3com VCX V7111 User manual

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3Com® VCX™ V7111 VoIP
Gateway User Guide
System Release 5.0
http://www.3com.com
Part Number 900-0486-01 AA
Published December 2007
2
3Com
®
VCX V7111 VoIP Gateway User 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
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 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 3Coms 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, and VCX are registered trademarks of 3Com Corporation.
AC logo, Ardito, 3Com, 3Com logo, IPmedia, Mediant, V7111, V7111-MLQ, NetCoder, Stretto, TrunkPack, VoicePacketizer and VoIPerfect,
are trademarks or registered trademarks of 3Com Limited. All other products or trademarks are property of their respective owners.
All other company and product names may be trademarks of the respective companies with which they are associated.
3Com
®
VCX V7111 VoIP Gateway User Guide
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C
ONTENTS
ABOUT THIS GUIDE 13
How to Use This Guide 13
Conventions 14
Related Documentation 15
Documentation Comments 15
Notices 15
WEEE EU Directive 15
Abbreviations and Terminology 15
CHAPTER 1: OVERVIEW 17
Gateway Description 17
SIP Overview 19
V7111 Features 19
General Features 19
V7111 1x PORT Hardware Features 20
V7111 24 PORT Hardware Features 20
SIP Features 20
CHAPTER 2: V7111 GATEWAY PHYSICAL DESCRIPTION 25
V7111 1x PORT Physical Description 25
V7111 1x PORT Front Panel 25
V7111 1x PORT Rear Panel 26
V7111 24 PORT Physical Description 27
V7111 24 PORT Front Panel 27
V7111 24 PORT Rear Panel 28
Readers Notes 30
CHAPTER 3: INSTALLING THE V7111 GATEWAY 31
Installing the V7111 1x PORT 31
Unpacking 31
Package Contents 32
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19-inch Rack Installation Package (Optional) 32
Mounting the V7111 1x PORT 32
Cabling the V7111 1x PORT 34
Installing the V7111 24 PORT 37
Unpacking 37
Package Contents 38
Mounting the V7111 24 PORT 38
Cabling the V7111 24 PORT 40
Readers Notes 44
CHAPTER 4: GETTING STARTED 45
Configuration Concepts 45
Assigning the V7111 Gateway IP Address 46
Assigning an IP Address Using HTTP 46
Assigning an IP Address Using BootP 47
Assigning an IP Address Using the Voice Menu Guidance 47
Assigning an IP Address Using the CLI 49
Configure the V7111 Basic Parameters 50
Readers Notes 53
CHAPTER 5: WEB MANAGEMENT 55
Computer Requirements 55
Protection and Security Mechanisms 55
User Accounts 56
Limiting the Embedded Web Server to Read-Only Mode 57
Disabling the Embedded Web Server 57
Accessing the Embedded Web Server 58
Using Internet Explorer to Access the Embedded Web Server 58
Getting Acquainted with the Web Interface 59
Main Menu Bar 60
Saving Changes 61
Entering Phone Numbers in Various Tables 61
Searching for Configuration Parameters 61
Protocol Management 63
Protocol Definition Parameters 63
Configuring the Advanced Parameters 89
Configuring the Number Manipulation Tables 108
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Mapping NPI/TON to Phone-Context 113
Configuring the Routing Tables 115
Configuring the Profile Definitions 127
Configuring the Endpoint Phone Numbers 133
Configuring the Hunt Group Settings 135
Configuring the Endpoint Settings 138
Configuring RADIUS Accounting Parameters 144
Configuring the FXO Parameters 145
Configuring Voice Mail (VM) Parameters 148
Protocol Management ini File Parameters 151
Advanced Configuration 157
Configuring the Network Settings 157
Configuring the IP Routing Table 166
Configuring the Media Settings 172
Restoring and Backing up the Gateway Configuration 186
Regional Settings 187
Security Settings 189
Configuring the Management Settings 198
Status & Diagnostics 210
Gateway Statistics 210
Activating the Internal Syslog Viewer 215
Device Information 216
Viewing the Ethernet Port Information 217
Monitoring the Gateway Channels (Home Page) 218
Viewing the Status of Channels 218
Adding a Port Description 220
Resetting a Channel 221
Software Update 221
Software Upgrade Wizard 221
Auxiliary Files 226
Maintenance 229
