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V7122 Gateway
User Guide
System Release 5.0
http://www.3com.com
Part Number 900-0484-01 Rev AA
Published December 2007
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V7122 GatewayUser Guide
3Com Corporation, 350 Campus Drive, Marlborough MA 01752-3064
Copyright © 2007, 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
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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 hardcopy 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 guide.
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.
V7122 Gateway User Guide
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C
ONTENTS
CONTENTS 3
ABOUT THIS GUIDE 15
How to Use This Guide 15
Conventions 16
Model Numbers for the V7122 Gateways 16
Documentation Comments 17
Notices 18
WEEE EU Directive 18
Abbreviations and Terminology 18
CHAPTER 1: OVERVIEW 19
V7122 Overview 19
TP-1610 Overview 20
TP-260 Overview 21
SIP Overview 22
Features 23
General Features 23
PSTN-to-SIP Interworking Features 24
Supported SIP Features 25
CHAPTER 2: PHYSICAL DESCRIPTION 29
V7122 Physical Description 29
The V7122 Chassis 30
Optional CPU Board 31
TP-1610 Physical Description 31
TP-1610 Front Panel LED Indicators 32
Rear Transition Module 34
TP-260 Physical Description 36
TP-260 LEDs 37
Reader’s Notes 39
CHAPTER 3: INSTALLATION 41
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Installing the V7122 41
Unpacking 42
Package Contents 42
Mounting the V7122 Gateway 43
Cabling the V7122 Gateway 45
Installing the TP-1610 51
Unpacking 52
Package Contents 52
Installing the TP-1610 52
Cabling the TP-1610 54
Installing the TP-260 54
Unpacking 55
Package Contents 55
Installing the TP-260 55
Cabling the TP-260 56
Reader’s Notes 58
CHAPTER 4: GETTING STARTED 59
Configuration Concepts 59
Assigning the an IP Address to the Gateway 60
Assigning an IP Address Using HTTP 60
Assigning an IP Address Using BootP 61
Assigning an IP Address Using the CLI 61
Configuring the Gateway’s Basic Parameters 63
Reader’s Notes 66
CHAPTER 5: WEB MANAGEMENT 67
Computer Requirements 67
Protection and Security Mechanisms 67
User Accounts 68
Limiting the Embedded Web Server to Read-Only Mode 69
Disabling the Embedded Web Server 69
Accessing the Embedded Web Server 69
Using Internet Explorer to Access the Embedded Web Server 70
Getting Acquainted with the Web Interface 71
Main Menu Bar 72
Saving Changes 72
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Searching Configuration Parameters 73
Entering Phone Numbers in Various Tables 74
Protocol Management 74
Protocol Definition Parameters 75
Advanced Parameters 76
Number Manipulation Tables 76
Mapping NPI/TON to Phone-Context 81
Configuring the Routing Tables 83
Configuring the Profile Definitions 92
Configuring the Trunk Group Table 98
Configuring the Trunk Group Settings 99
Advanced Configuration 101
Configuring the Network Settings 101
Configuring the Media Settings 105
Configuring the Trunk Settings 105
Configuring SS7 Tunneling 108
Configuring the TDM Bus Settings 112
Restoring and Backing up the Gateway Configuration 113
Regional Settings 114
Security Settings 116
Configuring the Management Settings 120
Status & Diagnostic 123
Gateway Statistics 123
Monitoring the Gateway’s Trunks & Channels 127
Activating the Internal Syslog Viewer 129
Device Information 130
Viewing the Ethernet Port Information 131
Software Update Menu 132
Software Upgrade Wizard 132
Auxiliary Files 137
Updating the Software Upgrade Key 139
Maintenance 139
Locking and Unlocking the Gateway 139
Saving Configuration 141
Resetting the Gateway 142
Logging Off the Embedded Web Server 143
Reader’s Notes 144
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CHAPTER 6: THE GATEWAY’S INI FILE CONFIGURATION 145
Secured ini File 145
Modifying an ini File 145
