3com VCX V7122 SIP User manual

1

3Com

®

VCX

™

V7122 SIP VoIP

Gateway User Manual

Version 4.2

http://www.3com.com

Part Number 900-0181-01 Rev AA

Published June 2004

2 3Com VCX V7122/SIP VoIP Gateway User Manual

3Com Corporation, 350 Campus Drive, Marlborough MA 01752-3064

any means or used to make any derivative work (such as translation, transformation, or adaptation) without written permission

from 3Com Corporation.

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including, but not limited to, the implied warranties, terms, or conditions of merchantability, satisfactory quality, and fitness for a

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If there is any software on removable media described in this documentation, it is furnished under a license agreement included

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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

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Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered

in other countries.

3Com, the 3Com logo, NBX, and SuperStack are registered trademarks of 3Com Corporation. NBX NetSet, pcXset, and VCX

are trademarks of 3Com Corporation.

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All other company and product names may be trademarks of the respective companies with which they are associated.

3Com VCX V7122/SIP VoIP Gateway User Manual 3

CONTENTS

ABOUT THIS GUIDE 9

How to Use This Guide 9

Conventions 10

Related Documentation 10

Documentation Comments 10

CHAPTER 1: OVERVIEW OF THE VCX V7122 13

Introduction 13

VCX V7122/SIP Gateway Key Features 16

Reader's Notes 17

CHAPTER 2: HARDWARE INSTALLATION 19

Hardware Installation Procedure 19

General 19

Available Configurations 20

Applicable Boards 20

Unpacking 21

Installation 22

Board Replacement 23

Optional CPU Board 23

VCX V7122/SIP Front and Rear Panels 24

VCX V7122/SIP Front Panels 24

VCX V7122/SIP Rear Panels 27

VCX V7122/SIP Front Panel LED Indicators 33

Reader's Notes 35

CHAPTER 3: SOFTWARE INSTALLATION 37

Installation Package 37

VCX V7122/SIP Initialization 37

Quick Setup Procedure 38

BootP/DHCP and TFTP Procedures 40

4 3Com VCX V7122/SIP VoIP Gateway User Manual

Configuring the TFTP Server 41

Using 3Com BootP/TFTP Configuration Utility 42

Configuring the Windows NT DHCP Server 42

Other TFTP and BootP Servers 43

VCX V7122/SIP Software Upgrade 43

General Upgrade Procedure 43

Reader's Notes 47

CHAPTER 4: PROFILE, OPERATION, AND CONFIGURATION 49

General 49

PSTN-to-SIP Interworking 49

Supported SIP Features 50

VCX V7122/SIP Gateway Features 51

Trunk to Trunk Routing Example 54

SIP Call Flow Example 54

SIP Authentication Example 57

Reader's Notes 60

CHAPTER 5: PROVISIONING 61

Provisioning for SIP Operation 61

Basic, Logging and Web Parameters 62

E1/T1 Configuration Parameters 65

Channel Parameters 73

SIP Configuration Parameters 76

Loading Call Progress Tones and E1/T1 CAS Configuration Files 85

The INI File Structure 86

The INI File Structure Rules 86

The INI File Examples 87

Excel Utility for INI File Generation 87

General Data Sheet 88

SIP Parameters Sheet 89

End Points Data Sheet 90

Prefix to IP Routing Table 91

E1/T1 Parameters Sheet 92

Using Call Progress Tones 92

Format of the Call Progress INI File 93

Default Template for Call Progress Tones 94

3Com VCX V7122/SIP VoIP Gateway User Manual 5

Call Progress Tone Generation and Download Procedure 96

Reader's Notes 99

CHAPTER 6: DEVICE MANAGEMENT 101

SNMP Management 101

SNMP Overview 101

SNMP Messages 101

SNMP MIB Objects 102

SNMP Extensibility Feature 103

VCX V7122/SIP Gateway Supported MIBs 103

Web Management 104

