤ 20A for North American applications and ≤ 10A for
international applications.
The power supply cord must be disconnected when servicing all components or
subsystems.
EMI
■
FCC — This equipment generates, uses, and can radiate radio frequency
energy, and if not installed and used in accordance with the instruction
manual, may cause interference to radio communications. It has been tested
and found to comply with the limits for a Class A computing device pursuant
with Part 15 of the FCC Rules, which are designed to provide reasonable
protection against such interference when operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause
interference, in which case the user at his own expense will be required to take
whatever measures may be required to correct the interference. These tests
were conducted with shielded communications cables with metal connector
hoods; the use of unshielded cables may void this compliance.
■
Canada —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.
■ Europe —This is a Class A product. In a domestic environment this product
may cause radio interference, in which case, the user may be required to take
adequate measures.
Safety Classification
of Ports for
Connection to
Telecommunications
Networks
The following port types in the product range are classified according to the
Harmonized Europeans Standard EN41003, subclause 4.1.3, as follows:
E1/E3 —TNV normally operating within SELV limits (TNV-1)
1Telecommunications Network Voltage (EN60950, subclause 1.2.8.8)
2Safety Extra-Low Voltage (EN60950, subclause 1.2.8.5)

FCC Part 68 Statement xiii
SUPPLEMENTARY REGULATORY
INFORMATION
This section describes the compliance of the SuperStack®II PathBuilder™S330 and
the SuperStack II PathBuilderS310 WAN access switches (PathBuilder S330/S310
switches) with FCC, Industry Canada, and CE regulations.
FCC Part 68 Statement This equipment complies with Part 68 of the Federal Communications
Commission (FCC) rules. On the product is a label that contains the FCC
registration number for this device. If requested, you must provide this information
to the telephone company.
This equipment is designed to be connected to the telephone network or premises
wiring using a compatible modular jack which is Part 68 compliant. See
installation instructions for details.
If this device causes harm to the telephone network, the telephone company will
notify you in advance that temporary discontinuance of service may be required.
The telephone company may request that you disconnect the equipment until the
problem is resolved. The telephone company may make changes in its facilities,
equipment, operations, or procedures that could affect the operation of this
equipment. If this happens, the telephone company will provide advance notice in
order for you to make necessary modifications to maintain uninterrupted service.
If you experience trouble with this equipment or for repair or warranty
information, please follow the applicable procedures explained in the Technical
Support section of this manual (Appendix A).
Canadian CS-03
Approval Information The Industry Canada label identifies certified equipment. This certification means
that the equipment meets certain telecommunications network protective,
operational, and safety requirements. Industry Canada does not guarantee the
equipment will operate to your satisfaction.
Before installing this equipment, you should ensure that it is permissible to be
connected to the facilities of the local telecommunications company. You must
also install the equipment using an acceptable method of connection. In some
cases, the inside wiring associated with a single line individual service may be
extended by means of a certified connector assembly. You should be aware that
compliance with the above conditions may not prevent degradation of service in
some situations.
Repairs to certified equipment should be made by an authorized Canadian
maintenance facility designated by the supplier. Any repairs or alterations you
make to this equipment, or equipment malfunctions, may give the
telecommunications company cause to request that you disconnect the
equipment.

xiv CHAPTER : SUPPLEMENTARY REGULATORY INFORMATION
CE Notice Marking by the symbol CE indicates compliance of the equipment with the EMC,
Telecom and Low Voltage dIrectives of the European Community. Such marking is
indicative that this equipment meets or exceeds the following technical standards.
■EN55022 — Limits and methods of measurement of radio interference
characteristics of information technology equipment
■EN50082-1 — Electromagnetic compatibility; generic immunity standard part
1: residential, commercial, and light industrial
■CTR 12 — Connection of 2 Mbit/s Unstructured Leased Lines
■CTR13 — Connection to 2 Mbit/s Structured Leased Lines
■EN 60950 — Safety of Information Technology Equipment including Electrical
Business Equipment
■EN 41003 — Particular safety requirements for electrical equipment to be
connected to Telecom networks
WARNING: This customer equipment is to be installed and maintained by service
personnel as defined by AS/NZS 3260 clause 1.2.14.3. (service Personnel).
Incorrect connection of connected equipment to the General Purpose Outlet could
result in a hazardous situation.
WARNING: Safety requirements are not fulfilled unless the equipment is
connected to a wall socket outlet with protective earth contact.