The ini File Content 146
The ini File Structure 147
The ini File Structure Rules 147
The ini File Example 147
Networking Parameters 148
System Parameters 160
Web and Telnet Parameters 166
Security Parameters 168
RADIUS Parameters 171
SNMP Parameters 172
SIP Configuration Parameters 174
Voice Mail Parameters 201
ISDN and CAS Interworking-Related Parameters 203
Number Manipulation and Routing Parameters 213
E1/T1 Configuration Parameters 223
Channel Parameters 231
Configuration Files Parameters 237
Reader’s Notes 239
CHAPTER 7: USING BOOTP / DHCP 241
BootP/DHCP Server Parameters 241
Using DHCP 243
Using BootP 244
Upgrading the 244
Gateway 244
Vendor Specific Information Field 244
Reader’s Notes 246
CHAPTER 8: TELEPHONY CAPABILITIES 247
Working with Supplementary Services 247
Call Hold and Retrieve Features 247
Call Transfer 248
Configuring the DTMF Transport Types 248
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Fax & Modem Transport Modes 250
Fax/Modem Settings 250
Event Notification using X-Detect Header 252
ThroughPacket™ 254
Dynamic Jitter Buffer Operation 254
Configuring the Gateway’s Alternative Routing (based on Connectivity and QoS) 256
Alternative Routing Mechanism 256
Determining the Availability of Destination IP Addresses 256
PSTN Fallback as a Special Case of Alternative Routing 257
Relevant Parameters 257
Call Detail Report 257
Supported RADIUS Attributes 259
RADIUS Server Messages 261
Trunk to Trunk Routing Example 261
Proxy or Registrar Registration Example 262
SIP Call Flow Example 263
SIP Authentication Example 266
Reader’s Notes 270
CHAPTER 9: NETWORKING CAPABILITIES 271
Ethernet Interface Configuration 271
Ethernet Interface Redundancy 272
NAT (Network Address Translation) Support 272
STUN 273
First Incoming Packet Mechanism 274
No-Op Packets 275
Point-to-Point Protocol over Ethernet (PPPoE) 275
Point-to-Point Protocol (PPP) Overview 275
PPPoE Overview 276
PPPoE in 3Com Gateways 277
IP Multicasting 278
Robust Reception of RTP Streams 278
Multiple Routers Support 278
Simple Network Time Protocol Support 279
IP QoS Using Differentiated Services (DiffServ) 279
VLANS and Multiple IPs 280
Multiple IPs 280
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IEEE 802.1p/Q (VLANs and Priority) 280
Getting Started with VLANS and Multiple IPs 282
Reader’s Notes 287
CHAPTER 10: ADVANCED PSTN CONFIGURATION 289
Gateway Clock Settings 289
ISDN Overlap Dialing 290
Using ISDN NFAS 290
NFAS Interface ID 291
Working with DMS-100 Switches 292
Redirect Number and Calling Name (Display) 293
Reader’s Notes 294
CHAPTER 11: ADVANCED SYSTEM CAPABILITIES 295
Restoring Networking Parameters to their Initial State 295
Establishing a Serial Communications Link with the Gateway 295
Automatic Update Mechanism 296
Startup Process 298
Using Parameter Tables 301
Table Indices 301
Table Permissions 302
Dynamic Tables vs. Static Tables 302
Secret Tables 302
Using the ini File to Configure Parameter Tables 303
Customizing the V7122 Web Interface 305
Replacing the Main Corporate Logo 305
Replacing the Background Image File 307
Customizing the Product Name 309
Modifying ini File Parameters Using the Web AdminPage 309
Software Upgrade Key 310
Backing up the Current Software Upgrade Key 311
Loading the Software Upgrade Key 311
Verifying that the Key was Successfully Loaded 313
Troubleshooting an Unsuccessful Loading of a Key 313
Abort Procedure 314
Reader’s Notes 315
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CHAPTER 12: SPECIAL APPLICATIONS 317
TDM Tunneling 317
Implementation 317
SS7 Tunneling 319
MTP2 Tunneling Technology 320
SS7 Characteristics 321
SS7 Parameters 321
SS7 Parameter Tables 323
SS7 MTP2 Tunneling ini File Example 328
QSIG Tunneling 330
Implementation 330
Reader’s Notes 332
CHAPTER 13: SECURITY 333
IPSec and IKE 333
IKE 334
IPSec 335
Configuring the IPSec and IKE 335
