RADVision L2W-323 User manual

P/N 61285-00001 Rev A
L2W-323 GATEWAY
User Guide

Notice
© 1999 RADVision Ltd. All intellectual property rights in this publication are owned by
RADVision Ltd. and are protected by United States copyright laws, other applicable copyright
laws and international treaty provisions. RADVision Ltd. retains all rights not expressly
granted.
No part of this publication may be reproduced in any form whatsoever or used to make any
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RADVision Ltd. reserves the right to revise this publication and make changes without
obligation to notify any person of such revisions or changes. RADVision Ltd. 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 publication, it is furnished
under a license agreement included with the product as a separate document. If you are
unable to locate a copy, please contact RADVision Ltd. and a copy will be provided to you.
Unless otherwise indicated, RADVision registered trademarks are registered in the United
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Microsoft and Windows are registered trademarks of the Microsoft Corporation. Other brands
and their products are trademarks or registered trademarks of their respective holders and
should be noted as such.
L2W-323 Gateway 2.0 User Guide Ed. 1, October 1999.
RADVision Ltd.:
24 Raul Wallenberg
Tel Aviv 69719, Israel
Tel: [phone]
Fax: [phone]
Video: [phone]
email: [email protected]
RADVision Inc.:
575 Corporate Drive
Mahwah, NJ 07430, USA
Tel: [phone]
Fax: [phone]
Video: [phone], [phone]
email: [email protected]
http://www.radvision.com

i
Contents
About this User Guide
Finding Specific Information ix
Conventions x
Related Documentation x
Year 2000 Compliance x
Introducing the L2W-323 Gateway
Introducing the L2W-323 Gateway 1-1
Gateway Features 1-2
Version 2.0 1-2
Version 1.3 1-2
Internal Gatekeeper Features 1-3
Gateway Physical Description 1-4
Front Panel 1-4
Rear Panel 1-5
Overview
The OnLAN 323 Product Series 2-1
OnLAN 323 Product Collaboration 2-2
L2W-323 Gateway and MCU-323 2-2
L2W-323 Gateway and VIU-323 2-3
An Introduction to H.323 2-4
What is the H.323 Standard? 2-4
H.323 Network Components 2-4
Integrating the L2W-323 Gateway into Your Network 2-6
Multimedia Conferencing Application 2-6
Voice Over IP (VoIP) Application 2-7
Types of Connections 2-8
Understanding the L2W-323 Gateway 2-11
The L2W-323 in the H.323 Network 2-11
H.323 Version 2 Support 2-15
Call Setup Supported Features 2-15

Contents
ii
Understanding the Internal Gatekeeper 2-16
How the RADVision Gatekeeper Works 2-16
Working with Several Gatekeepers 2-20
Optimizing Call Routing on the H.323 Network 2-21
Call Transfer 2-23
Installing the L2W-323 Gateway
Package Contents 3-1
Site Considerations 3-1
Installing the WAN Modules 3-2
Unpacking the Module 3-3
Safety Precautions 3-3
Inserting the Module 3-3
Uploading the BRI Module Driver 3-4
Mounting the Gateway in a 19-inch Rack 3-4
Installing More than One Unit 3-5
Connecting the Cables 3-5
Power Connection 3-5
LAN Connection 3-6
WAN Connection 3-7
Checking for Correct Operation 3-9
Connecting to the Console Port 3-9
Next Step: Configuration 3-12
Preparing for Configuration
Planning the Configuration 4-1
Prerequisites 4-1
Setting Up the Configuration Station 4-3
Running Setup 4-4
Installing the RADVision OnLAN Tools 4-4
Navigating the Configuration Software Screens 4-7
Assigning an IP Address to a New Gateway 4-9