Locking and Unlocking the Gateway 229
Saving Configuration 231
Resetting the V7111 Gateway 232
Logging Off the Embedded Web Server 234
Readers Notes 235
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CHAPTER 6: INI FILE CONFIGURATION OF THE V7111 GATEWAY 237
Secured ini File 237
Modifying an ini File 238
The ini File Structure 238
The ini File Structure Rules 238
The ini File Example 239
Readers Notes 240
CHAPTER 7: USING BOOTP / DHCP 241
BootP/DHCP Server Parameters 241
Using DHCP 242
Using BootP 243
Upgrading the V7111 Gateway 243
Vendor Specific Information Field 243
Readers Notes 245
CHAPTER 8: TELEPHONY CAPABILITIES 247
Working with Supplementary Services 247
Call Hold and Retrieve 247
Consultation / Alternate 248
Call Transfer 248
Call Forward 249
Call Waiting 250
Message Waiting Indication 250
Configuring the DTMF Transport Types 251
Fax & Modem Transport Modes 252
Fax/Modem Settings 252
Configuring Fax Relay Mode 253
Configuring Fax/Modem Bypass Mode 253
Supporting V.34 Faxes 253
Supporting V.152 Implementation 254
FXO Operating Modes 255
IP-to-Telephone Calls 255
Telephone-to-IP Calls 260
ThroughPacket™ 263
Dynamic Jitter Buffer Operation 264
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Configuring the Gateways Alternative Routing (based on Connectivity and QoS) 265
Alternative Routing Mechanism 265
Determining the Availability of Destination IP Addresses 265
Relevant Parameters 266
Mapping PSTN Release Cause to SIP Response 266
Call Detail Record 266
Supported RADIUS Attributes 268
RADIUS Server Messages 270
Proxy or Registrar Registration Example 271
Configuration Examples 271
Establishing a Call between Two Gateways 271
SIP Call Flow 272
SIP Authentication Example 275
Remote IP Extension between FXO and FXS 277
Readers Notes 281
CHAPTER 9: NETWORKING CAPABILITIES 283
Ethernet Interface Configuration 283
NAT (Network Address Translation) Support 283
STUN 284
First Incoming Packet Mechanism 285
No-Op Packets 286
IP Multicasting 286
Point-to-Point Protocol over Ethernet (PPPoE) 286
Point-to-Point Protocol (PPP) Overview 286
PPPoE Overview 287
PPPoE in 3Com Gateways 288
Robust Reception of RTP Streams 289
Multiple Routers Support 289
Simple Network Time Protocol Support 290
IP QoS Using Differentiated Services (DiffServ) 290
VLANS and Multiple IPs 291
Multiple IPs 291
IEEE 802.1p/Q (VLANs and Priority) 291
Getting Started with VLANS and Multiple IPs 293
Readers Notes 298
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CHAPTER 10: ADVANCED SYSTEM CAPABILITIES 299
Restoring Networking Parameters to their Initial State 299
Establishing a Serial Communications Link with the V7111 Gateway 300
Automatic Update Mechanism 301
Startup Process 303
Using Parameter Tables 305
Table Indices 305
Table Permissions 306
Dynamic Tables vs. Static Tables 306
Secret Tables 306
Using the ini File to Configure Parameter Tables 307
Customizing the V7111 Web Interface 309
Replacing the Main Corporate Logo 309
Replacing the Background Image File 312
Customizing the Product Name 313
Modifying ini File Parameters using the Web AdminPage 313
Readers Notes 315
CHAPTER 11: SPECIAL APPLICATIONS - METERING TONES RELAY 317
Readers Notes 319
CHAPTER 12: SECURITY 321
IPSec and IKE 321
IKE 322
IPSec 323
Configuring the IPSec and IKE 323
SSL/TLS 332
SIP Over TLS (SIPS) 333
Embedded Web Server Configuration 333
Secured Telnet 334
Server Certificate Replacement 334
Client Certificates 336
SRTP 337
RADIUS Login Authentication 338
Setting Up a RADIUS Server 338
Configuring RADIUS Support 340
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Internal Firewall 342
Network Port Usage 344
Recommended Practices 345
Legal Notice 345
Readers Notes 346
CHAPTER 13: DIAGNOSTICS 347
Self-Testing 347
V7111 Gateway Line Testing 348
Syslog Support 349
Syslog Servers 350
Operation 350
Readers Notes 351
CHAPTER 14: SNMP-BASED MANAGEMENT 353
About SNMP 353
SNMP Message Standard 353
SNMP MIB Objects 354
SNMP Extensibility Feature 355
Carrier Grade Alarm System 355
Active Alarm Table 356
Alarm History 356
Cold Start Trap 356