SSL/TLS 345
SIP Over TLS (SIPS) 345
Embedded Web Server Configuration 345
Secured Telnet 346
Server Certificate Replacement 346
Client Certificates 348
SRTP 349
RADIUS Login Authentication 350
Setting Up a RADIUS Server 350
Configuring RADIUS Support 352
Internal Firewall 353
Network Port Usage 355
Recommended Practices 356
Legal Notice 357
Reader’s Notes 358
CHAPTER 14: DIAGNOSTICS 359
Self-Testing 359
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Syslog Support 360
Syslog Servers 361
Operation 361
Reader’s Notes 362
CHAPTER 15: SNMP-BASED MANAGEMENT 363
SNMP Standards and Objects 363
SNMP Message Standard 363
SNMP MIB Objects 364
SNMP Extensibility Feature 365
Carrier Grade Alarm System 365
Active Alarm Table 366
Alarm History 366
Cold Start Trap 367
Third-Party Performance Monitoring Measurements 367
Total Counters 368
TrunkPack-VoP Series Supported MIBs 368
Traps 371
SNMP Interface Details 374
SNMP Community Names 375
SNMP v3 USM Users 377
Trusted Managers 379
SNMP Ports 382
Multiple SNMP Trap Destinations 382
SNMP Manager Backward Compatibility 385
Dual Module Interface 385
SNMP NAT Traversal 386
SNMP Administrative State Control 386
Node Maintenance 386
Graceful Shutdown 387
3Com’s Element Management System 388
Reader’s Notes 389
CHAPTER 16: CONFIGURATION FILES 391
Configuring the Call Progress Tones 391
Format of the Call Progress Tones Section in the ini File 392
Prerecorded Tones (PRT) File 395
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PRT File Format 395
Voice Prompts File 395
CAS Protocol Configuration Files 396
User Information File 396
Reader’s Notes 398
APPENDIX A: SELECTED TECHNICAL SPECIFICATIONS 399
General Specifications 399
V7122 Specifications 401
TP-1610 Specifications 403
TP-260 Specifications 405
Reader’s Notes 406
APPENDIX B: SUPPLIED SIP SOFTWARE KIT 407
Reader's Notes 408
APPENDIX C: SIP COMPLIANCE TABLES 410
SIP Functions 410
SIP Methods 410
SIP Headers 411
SDP Headers 413
SIP Responses 414
1xx Response – Information Responses 414
2xx Response – Successful Responses 414
3xx Response – Redirection Responses 415
4xx Response – Client Failure Responses 416
5xx Response – Server Failure Responses 418
6xx Response – Global Responses 418
Reader's Notes 419
APPENDIX D: THE BOOTP/TFTP CONFIGURATION UTILITY 420
When to Use the BootP/TFTP 420
An Overview of BootP 420
Key Features 421
Specifications 421
Installation 421
Loading the cmp File, Booting the Device 422
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BootP/TFTP Application User Interface 422
Function Buttons on the Main Screen 423
Log Window 423
Setting the Preferences 425
BootP Preferences 425
TFTP Preferences 426
Configuring the BootP Clients 427
Adding Clients 427
Deleting Clients 428
Editing Client Parameters 428
Testing the Client 429
Setting Client Parameters 429
Using Command Line Switches 430
Managing Client Templates 432
APPENDIX E: RTP/RTCP PAYLOAD TYPES AND PORT ALLOCATION 434
Payload Types Defined in RFC 3551 434
Defined Payload Types 434
Default RTP/RTCP/T.38 Port Allocation 435
Reader’s Notes 437
APPENDIX F: RTP CONTROL PROTOCOL EXTENDED REPORTS (RTCP-XR) 438
APPENDIX G: ACCESSORY PROGRAMS AND TOOLS 441
TrunkPack Downloadable Conversion Utility 441
Converting a CPT ini File to a Binary dat File 442
Creating a Loadable Voice Prompts File 444
Creating a loadable CAS Protocol Table File 445
Encoding / Decoding an ini File 447
Creating a Loadable Prerecorded Tones File 448
PSTN Trace Utility 450
Operation 450
Reader’s Notes 453
APPENDIX H: RELEASE REASON MAPPING 454
Reason Header 454
Fixed Mapping of ISDN Release Reason to SIP Response 455
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Fixed Mapping of SIP Response to ISDN Release Reason 457
Reader’s Notes 459
APPENDIX I: SNMP TRAPS 460
Alarm Traps 460
Component: Board#<n> 460
Component: AlarmManager#0 464