ABOUT THIS GUIDE
This guide describes how to install, configure, and manage the SuperStack®II
PathBuilder™S330 and SuperStackII PathBuilderS310 WAN access switches
(PathBuilder S330/S310 switch).
This guide is intended for network administrators, system engineers, field
engineers, and other personnel responsible for installing, configuring, and
managing PathBuilder products.
If release notes are shipped with your product and the information there differs
from the information in this guide, follow the instructions in the release notes.
Most user guides and release notes are available in Adobe Acrobat Reader
Portable Document Format (PDF) or HTML on the 3Com World Wide Web site:
http://www.3com.com/
Conventions Table 1 and Table 2 list conventions that are used throughout this guide.
Table 1 Notice Icons
Icon Notice Type Description
Information note Information that describes important features or instructions
Caution Information that alerts you to potential loss of data or potential
damage to an application, system, or device
Warning Information that alerts you to potential personal injury
Table 2 Text Conventions
Convention Description
Screen displays This typeface represents information as it appears on the screen.
Syntax The word “syntax” means that you must evaluate the syntax provided
and then supply the appropriate values for the placeholders that
appear in angle brackets. Example:
To enable RIPIP, use the following syntax:
SETDefault !<port> -RIPIP CONTrol = Listen
In this example, you must supply a port number for <port>.
Commands The word “command” means that you must enter the command
exactly as shown and then press Return or Enter. Commands appear in
bold. Example:
To remove the IP address, enter the following command:
SETDefault !0 -IP NETaddr = 0.0.0.0
(continued)

2ABOUT THIS GUIDE
Related
Documentation In addition to this guide, the following documents may help you use the
PathBuilder S330/S310 WAN access switch:
■PathBuilder S330/S310 Release Notes
These notes provide information about the system software release, including
new features and any known limitations and issues found in the release. They
also provide information about any changes in the PathBuilder S330/S310
documentation.
■PathBuilder Switch Manager User Guide
This guide describes how to use PathBuilder Switch Manager to configure and
manage PathBuilder WAN access switches. Using PathBuilder Switch Manager,
you can configure shelf, device, and circuit information; use a loopback panel
to diagnose port cards; view line and interface statistics; and perform
administrative functions such as configuring trap destinations and setting
SNMP community strings.
The words “enter”
and “type” When you see the word “enter” in this guide, you must type something, and then press Return or Enter. Do not press Return or
Enter when an instruction simply says “type.”
Keyboard key names If you must press two or more keys simultaneously, the key names are
linked with a plus sign (+). Example:
Press Ctrl+Alt+Del
Words in italics Italics are used to:
■Emphasize a point.
■Denote a new term at the place where it is defined in the text.
■Identify menu names, menu commands, and software button
names. Examples:
From the Help menu, select Contents.
Click OK.
Product name Throughout this guide, the SuperStack II PathBuilder S330 and S310
WAN access switches are referred to as the PathBuilder S330/S310
switches.
Table 2 Text Conventions (continued)
Convention Description

