vpacket 5100 Series User manual

Series 5100/6100™
Voice/Data Router
Reference Manual
H.323 Telephony

Trademarks and copyrights
All trademarks and registered trademarks listed belong to their respective owners.
Vpacket, Vpacket Communications, and the Vpacket 5100/6100 Series Voice/Data Router are registered trademarks of Vpacket
Communications, Inc., Milpitas, California.
Vpacket Communications, Inc. does not warrant that the hardware will work properly in all environments and applications, and makes no
warranty and representation, either implied or expressed, with respect to the quality, performance, merchantability, or fitness for a particular
purpose.
The products and programs described in this document are licensed products of Vpacket Communications, Inc. This document contains
proprietary information protected by copyright, and this document and all accompanying hardware, software, and documentation are
copyrighted. Vpacket Communications, Inc. has made every effort to ensure that this manual is accurate. However, information in this guide is
subject to change without notice and does not represent a commitment on the part of Vpacket Communications, Inc. Vpacket Communications,
Inc. makes no commitment to update or keep current the information in this document, and reserves the right to make changes to this manual
and/or product without notice. Vpacket Communications, Inc. assumes no responsibility for any inaccuracies and omissions that may be
contained in this document. If you find information in this document that is incorrect, misleading, or incomplete, we would appreciate your
comments and suggestions.
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Copyright © 2000-2002 by Vpacket Communications, Inc.™ U.S. Patents Pending. All Rights Reserved. Reproduction or media conversion by
any means is protected by copyright and may only occur with prior written permission of Vpacket Communications, Inc.
The PSQM technology included in this product is protected by copyright and by European, US, and other patents, and is provided under license
from OPTICOM Dipl. Ing. M. Keyhl GmbH, Erlangen, Germany, 2001
1390 McCarthy Boulevard
Milpitas, CA 95035
Tel: 1(866)VPACKET (872-2538)
Fax: [phone]
E-mail: [e-mail]
Web: http://www.vpacket.com
Document title Date issued Product number Release
Vpacket Series 5100/6100 Voice/Data Router Reference Manual
H.323 Telephony Configuration
June 2002 750-0033-001, Rev A 2.1.1
Vpacket Series 5100/6100 Voice/Data Router Reference Manual
SIP Telephony
750-0032-001, Rev A
Vpacket Series 5100/6100 Voice/Data Router Reference Manual MGCP
Configuration
750-0031-001, Rev A
Vpacket 5100/6100 Series Voice/Data Router Reference Manual
(Data Features)
750-0025-001, Rev A
Vpacket 5100/6100 Series Voice/Data Router Web Interface Manual 750-0035-001, Rev A

About this manual

About this manual
ii Vpacket 5100/6100 Series H.323 Telephony

Content summary
Vpacket 5100/6100 Series H.323 Telephony iii
Audience
This manual is written for the technical staff of a service provider, who are responsible for the
configuration of Vpacket 5100/6100 Voice/Data Router (VDR) telephony software. These users
include, but are not limited to, network technicians, systems administrators, and network
operation staff.
Content summary
This manual contains all of the information you need to configure the 5100/6100 VDR telephony
software running in an H.323 environment. Table 1 lists the chapters and appendixes and a
summary of each.
Table 1. Chapter summaries
Location Contents
Chapter 1 About H.323 Describes the H.323 environment and how to access the
telephony commands and H.323 command help
Chapter 2 T1 voice interface
commands
Describes how to configure a digital T1 voice interface
Chapter 3 TCID commands Describes TCID commands
Chapter 4 Coding profile
commands
Describes how to set fax related settings and coding profiles
Chapter 5 H.323 commands Describes the commands that configure the exchanges between
an H.323 gatekeeper and the 5100/6100 VDR
Chapter 6 Address Translation
Parsing Module (ATPM)
Explains how to configure a dial plan, hunt groups, and
destination lists
Chapter 7 Call quality
commands
Describes commands related to voice quality
Chapter 8 Default coding
profiles
Lists the 9 default coding profiles