Component: EthernetLink#0 465
Component: SS7#0 466
Log Traps (Notifications) 468
Other Traps 469
Trap Varbinds 471
APPENDIX J: INSTALLATION AND CONFIGURATION OF APACHE HTTP SERVER
472
Windows 2000/XP Operation Systems 472
Linux Operation Systems 473
APPENDIX K: REGULATORY INFORMATION 476
V7122 476
Safety Notice 477
Industry Canada Notice 478
Digital Device Warnings 478
Network Information and Intent of Use 478
Network Compatibility 478
Telecommunication Safety 479
FCC Statement 479
TP-1610 480
Safety Notice 481
Industry Canada Notice 481
Digital Device Warnings 481
Network Information and Intent of Use 482
Network Compatibility 482
Telecommunication Safety 482
FCC Statement 483
TP-260 484
Safety Notice 485
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Industry Canada Notice 485
FCC Digital Device Warnings 486
Network Information and Intent of Use 486
Network Compatibility 486
Telecommunication Safety 486
FCC Statement 487
Reader’s Notes 487
APPENDIX L: OBTAINING SUPPORT FOR YOUR 3COM PRODUCT 488
Customer Support 488
V7122 Gateway User Guide
15
A
BOUT
T
HIS
G
UIDE
This document describes the release of the 3Com V7122 Digital SIP Gateway, TP-1610 SIP
cPCI board, and TP-260 SIP PCI board.
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. Updates to this document and other documents can be
viewed by registered Technical Support customers at
www.3Com.com under Support / Product
Documentation.
When viewing this guide on CD, Web site or on any other electronic copy, all cross-
references are hyperlinked. Click on the page or section titles (shown in blue) to
reach the individual cross-referenced item directly. To return back to the point from
where you accessed the cross-reference, press the ALT and ◄ keys.
How to Use This Guide
This book covers these topics:
Chapter 1: Overview
1
Chapter 2: Physical Description
1
Chapter 3: Installation
1
Chapter 4: Getting Started
1
Chapter 5: Web Management
1
Chapter 6: The Gateway’s ini File Configuration
Chapter 7: Using BootP / DHCP
1
Chapter 8: Telephony Capabilities
1
Chapter 9: Networking Capabilities
1
Chapter 10: Advanced PSTN Configuration
1
Chapter 11: Advanced System Capabilities
1
Chapter 12: Special Applications
1
Chapter 13: Security
Chapter 14: Diagnostics
Chapter 15: SNMP-Based Management
1
Chapter 16: Configuration Files
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Appendix A: Selected Technical Specifications
Appendix B: Supplied SIP Software Kit
Appendix C: SIP Compliance Tables
Appendix D: The BootP/TFTP Configuration Utility
Appendix E: RTP/RTCP Payload Types and Port Allocation
Appendix F: RTP Control Protocol Extended Reports (RTCP-XR)
Appendix G: Accessory Programs and Tools
Appendix H: Release Reason Mapping
Appendix I: SNMP Traps
Appendix J: Installation and Configuration of Apache HTTP Server
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.
Model Numbers for the V7122 Gateways
This guide describes the operations for the following 3Com
®
VCX™ Digital SIP Gateways:
The VCX V7122 Digital Gateway 16 Span (3CRVG71224-07)
The VCX V7122 Digital Gateway 8 Span (3CRVG71223-07)
The VCX V7122 Digital Gateway 4 Span (3CRVG71222-07)
The VCX V7122 Digital Gateway 2 Span (3CRVG71221-07)
The VCX V7122 Digital Gateway 1 Span (3CRVG71220-07)
V7122 Gateway User Guide
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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 gateway documentation and
Help systems to:
Please include the following information with your comments:
Document title
Document part number (usually found on the front page)
Page number
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Example:
V7122 User Guide
Part Number 900-0394-01
Page 25
See the Appendix
Obtaining Support for Your Product in this guide for details on how to
register your product and get support from 3Com.