1SYSTEM DESCRIPTION
This chapter describes the SuperStack®II PathBuilder™S330 and SuperStack II
PathBuilderS310 WAN access switches (PathBuilder S330/S310 switch), and lists
PathBuilder S330 and PathBuilder S310 system specifications. It contains the
following sections:
■PathBuilder S330/S310 Overview
■Application Support
■Key Benefits
PathBuilderS330/S310
Overview The PathBuilder S330 WAN access switch provides cost-effective T1/nxT1 or
E1/nxE1 connections between local campus and enterprise networks via private
leased line or public carrier ATM services so you can extend high-speed Internet
access, Frame Relay, and ATM network service—as well as voice and video—out to
your branch offices. Using the built-in ATM Forum standard-based inverse
multiplexing capabilities, you can integrate voice, video, and high-speed data
services over the same WAN link.
The PathBuilder S330 and S310 switches use the same hardware, but the
PathBuilder S330 software allows more interfaces to be used. The following
subsections describe the features of each unit in greater detail.
PathBuilder S330
Features The PathBuilder S330 base platform offers the following features:
■T1/nxT1 ATM UNI or E1/nxE1 ATM UNI with up to four interfaces for
aggregated high-speed of 6Mbps WAN access. Each user-to-network interface
(UNI) can be used alone or bundled into a group using the Inverse Multiplexing
for ATM (IMA) standard, accommodating branch office growth from a single
T1/E1 (1.5/2 Mbps) bandwidth to four T1s/E1s (6/8 Mbps).
With the optional 4-port IMA expansion card installed, the PathBuilder S330
switch provides up to eight ports of T1/E1 UNI with IMA.
■The PathBuilder S330 switch allows up to 70 msec of differential delay
between T1s/E1s in a single IMA bundle. The unit also supports an automatic
mechanism for removing failed lines from an IMA bundle, ensuring the
resiliency required for your mission-critical applications.
■Multiple connections to Ethernet segments over ATM WAN and support of
bridging, including learning, aging, filtering, spanning tree, and classical IP over
ATM (RFC 1577 (2225)) through the standard Ethernet 10BASE-T port and the
optional Ethernet 10/100BASE-T (Ethernet PCI) module. The standard Ethernet
10BASE-T port supports half duplex only, while the optional Ethernet
10/100BASE-T port supports both half and full duplex.

4CHAPTER 1: SYSTEM DESCRIPTION
■Support of Frame Relay (service and network) interworking, ATM DXI, and
SDLC/HDLC pass-through, through the high-performance serial frame data
interface.
■Choice of either single-mode or multi-mode OC3/STM-1 (separate units),
through the OC3/STM-1 module. Single-mode enables higher-speed trunking if
you have access to fiber WAN, while multi-mode is ideal for connecting
high-speed servers, switches, or hubs equipped with multi-mode fiber
connections.
■Three expansion slots, allowing you to add other advanced features, such as
T1-DSX or E1 CBR for voice and video, voice compression, Ethernet 10/100,
DS3/E3, or 4 additional T1/E1 IMA ports.
■4x switch switching architecture, including four priority queues (three queues
shaped and one bulk shaper) with user-defined queue sizes and early and
partial packet discard capability.
■Device management via VT100 menu-driven interface, Telnet, or SNMP, with
local, remote, and in-band access.
The following optional modules are available for use with the PathBuilder S330
switch:
■The four-port CBR module services traffic generated by your existing PBXs,
channels, T1/E1 multiplexers, CSU/DSUs, and video conferencing devices. The
CBR module consists of one V.35/RS-449 and three T1-DSX or E1 interfaces,
which support both structured and unstructured services, in accordance with
the ATM Forum’s Circuit Emulation Service (CES) specifications. The CBR
module provides a smooth migration from legacy CBR service (PBX/voice/video)
to ATM service. It also supports all relevant ATM and T1/E1 standards, ensuring
easy integration of existing equipment into new ATM networks.
■The one-port voice compression module (VCM) is similar in function to the CBR
module, but it employs compression algorithms that allow more voice calls to
be placed through the same bandwidth. The VCM’s T1-DSX/E1 interface
connects to a PBX trunk, which may use CAS or CCS signaling. Its 24/30 DS0
channels can carry individual voice, fax, modem, or data connections. You can
also bundle multiple DS0s to provide connections for high-rate applications
such as video conference or multiple-link PPP. For CCS, a DS0 is used as an
ISDN D-channel for carrying signal messages.
■The Ethernet 10/100 module provides a one-port PCI Ethernet interface that
you can set for 10 or 100Mbps, full or half duplex, or configure for
autosensing.
■The DS3/E3 module provides a DS3 or E3 interface, typically used for
terminating/accessing the public or private ATM WAN services. However,
depending on your local applications, you can also use these modules for
taking local DS3 or E3 ATM traffic across the WAN.
■The four-port IMA expansion card adds four ports to the T1/E1 UNI with IMA
interface, thereby providing the PathBuilder S330 with 8-port IMA
functionality.
Figure 1 shows the PathBuilder S330 switch with the optional CBR module
installed in expansion slot 7, VCM in slot 8, and DS3/E3 UNI module in slot 9.