About this manual
iv Vpacket 5100/6100 Series H.323 Telephony
Conventions
This manual uses typeface, syntax, and messages to alert you to information of special interest.
Typefaces
Table 2 lists the typefaces that are used in this manual.
Command syntax
The syntax of commands is described using the following conventions:
• Angle brackets (<fill_in_the_blank >) denote required parameters or arguments.
• Square brackets ([ ]) denote optional elements.
• A pipe (|) separates choices.
Messages
Notes, cautions, and warnings are posted throughout the manuals to give supplementary
information and encourage safety awareness and safe practices.
Notes
Notes are supplemental information requiring your attention.
For example:
Note. Please remember to go to the Vpacket Web site and complete the online
Warranty Registration Card. Doing so registers your Vpacket 5100/6100 VDR and
allows you to receive the latest information, technical support, and upgrades
applicable to your unit.
Table 2. Typefaces and their meanings
Typeface Description
Bold Designates menus, commands, and parameters
Courier Designates output resulting from a command issued by a user and messages
issued via a telnet or terminal-emulation screen

Related documentation
Vpacket 5100/6100 Series H.323 Telephony v
Cautions
Cautions are information requiring extra attention.
For example:
Caution. No system-level confirmation message appears during the deletion.
Warnings
Warnings are information that, if not followed, could result in injury or equipment damage.
For example:
Warning. Use of longer screws could result in damage to internal components.
Related documentation
The documentation set related to the Vpacket 5100/6100 VDR includes all documents on the
CD-ROM that was shipped with the unit:
•Vpacket 5100/6100 Series Voice/Data Router Installer’s Guide, Release 2.1 (P/N 750-00??-001)
•QuickStartGuides
•T1 and dual T1 Quick Start Guide
•SDSL Quick Start Guide
•Ethernet WAN Quick Start Guide
•T1-PRI Voice Quick Start Guide
•Vpacket 5100/6100 Series Voice/Data Router Datasheet
The reference manual is broken down into five sections allowing you to print only the sections
that apply to your network environment:
•Vpacket 5100/6100 Series Voice/Data Router Reference Manual (Data Features)
• Vpacket 5100/6100 Series Voice/Data Router MGCP Telephony Configuration
• Vpacket 5100/6100 Series Voice/Data Router SIP Telephony Configuration
•Vpacket 5100/6100 Series Voice/Data Router H.323 Telephony Configuration
•Vpacket 5100/6100 Series Voice/Data Router Web Reference
!
WARNING

About this manual
vi Vpacket 5100/6100 Series H.323 Telephony
Contact information
For more information about the Vpacket 5100/6100 Series VDRs, please contact us using any of
the following methods.
Voice calls
We welcome your calls at 1(866) 872-2538 (VPACKET) Monday through Friday, from 9:00 am to
6:00 pm Pacific Time. Voice mail is available during non-business hours.
E-mail
If you prefer, you can send information requests to our e-mail address: [email protected]
Fax number
You can also send your requests for information to our 24-hour fax number:
1(408) 433-5870
Website
Our website contains valuable information about our products. We encourage you to visit us at
http://www.vpacket.com

Contents
Vpacket 5100/6100 Series H.323 Telephony vii
About H.323 1
H.323 and voice services over IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Setting up voice ports for H.323 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Coding profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
TCID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Activating and storing configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Evaluating call quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Accessing the telephony commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Accessing help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Viewing the DSP version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
T1 voice interface commands 9
T1 voice interface commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Viewing the T1 configuration settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Setting the T1 frame mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Setting the T1 line coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Setting the T1 clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Setting the T1 loopback. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TCID commands 15
TCID commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Setting the TCID mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Setting the preferred voice coding profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Setting the preferred fax coding profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Setting the companding law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Setting the caller ID name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Setting the caller ID time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Setting the protocol type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Setting the FXS off hook level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Setting the on hook level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Setting the seize detect parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Setting the originator clear detect parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Setting the answer-side clear detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