Overview 104

Password Control 104

The Embedded Web Server Username Password 104

Security Preferences 105

Accessing the Embedded Web Server 105

Quick Setup Configuration Parameters 106

Protocol Management Menu 107

Protocol Definition 108

Advanced Configuration Menu 113

Status and Diagnostic Menu 121

Software Update Menu 124

Save Configuration 128

Reader's Notes 129

CHAPTER 7: DIAGNOSTICS 131

Diagnostics Overview 131

VCX V7122/SIP Gateway Alarms and SNMP Traps 131

LED Visual Indicator Status and Alarms 131

SNMP Traps 132

VCX V7122/SIP Self-Testing 133

SysLog Support 133

Overview 133

SysLog Operation 134

6 3Com VCX V7122/SIP VoIP Gateway User Manual

Solutions to Possible Problems 135

Possible Common Problems 135

Possible Voice Problems 137

Reader's Notes 138

CHAPTER 8: SPECIFICATIONS 139

VCX V7122/SIP Specifications 139

Reader's Notes 143

APPENDIX A: BOOTP/TFTP CONFIGURATION UTILITY 145

Introduction 145

Key Features 145

Specifications 146

BootP/TFTP Configuration Utility Installation 146

Logging Screen 147

Preferences Window 147

Client Configuration Window 147

Template Window 148

Window Details 149

Main Window 149

Preferences Window 150

Client Configuration Window 152

Templates Window 153

Reader's Notes 155

APPENDIX B: RTP/RTCP PAYLOAD TYPES 157

B.1 Payload Types Defined in RFC 1890 157

B.2 3Com Defined Payload Types 158

APPENDIX C: DEFAULT RTP/RTCP/T.38 PORT ALLOCATION 159

Reader's Notes 160

APPENDIX D: DTMF, FAX, AND MODEM TRANSPORT MODES 161

DTMF/MF Relay Settings 161

Fax/Modem Settings 161

Configuring Fax Relay Mode 161

Configuring Fax/Modem ByPass Mode 162

3Com VCX V7122/SIP VoIP Gateway User Manual 7

Supporting V.34 Faxes 162

Reader's Notes 164

APPENDIX E: VCX V7122 CLOCK SETTINGS 165

Reader's Notes 166

APPENDIX F: WINDOWS NT DHCP SERVER CONFIGURATION 167

Reader's Notes 172

APPENDIX G: OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS 173

Register Your Product to Gain Service Benefits 173

Solve Problems Online 173

Purchase Extended Warranty and Professional Services 173

Access Software Downloads 174

Contact Us 174

Telephone Technical Support and Repair 174

8 3Com VCX V7122/SIP VoIP Gateway User Manual

3Com VCX V7122/SIP VoIP Gateway User Manual 9

ABOUT THIS GUIDE

This User’s Manual describes the 3Com VCX V7122/SIP (Session Initialization Protocol)

VoIP Gateway and TrunkPack TP-1610/SIP cPCI board, supported by Version 4.2 software.

Information contained in this document is believed to be accurate and reliable at the time of

printing. However, due to ongoing product improvements and revisions, 3Com cannot

guarantee accuracy of printed material after the Date Published nor can it accept

responsibility for errors or omissions. See “Appendix G: Obtaining Support for Your 3Com

Products” for details on how to register your product and get support from 3Com.

How to Use This Guide

This book covers these topics:

 Chapter 1: Overview of the VCX V7122

 Chapter 2: Hardware Installation

 Chapter 3: Software Installation

 Chapter 4: Profile, Operation, and Configuration

 Chapter 5: Provisioning

 Chapter 6: Device Management

 Chapter 7: Diagnostics

 Chapter 8: Specifications

 Appendix A: BootP/TFTP Configuration Utility

 Appendix B: RTP/RTCP Payload Types

 Appendix C: Default RTP/RTCP/T.38 Port Allocation

 Appendix D: DTMF, Fax, and Modem Transport Modes

 Appendix E: VCX V7122 Clock Settings

 Appendix F: Windows NT DHCP Server Configuration

 Appendix G: Obtaining Support for Your 3Com Products

10 3Com VCX V7122/SIP VoIP Gateway User Manual

Conventions

Table 1 lists 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, device, system, or network.