Third-Party Performance Monitoring Measurements 357
Total Counters 358
Supported MIBs 358
Traps 361
SNMP Interface Details 362
SNMP Community Names 363
SNMP v3 USM Users 365
Trusted Managers 367
SNMP Ports 369
Multiple SNMP Trap Destinations 369
SNMP Manager Backward Compatibility 372
SNMP NAT Traversal 373
SNMP Administrative State Control 373
Node Maintenance 373
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Graceful Shutdown 374
3Com Element Management System 375
Readers Notes 376
CHAPTER 15: CONFIGURATION FILES 377
Configuring the Call Progress Tones and Distinctive Ringing File 377
Format of the Call Progress Tones Section in the ini File 377
Format of the Distinctive Ringing Section in the ini File 380
Prerecorded Tones (PRT) File 382
PRT File Format 382
The Coefficient Configuration File 383
User Information File 384
Readers Notes 386
CHAPTER 16: SELECTED TECHNICAL SPECIFICATIONS 387
V7111 1x PORT Specifications 387
V7111 24 PORT Specifications 391
Readers Notes 394
APPENDIX A: V7111 SIP SOFTWARE KIT 395
Readers Notes 396
APPENDIX B: SIP COMPLIANCE TABLES 397
SIP Functions 397
SIP Methods 397
SIP Headers 398
SDP Headers 400
SIP Responses 401
1xx Response – Information Responses 401
2xx Response – Successful Responses 401
3xx Response – Redirection Responses 402
4xx Response – Client Failure Responses 402
5xx Response – Server Failure Responses 404
6xx Response – Global Responses 404
Reader's Notes 405
APPENDIX C: BOOTP/TFTP CONFIGURATION UTILITY 407
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When to Use the BootP/TFTP 407
An Overview of BootP 407
Key Features 408
Specifications 408
Installation 408
Loading the cmp File, Booting the Device 409
BootP/TFTP Application User Interface 409
Function Buttons on the Main Screen 411
Log Window 411
Setting the Preferences 413
BootP Preferences 413
TFTP Preferences 414
Configuring the BootP Clients 415
Adding Clients 416
Deleting Clients 417
Editing Client Parameters 417
Testing the Client 417
Setting Client Parameters 418
Using Command Line Switches 419
Managing Client Templates 421
APPENDIX D: RTP/RTCP PAYLOAD TYPES AND PORT ALLOCATION 423
Packet Types Defined in RFC 3551 423
Defined Payload Types 424
Default RTP/RTCP/T.38 Port Allocation 424
Readers Notes 426
APPENDIX E: ACCESSORY PROGRAMS AND TOOLS 427
TrunkPack Downloadable Conversion Utility 427
Converting a CPT ini File to a Binary dat File 428
Encoding / Decoding an ini File 430
Creating a Loadable Prerecorded Tones File 431
Call Progress Tones Wizard 433
About the Call Progress Tones Wizard 434
Installation 434
Initial Settings 434
Recording Screen – Automatic Mode 435
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Recording Screen – Manual Mode 437
The Call Progress Tones ini File 438
Adding a Reorder Tone to the CPT File 440
APPENDIX F: SNMP TRAPS 441
Alarm Traps 441
Component: Board#<n> 442
Component: AlarmManager#0 446
Component: EthernetLink#0 447
Log Traps (Notifications) 448
Other Traps 449
Trap Varbinds 450
Readers Notes 452
APPENDIX G: INSTALLATION AND CONFIGURATION OF APACHE HTTP SERVER
453
Windows 2000/XP Operation Systems 453
Linux Operation Systems 454
Readers Notes 456
APPENDIX H: REGULATORY INFORMATION 457
Safety Notices 459
Telecommunication Safety 459
Industry Canada Notice 459
V7111 FXO Notice 460
Network Compatibility of FXO Ports 460
FCC Statement 460
ACTA Customer information 460
APPENDIX I: OBTAINING SUPPORT FOR YOUR 3COM PRODUCT 463
Customer Support 463
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A
BOUT
T
HIS
G
UIDE
This guide describes the use of the V7111 VoIP media gateways. The model numbers that
this manual supports are:
VCX V7111 VoIP Gateway 2 FXS (3CRVG71115-07)
VCX V7111 VoIP Gateway 4 FXS (3CRVG71110-07)
VCX V7111 VoIP Gateway 8 FXS (3CRVG71111-07)
VCX V7111 VoIP Gateway 24 FXS (3CRVG71112-07)
VCX V7111 VoIP Gateway 4 FXO (3CRVG71113-07)
VCX V7111 VoIP Gateway 8 FXO (3CRVG71114-07)
VCX V7111 VoIP Gateway 2 FXS, 2FXO (3CRVG71116-07)
VCX V7111 VoIP Gateway 4 FXS, 4 FXO (3CRVG71117-07)
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 /
Downloads & Drivers.