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Notices
WEEE EU Directive
Pursuant to the WEEE EU Directive, electronic and electrical waste must not be disposed of
with unsorted waste. Please contact your local recycling authority for disposal of this product.
Abbreviations and Terminology
Each abbreviation, unless widely used, is spelled out in full when first used. Only industry-
standard terms are used throughout this guide. Hexadecimal notation is indicated by 0x
preceding the number.
WARNING:
The gateway is supplied as a sealed unit and must only be serviced by qualified
service personnel.
Where ‘network’ appears in this guide, it means Local Area Network (LAN), Wide
Area Network (WAN), and the like. accessed via the gateway’s Ethernet interface.
V7122 Gateway User Guide
19
C
HAPTER
1:
O
VERVIEW
This document provides you with the information on installation, configuration and operation
of the V7122 SIP gateway, TP-1610 SIP cPCI board and TP-260 SIP PCI board. As these
products have similar functionality (with the exception of their physical layout and the number
of trunks), they are collectively referred to throughout this guide (except in hardware-related
sections) as the gateway.
V7122 Overview
The V7122 SIP Voice over IP (VoIP) gateway enables voice, fax, and data traffic to be sent
over the same IP network. The gateway provides excellent voice quality and optimized
packet voice streaming over IP networks.
The gateway uses the award-winning, field-proven Digital Signal Processing (DSP) voice
compression technology used in other TrunkPack
TM
series products.
The gateway incorporates 1, 2, 4, 8 or 16 E1 or T1 spans for connection, directly to Public
Switched Telephone Network (PSTN) / Private Branch Exchange (PBX) telephony trunks,
and includes one or two 10/100 Base-TX Ethernet ports for connection to the network.
The gateway supports up to 480 simultaneous VoIP or Fax over IP (FoIP) calls, supporting
various Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) protocols
such as EuroISDN, North American NI2, Lucent™ 4/5ESS, 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 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 gateways in branch or departmental offices,
connected to local PBXs. Call routing is performed by the gateways themselves or by SIP
Proxy(s).
The gateway enables users to make low cost long distance or international telephone/fax
calls between distributed company offices, using their existing telephones/fax. These calls
are routed over the existing network ensuring that voice traffic uses minimum bandwidth.
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The gateway 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., Call Center) is performed by the
gateway internal routing feature or by a SIP Proxy.
The gateway is offered as a 1-module (up to 240 channels or 8 trunk spans) or 2-
module (for 480 channels or 16 trunk spans only) platform. The latter
configuration supports two TrunkPack modules, each having its own IP address.
Configuration instructions in this document relate to the gateway as a 1-module
platform and must be repeated for the second module as well.
TP-1610 Overview
The TP-1610 cPCI VoIP media gateway board, based on dual TPM-1100 PMC Modules, is a
complete SIP-compliant ‘two media gateways on a board’, delivering cost-effective solution
in a convenient cPCI form-factor.
The TP-1610 is an ideal solution for SIP trunking gateways and integrated media gateways
for IP-PBXs and all-in-one communication servers. The board is designed for enterprise or
carrier applications. The TP-1610 provides up to 480 simultaneous ports for voice, fax or
data for VoIP media gateway applications providing excellent voice quality and optimized
packet voice streaming over IP networks. Employing SIP as a control protocol, the TP-1610
enables vendors and System Integrators (SIs) short time-to-market and reliable cost-
effective deployment of next-generation networks.
One or two packet processors (depending on the board's capacity) handle packet-streaming
functions through two, redundant integral 10/100 Base-TX interfaces. Each processor
implements the industry-standard RTP/RTCP packet-streaming protocol, advanced adaptive
jitter buffer management, and T.38 fax relay over IP.
The TP-1610 supports various ISDN PRI protocols such as EuroISDN, North American NI2,
Lucent™ 4/5ESS, and others. In addition, it supports different variants of 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 TP-1610 enables 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, Call
Center) is performed by the TP-1610 internal routing feature or by a SIP Proxy.
Enabling accelerated design cycles with higher density and reduced costs, the TP-1610 is an
ideal building block for scalable, reliable VoIP solutions. With the TP-1610’s comprehensive
feature set, customers can quickly design a wide range of solutions for PSTN and VoIP
networks.
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