viii Vpacket 5100/6100 Series H.323 Telephony
CONTENTS
Coding profile commands 27
Coding profile command list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Assigning codecs to coding profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Setting the coding usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Setting the fax data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Setting the fax packet rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Setting the packet-level redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Setting the high-speed redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Setting the fax transmission method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
H.323 commands 35
H.323 configuration commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Setting the H.323 gatekeeper operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Setting the H.323 gatekeeper address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Creating and deleting H.323 gatekeeper aliases . . . . . . . . . . . . . . . . . . . . . . . . . 39
Setting the H.323 fast start mode for the outgoing side . . . . . . . . . . . . . . . . . . . . 39
Setting the H.323 fast start mode for the incoming side. . . . . . . . . . . . . . . . . . . . 40
Viewing H.323 display name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Viewing the H.323 H.245 term type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Viewing the H.323 RTP port base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Viewing the fast start setting on the outgoing call handling . . . . . . . . . . . . . . . . . 41
Viewing the incoming call handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Viewing the H.323 auto answer configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Viewing the H.323 gatekeeper mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Viewing the H.323 gatekeeper address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Address Translation Parsing Module (ATPM) 45
Storing and activating ATPM configurations . . . . . . . . . . . . . . . . . . . . . . 47
Generating an ATPM Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
ATPM Telephone Address to Hunting Group Table . . . . . . . . . . . . . . . . 48
Creating a hunt group ID to destination ID mapping table . . . . . . . . . . . . . . . . . . 51
Destinations list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
System Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Viewing the system-wide ATMP parameters . . . . . . . . . . . . . . . . . . . . . 54

Vpacket 5100/6100 Series H.323 Telephony ix
Call quality commands 57
Call quality commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Enabling or disabling the Call Detail Record feature . . . . . . . . . . . . . . . . . . . . . . 59
Viewing Call Detail Records. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Deleting CDR information from the Flash memory. . . . . . . . . . . . . . . . . . . . . . . . 61
Viewing CDR statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

CHAPTER II
x Vpacket 5100/6100 Series H.323 Telephony

Contents
1
About H.323
Overview, page 3
H.323 and voice services over IP, page 3
Setting up voice ports for H.323, page 3
Evaluating call quality, page 5
Accessing the telephony commands, page 6
Accessing help, page 6
Viewing the DSP version, page 7

CHAPTER 1
About H.323
2 Vpacket 5100/6100 Series H.323 Telephony

H.323 and voice services over IP
Vpacket 5100/6100 Series H.323 Telephony 3
Overview
This chapter describes the capability of the 6100 VDR to support IP telephony and the basic
procedures for supporting the voice ports using the Command Line Interface (CLI).
This chapter contains three sections:
• Background information about IP telephony based on H.323
• A description of the uses of telephony channels (TCIDs) and their coding profiles for
encoding the characteristics of traffic flow
• Procedures for entering the telephony command shell and accessing help
H.323 and voice services over IP
The basic conditions that required bringing together data and voice routing capabilities were the
development of specialized telephonic applications connecting LAN devices, across a WAN, and
with interfaces to the PSTN. These required attention to several key areas:
• Operational differences between packet-switched and circuit-switched environments
• Major issues revolving on the management of bandwidth, QoS, and latency
These required the development of protocols capable of managing:
• Audio compression to reduce bandwidth
• Sensitivity to latency on the audio path–a 200ms round trip is considered acceptable
• Use jitter buffers and codecs that minimize the network impacts
H.323 is an “umbrella standard” that encompasses many subordinate standards and allows the
reuse of existing data and telecommunications standards such as Q.931. H.323 defines a flexible
means for multimedia teleconferencing equipment to communicate and provides application-
sharing features over an IP stack using a variety of devices including videophones, desktop PCs,
and multiport gateways.
Note. G.726 is not supported in H.323.
Setting up voice ports for H.323
To enable voice services, you must individually set up each voice port. Each voice port needs to
have telephony channel identifier (TCID) parameters configured, a set coding profile and then
any coding profile parameters need to be configured.