Warning Information that alerts you to potential personal injury or death.

Hexadecimal notation is indicated by 0x preceding the number.

Related Documentation

The following documents are available on the 3Com Partner Access website for the 3Com

VCX V7122 VoIP Gateway:

 VCX V7122/SIP Release Notes, Version 4.2

Documentation Comments

Your suggestions are important to us because we want to make our documentation more

useful to you.

Please send e-mail comments about this guide or any of the VCX V7122 documentation and

Help systems to:

[email protected]

3Com VCX V7122/SIP VoIP Gateway User Manual 11

Please include the following information with your comments:

 Document title

 Document part number (usually found on the front page)

 Page number

 Your name and organization (optional)

Example:

3Com VCX V7122/SIP VoIP Gateway User’s Manual

Page 25

12 3Com VCX V7122/SIP VoIP Gateway User Manual

3Com VCX V7122/SIP VoIP Gateway User Manual 13

CHAPTER 1: OVERVIEW OF THE VCX

V7122

Introduction

The 3Com VCX V7122/SIP (Session Initialization Protocol) VoIP Gateway provides excellent

voice quality and optimized packet voice streaming over IP networks. The VCX V7122/SIP

Gateway enables voice, fax, and data traffic to be sent over the same IP network.

Based on the 3Com award-winning, field-proven TrunkPack design, the VCX V7122/SIP

Gateway uses 3COM DSP voice compression technology.

The VCX V7122/SIP incorporates 1, 2, 4, 8, 16 E1, or T1 spans for connection, directly to

PSTN telephony trunks, and includes one or two 10/100 Base-T Ethernet ports for

connection to the LAN.

The VCX 7122/SIP supports up to 480 simultaneous Voice over IP (VoIP) or Fax over IP

(FoIP) calls, supporting various ISDN PRI protocols such as EuroISDN, North American NI2,

Lucent 5ESS, Nortel DMS100, and others. In addition, it supports different variants of

Channel Associated Signaling (CAS) protocols for E1 and T1 spans, including MFC/R2, E&M

immediate start, E&M delay dial/start, loop start, and ground start.

The VCX V7122/SIP Gateway, best suited for large and medium-sized VoIP applications, is

a compact device, comprising a 19-inch 1U chassis with optional dual AC or single DC

power supplies.

The deployment architecture can include several VCX V7122/SIP Gateways in branch or

departmental offices, connected to local PBXs and call routing is performed by a centralized

SIP proxy. Thus, the VCX V7122/SIP VoIP Gateway enables you to make low cost long

distance or international telephone/fax calls between distributed company offices, using their

existing PBXs and telephones/fax. These calls are routed over existing IP Internet or Intranet

corporate data network(s). In addition, low bit-rate vocoders and silence suppression can be

used, ensuring that voice traffic takes the minimum of space on the data network.

The VCX V7122/SIP can also route calls over the network using SIP signaling protocol,

enabling the deployment of Voice over Packet solutions in environments where access is

enabled to PSTN subscribers by using a Trunking Media Gateway. This provides the ability

to transmit voice and telephony signals between a packet network and a TDM network.

Routing of the calls from the PSTN to a SIP service node (for example, a call center) is

performed by the VCX V7122/SIP internal routing feature or by a SIP proxy.

Both of the above applications are depicted in Figure 3

on page 15.