When viewing this manual 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
Chapter 2: V7111 Physical Description
Chapter 3: Installing the V7111
Chapter 4: Getting Started
Chapter 5: Web Management
Chapter 6: ini File Configuration of the V7111
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Chapter 7: Using BootP / DHCP
Chapter 8: Telephony Capabilities
Chapter 9: Networking Capabilities
Chapter 10: Advanced System Capabilities
Chapter 11: Special Applications - Metering Tones Relay
Chapter 12: Security
Chapter 13: Diagnostics
Chapter 14: SNMP-Based Management
Chapter 15: Configuration Files
Chapter 16: Selected Technical Specifications
Appendix
A: V7111 SIP Software Kit
Appendix B: SIP Compliance Tables
Appendix C: BootP/TFTP Configuration Utility
Appendix D: RTP/RTCP Payload Types and Port Allocation
Appendix E: Accessory Programs and Tools
Appendix F: SNMP Traps
Appendix G: Installation and Configuration of Apache HTTP Server
Appendix H: Regulatory Information
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.
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Related Documentation
The following documents are available on the 3Com Partner Access Web site for the 3Com
V7111 gateway:
900-0485-01 V7111 VoIP Gateway Installation Guide
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 V7111 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
Your name and organization (optional)
Example:
3Com VCX V7111 VoIP Gateway User Guide
Part Number 900-0486-01
Page 25
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 manual. Hexadecimal notation is indicated by 0x
preceding the number.
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V7111 refers to the V7111 24 PORT, V7111 18 PORT, V7111 14 PORT and V7111
12 PORT VoIP gateways.
V7111 1x PORT refers to the V7111 18 PORT, V7111 14 PORT and V7111 12
PORT VoIP gateways.
Where network appears in this manual, it means Local Area Network (LAN), Wide
Area Network (WAN), and the like accessed using the gateways Ethernet interface.
FXO (F
oreign Exchange Office) is the interface replacing the analog telephone and
connects to a Public Switched Telephone Network (PSTN) line from the Central
Office (CO) or to a Private Branch Exchange (PBX). The FXO is designed to receive
line voltage and ringing current, supplied from the CO or the PBX (just like an analog
telephone). An FXO VoIP gateway interfaces between the CO/PBX line and the
Internet.
FXS (F
oreign Exchange Station) is the interface replacing the Exchange (that is, the
CO or the PBX) and connects to analog telephones, dial-up modems, and fax
machines. The FXS is designed to supply line voltage and ringing current to these
telephone devices. An FXS VoIP gateway interfaces between the analog telephone
devices and the Internet.
WARNING:
Ensure that you connect FXS ports to analog telephone or to PBX-trunk lines only
and FXO ports to CO/PBX lines only.
The V7111 is supplied as a sealed unit and must only be serviced by qualified
service personnel.
Disconnect the V7111 from the mains and from the Telephone Network Voltage
(TNV) before servicing.
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C
HAPTER
1:
O
VERVIEW
This document provides you with the information on installation, configuration and operation
of the VoIP analog gateways listed in the table below:
Table 2 Supported Product Configurations
Product Name FXS FXO
Combined FXS /
FXO
Number of
Channels
V7111 24 PORT
9
8
8
24
V7111 18 PORT
9
9
4 + 4 8
V7111 14 PORT
9
9
2 + 2 4
V7111 12 PORT*
9
8
8
2
* The V7111 12 PORT differs from the V7111 14 PORT and V7111 18 PORT in that its configuration
excludes the RS-232 connector, the Lifeline option and outdoor protection.
As these units have similar functionality (with the exception of their number of channels and
some minor features), they are collectively referred to throughout this manual as the V7111.
Gateway Description
The V7111 series
analog VoIP gateways are cost-effective, cutting edge technology
products. These stand-alone analog VoIP gateways provide superior voice technology for
connecting legacy telephones, fax machines and PBX systems with IP-based telephony
networks, as well as for integration with new IP-based PBX architecture. These products are
designed and tested to be fully interoperable with leading softswitches and SIP servers.
The V7111 gateways incorporate up to 24 analog ports for connection, directly to an
enterprise PBX (FXO), or / and to phones, fax machines and modems (FXS), supporting up
to 24 simultaneous VoIP calls.