CHAPTER 1
About H.323
4 Vpacket 5100/6100 Series H.323 Telephony
Note. Vpacket strongly recommends that you use the supplied coding profiles listed in
Appendix D for initial configuration and system tests. Only when network quality
characteristics have been benchmarked and systematically tested, you can proceed
with customizing them.
Coding profiles
Coding profiles are configuration files that consist of numbered sets of parameters that control
the characteristics of the voice and fax traffic over the DSP channels. You can assign at least one
but usually two coding profiles (one for voice and one for fax) to a TCID as a way of providing
quick definition of services over that channel.
Coding profiles can be used by any TCID assigned to a port on a 6100 VDR but only one at a
time.
Vpacket has supplied eight default coding profiles, six for voice and two for fax. Each coding
profile uses one of the major industry standard codecs, including G.711 (A-law 64 kbps), G.711m-
law, G.723 5.3, G.723 6.3, G.726 (ADPCM), and G.729ab as well as two versions of T.38 fax.
Based on these coding profiles, you can create additional coding profiles for a maximum of 32
coding profiles.
Note. G.726 is not supported in H.323.
When the VDR first boots up, all TCIDs are assigned the default coding profile 0 (G.711m- law).
TCID
The TCID represents the telephony (logical) channel associated with each analog port. They are
numbered as integers from 0 to (the number of voice ports on the VDR minus 1). For example,
the 24-port VDR (either 24 analog FXS ports or 24 channels in T1-CAS) has a TCID range of 0-
23.
Figure 1-1 shows the 6100 voice ports, voice port numbers, TCID numbers, and coding profiles.

Evaluating call quality
Vpacket 5100/6100 Series H.323 Telephony 5
Figure 1-1. Relationship between voice ports, TCID, and coding profiles
Activating and storing configurations
When a command is issued, it is placed in a temporary storage area where it can be stored or
removed by user operation. To implement a change, that command must be stored in Flash
memory with the activate command and then stored in the configuration file with a commit
command so when the VDR is rebooted it is part of the current configuration. When a sequence
of commands is entered and processed, it changes the values of the affected parameters in a
temporary area, but this does not affect current operation which uses values in the active area.
When you issue the activate command, the new configuration data is moved from the temporary
area to the active area, where it can actually be used. Thus a user can make multiple changes in the
temporary area, for example, using set coding commands, then put them into use with a single
activate command.
Use the activate command only between calls since when it is invoked, it tears down (disrupts)
any calls that are in progress.
Configuration data in the active area is only available while the software platform remains in
operation. If the reset command is issued, or if the platform is manually reset, the active area is
reloaded from the data stored in Flash memory. Data in the active area may be saved to Flash
memory by entering the commit command.
Evaluating call quality
H.323 support includes Call Detail Record (CDR) functionality. CDR records every successful
phone call which is placed through the VDR. Each successful phone call will have one record in
the CDR list. The System Administrator can extract and review detailed records concerning
phone quality and also can access these records for billing purposes.
12345 678910 11 12 13 14 15 16 17 18 19 20 21 22 23 24
TCID 0 TCID 23
TCID 11
Coding profile 1
voice
fax
voice
voice
fax
fax
Coding profile 1
Coding profile 1
2
2
2
5100/6100 VDR voice ports

CHAPTER 1
About H.323
6 Vpacket 5100/6100 Series H.323 Telephony
Accessing the telephony commands
The H.323 commands are available within the command line interface (CLI) under the telephony
command shell. Once you establish connectivity to the 6100 VDR either through a
HyperTerminal session or a telnet session, you can access the telephony shell by entering tel and
pressing the Enter key (Figure 1-2).
Figure 1-2. Entering the telephony command shell
Accessing help
Once inside the telephony command shell, you can view a listing of H.323 commands by entering
either the set or show keywords (Figure 1-3).
Figure 1-3. Viewing H.323 help
If you enter a two word combination, you can view the entire list of available commands within
that group. The list contains both basic and advanced commands; so, it is possible to change
parameters that might adversely affect a network.
The commands are listed by group:
• Show commands
• Coding profile parameter command
• TCID parameter commands (including loop start options)
• T1 parameter commands
• H.323-specific commands
• Call quality commands
VPacket# tel
telephony#
VPacket# tel
telephony# set
set tcid
set coding
set h323
VPacket#

Viewing the DSP version
Vpacket 5100/6100 Series H.323 Telephony 7
Viewing the DSP version
You can view the character string that identifies the version of the DSP software by issuing the
show dsp_version command.
Syntax: show dsp_version [dsp]
Argument:
dsp the number of the DSP you want to view information about
Example:
In this example, the DSP information is shown.
MXP>show dsp_version 1
DSP Version: 6.2.3.107, Voice & Fax, @Small, C548F/C549F, Codecs 0xffd2, Features
0x1fe

CHAPTER 1
About H.323
8 Vpacket 5100/6100 Series H.323 Telephony