14 3Com VCX V7122/SIP VoIP Gateway User Manual

Figure 1 VCX V7122/SIP Front View

Figure 2 VCX 7122/SIP Rear View

Figure 3

illustrates typical VCX V7122 2000/SIP Gateway applications over VoIP Network

3Com VCX V7122/SIP VoIP Gateway User Manual 15

Figure 3 Typical VCX V7122/SIP Gateway Application

SIP

Service

Node

LAN

PSTN

LAN

Telephone

LAN

SIP Proxy

VCX V7122

E1/T1 PRI/

CAS

Router

VCX V7122

PBX - Branch B

E1/T1 PRI/

CAS

VCX V7122

PBX - Branch A

E1/T1 PRI/

CAS

LAN

IP Network

Router

16 3Com VCX V7122/SIP VoIP Gateway User Manual

VCX V7122/SIP Gateway Key Features

 Superior, high quality PSTN Gateway for Voice and Fax over IP calls.

 Up to 16 E1/T1/J1 digital spans supporting various PRI and CAS protocols.

 Two 10/100 Base-T Ethernet interface connections to the IP network, providing LAN

redundancy.

 Coders include: G.711, G.723.1, G.726, G.727, G.729A, and NetCoder at from 6.4

through 9.6 Kbps, selectable per channel.

 Echo Canceler with a 32 ms tail.

 Silence suppression with Comfort Noise Generation.

 Compliant with SIP (RFC 3261).

 Compact, rugged 19-inch rack mount unit, one U high (1.75 in. or 44.5 mm), with two

CompactPCI (cPCI) slots.

 Optional cPCI slot for third-party CPU board.

 TP-1610 hot-swap cPCI board.

 Optional dual redundant AC power supply.

3Com VCX V7122/SIP VoIP Gateway User Manual 17

Reader's Notes

18 3Com VCX V7122/SIP VoIP Gateway User Manual

3Com VCX V7122/SIP VoIP Gateway User Manual 19

CHAPTER 2: HARDWARE INSTALLATION

Hardware Installation Procedure

General

The VCX V7122/SIP Gateway comprises a single 3Com CompactPCI board and a 19-inch

1U chassis with an optional dual AC or single DC power supply. The cPCI board is a high-

density, hot-swappable, compactPCI resource board with a capacity of up to 480 ports,

supporting all necessary functions for voice, data, and fax streaming over IP networks.

This board is available with a rear I/O configuration in which both PSTN trunks and Ethernet

interface are located on a passive rear I/O module.

Figure 4 VCX V7122/SIP Gateway Front View

Table 2 Figure 4 Legend

1 cPCI board locking screws

2

3COM TP-1610 cPCI board, 16-trunk

configuration

3 cPCI latch

4 Front panel LEDs

1

3

4

3

2

1

20 3Com VCX V7122/SIP VoIP Gateway User Manual

Available Configurations

The VCX V7122/SIP is composed of two identical Media Gateway modules: Gateway-1 and

Gateway-2, each containing 240 DSP channels. These Media Gateways are fully

independent, each Gateway having its own MAC and IP addresses and LED indicators. Two

10/100 Base-T Ethernet connectors are provided on the Gateway rear panel, these LAN

interfaces being connected to Media Gateways using an internal LAN switch.

The VCX V7122/SIP Gateway is provided in the following configurations:

 E1 available configurations:

 30 Channels on one E1 span with Gateway-1 only

 60 Channels on two E1 spans with Gateway-1 only

 120 Channels on four E1 spans with Gateway-1 only

 240 Channels on eight E1 spans with Gateway-1 only

 480 Channels on 16 E1 spans with Gateway-1 and Gateway-2

 T1 available configurations:

 24 Channels on one T1 span with Gateway-1 only

 48 Channels on two T1 spans with Gateway-1 only

 96 Channels on four T1 spans with Gateway-1 only

 192 Channels on eight T1 spans with Gateway-1 only

 384 Channels on 16 T1 spans with Gateway-1 and Gateway-2

Applicable Boards

TP-1610, the board used for the VCX V7122/SIP Gateway.

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3com VCX V7122 SIP User manual

3com VCX V7122 SIP User manual

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