Additionally, the V7111 units are equipped with a 10/100 Base-TX Ethernet port for
connection to the network.
The V7111 gateways are best suited for small to medium size enterprises, branch offices or
for residential media gateway solutions.
The V7111 gateways enable users to make free local or international telephone / fax calls
between the 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 V7111 gateways are very compact devices that can be installed as a desk-top unit, on
the wall or in a 19-inch rack.
The V7111 gateways support SIP (Session Initiation Protocol) protocol, enabling the
deployment of voice over IP solutions in environments where each enterprise or residential
location is provided with a simple media gateway.
This provides the enterprise with a telephone connection (for example, RJ-11), and the
capability to transmit the voice and telephony signals over a packet network.
The layout diagram (
Figure 1), illustrates a typical V7111 VoIP application.
Figure 1 Typical V7111 VoIP Application
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SIP Overview
SIP (Session Initialization Protocol) is an application-layer control (signaling) protocol used
on the V7111 for creating, modifying, and terminating sessions with one or more participants.
These sessions can include Internet telephone calls, media announcements and
conferences.
SIP invitations are used to create sessions and carry session descriptions that enable
participants to agree on a set of compatible media types. SIP uses elements called Proxy
servers to help route requests to the user's current location, authenticate and authorize users
for services, implement provider call-routing policies and provide features to users.
SIP also provides a registration function that enables users to upload their current locations
for use by Proxy servers. SIP, on the V7111, complies with the IETF (Internet Engineering
Task Force) RFC 3261 (see
http://www.ietf.org).
V7111 Features
This section provides a high-level overview of some of the many V7111 supported features.
General Features
Superior, high quality Voice, Data and fax over IP networks.
Toll quality voice compression.
Enhanced capabilities including MWI, long haul, metering, CID and out door protection.
Proven integration with leading PBXs, IP-PBXs, Softswitches and SIP servers.
Spans a range of 2 to 24 FXS/FXO analog ports.
Selectable G.711 or multiple Low Bit Rate (LBR) coders per channel.
T.38 fax with superior performance (handling a round-trip delay of up to nine seconds).
Echo Canceler, Jitter Buffer, Voice Activity Detection (VAD) and Comfort Noise
Generation (CNG) support.
Comprehensive support for supplementary services.
Web Management for easy configuration and installation.
EMS for comprehensive management operations (FCAPS).
Simple Network Management Protocol (SNMP) and Syslog support.
SMDI support for Voice Mail applications.
ThroughPacket™ proprietary feature that aggregates payloads from several channels
into a single IP packet to reduce bandwidth overhead.
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Supports load balancing with proxy.
T.38 fax fallback to PCM (or NSE).
Can be integrated into a Multiple IPs and a VLAN-aware environment.
Capable of automatically updating its firmware version and configuration.
Secured Web access (HTTPS) and Telnet access using SSL / TLS.
IPSec and IKE protocols are used in conjunction to provide security for control (for
example, SIP) and management (for example, SNMP and Web) protocols.
Secured RTP (SRTP) according to RFC 3711, used to encrypt RTP and RTCP transport.
V7111 1x PORT Hardware Features
Combined FXS/FXO gateways (4 FXS and 4 FXO ports on the V7111 18 PORT; 2 FXS
and 2 FXO ports on the V7111 14 PORT).
V7111 1x PORT compact, rugged enclosure only one-half of a 19-inch rack unit, 1 U
high.
Lifeline - provides a wired phone connection to PSTN line when there is no power, or the
network fails (combined FXS/FXO gateways provide a Lifeline connection available on all
FXS ports).
LEDs on the front panel that provide information on the operating status of the media
gateway and the network interface.
Reset button on the rear panel that restarts the V7111 1x PORT gateway, and is also
used to restore the V7111 1x PORT parameters to their factory default values.
V7111 24 PORT Hardware Features
V7111 24 PORT 19-inch, 1U rugged enclosure provides up to 24 analog FXS ports,
using a single 50 pin Telco connector.
LEDs on the front and rear panels that provide information on the operating status of the
media gateway and the network interface.
Reset button on the front panel that restarts the V7111 24 PORT gateway, and is also
used to restore the V7111 24 PORT parameters to their factory default values.
SIP Features
The V7111 SIP gateway complies with the IETF RFC 3261 standard.
Reliable User Datagram Protocol (UDP) transport, with retransmissions.
Transmission Control Protocol (TCP) Transport layer.
SIPS using TLS.
/