PathBuilder S330/S310 Overview 5
Figure 1 PathBuilder S330 WAN Access Switch
PathBuilder S310
Features The PathBuilder S310 switch is a feature-restricted version of the PathBuilder S330 switch, useful for providing remote site CPE access. Its physical appearance is the
same as that of the PathBuilder S330 switch but its software does not enable all
the ports. You can upgrade from the PathBuilder S310 switch to the PathBuilder
S330 switch (multi-mode fiber model) simply by purchasing software.
The PathBuilder S310 base platform offers the following features:
■Single T1/E1 UNI.
■Multiple connections to Ethernet segments over ATM WAN and support of
bridging, including learning, aging, filtering, spanning tree, and classical IP over
ATM (RFC 1577 (2225)) through the standard Ethernet 10BASE-T port and the
optional Ethernet 10/100BASE-T (Ethernet PCI) module. The standard Ethernet
10BASE-T port supports half duplex only, while the optional Ethernet
10/100BASE-T port supports both half and full duplex.
LAN
NMS Console
RS-232
Router
PBX PBX
T1-DSX/E1 T1-DSX/E1
OC3/STM-1
n x T1/E1 IMA
10BASE-T
V.35/
RS-449/
RS-530/
X.21
V.35/
RS-449/
RS-530/
X.21
Video/Audio
Codec
RS-366
Network

6CHAPTER 1: SYSTEM DESCRIPTION
■Support of Frame Relay (service and network) interworking, ATM DXI, and
SDLC/HDLC pass-through, through the high-performance serial frame data
interface.
■Three expansion slots, allowing you to add other advanced features, such as
T1-DSX or E1 CBR for voice and video, voice compression, or Ethernet 10/100
support.
The following optional modules are available for use with the PathBuilder S310
switch:
■The two-port CBR module services traffic generated by your existing PBXs,
channels, T1/E1 multiplexers, CSU/DSUs, and video conferencing devices. The
CBR module consists of one V.35/RS-449 and one T1-DSX or E1 interface,
which support both structured and unstructured services, in accordance with
the ATM Forum’s Circuit Emulation Service (CES) specifications. The CBR
module provides a smooth migration from legacy CBR service (PBX/voice/video)
to ATM service. It also supports all relevant ATM and T1/E1 standards, ensuring
easy integration of existing equipment into new ATM networks.
■The one-port Voice Compression module (VCM) is similar in function to the
CBR module, but it employs compression algorithms that allow more voice calls
to be placed through the same bandwidth. The VCM’s T1-DSX/E1 interface
connects to a PBX trunk, which may use CAS or CCS signaling. Its 24/30 DS0
channels can carry individual voice, fax, modem, or data connections. You can
also bundle multiple DS0s to provide connections for high-rate applications
such as video conference or multiple-link PPP. For CCS, a DS0 is used as an
ISDN D-channel for carrying signal messages.
■The Ethernet 10/100 module provides a one-port PCI Ethernet interface that
you can set for 10 Mbps or 100Mbps, full or half duplex, or configure for
autosensing.
Figure 2 shows the PathBuilder S310 switch with the optional CBR module
installed in expansion slot 7 and the Voice Compression module in slot 8.