Contents
iii
Basic Configuration
Basic Configuration Options 5-1
Selecting the Gateway Unit 5-2
Assigning an IP Address 5-3
Accessing the Unit Configuration 5-3
Modifying the Password 5-6
Setting the Gatekeeper Mandatory Parameters 5-8
Accessing the Internal Gatekeeper Parameters 5-8
Defining Gatekeeper Services 5-10
Disabling the Gatekeeper Function 5-12
Setting Parameters for an External Gatekeeper 5-13
Setting the Gateway Parameters 5-14
Selecting the Configuration Source File 5-14
Setting Unit Identification Parameters 5-15
Setting Miscellaneous Parameters 5-16
Setting Miscellaneous WAN Parameters 5-20
Setting LAN Port Parameters 5-21
Setting Gateway Services 5-23
Setting WAN Port Parameters 5-26
Saving and Uploading the Gateway Parameters 5-39
Making a Call Through the L2W-323 Gateway 5-41
Advanced Gatekeeper Configuration
Overview 6-1
Advanced Services Definition 6-1
Defining Gatekeeper Built-in Services 6-2
Service Access Control 6-3
Single Number Access to a Group of Terminals 6-4
Internal Gatekeeper Service Files 6-5
Editing the Gatekeeper Default Services 6-5
Deleting and Adding Gatekeeper Services 6-6
Saving the Service Definitions to a File 6-6

Contents
iv
Zone Definition 6-7
Zone Access Control 6-7
Displaying the Zone Definition Table 6-9
Adding a New Endpoint 6-12
Editing an Existing Endpoint 6-16
Deleting Endpoints 6-19
Saving the Data of the Zone Definition Table 6-20
Loading a Data File to the Zone Definition Table 6-20
Multiple Zones 6-21
Displaying the Neighbor Gatekeepers Table 6-21
Network Topology 6-24
Displaying the Network Topology Table 6-25
Network Control 6-28
Setting Alias Assignment 6-32
Distance Settings 6-32
Disabling the Gatekeeper Function when there are Ongoing Calls 6-34
Using the L2W-323 Gateway
Overview 7-1
Internetwork Dialing 7-2
Dialing Out to the WAN through the Gateway 7-2
Dialing In to the LAN through the Gateway 7-5
Intranetwork Dialing 7-9
Dialing from One LAN Endpoint to Another 7-9
Making Voice Calls over the IP Network 7-14
Far End Camera Control 7-16
Servicing the Gateway
Uploading Files to the Gateway 8-1
Running the Software Upload Utility 8-1
Changing IVR Messages 8-4
The Default IVR Recorded Messages 8-4
Running the IVR Recording Utility 8-5
Playing the Recorded IVR Recordings 8-5
Editing the Default IVR Message 8-6

Contents
v
Upgrading the ISDN BRI WAN Module Driver 8-12
Monitoring the Gateway 8-12
Accessing the Diagnostic Menus 8-12
Prerequisites 8-12
Creating a Dial-Up Connection to the Gateway 8-13
Running the Diagnostics Utility 8-13
Diagnostics Menus 8-14
Troubleshooting the L2W-323 Gateway
LED Indications 9-1
Problems Accessing the L2W-323 Gateway 9-2
From a Configuration PC on the LAN 9-2
From the Console Port 9-3
Problems Using the L2W-323 Gateway 9-4
Making Calls 9-4
Receiving Calls 9-7
Changing the Password 9-10
IP Address Problems 9-11
Defining IP Addresses via a Terminal Session 9-11
Cable Connectors and Pin-outs
RJ-45 LAN Port A-1
LAN 10/100Base-T RJ-45 Connector A-1
Straight-Through Ethernet Cable A-1
Crossover Ethernet Cable A-2
ISDN “S” Interface A-2
RJ-45 8-pin Receptacle Pin-out A-2
Serial Connector and Null Modem Cable A-3
RS-232 9-pin Connector Pin Out A-3
Null Modem Cable A-4
Safety Considerations
Safety Considerations B-1
High Voltage B-1
Grounding B-1

Contents
vi
IP Addressing
IP Addressing Scheme C-1
Subnets and Using a Subnet Mask C-2
Hexadecimal Notation C-3
Technical Specifications
Interfaces D-1
Operating Bit Rate D-1
Protocols D-1
Switched Protocols D-1
Audio Coding D-1
LEDs D-2
Physical Dimensions D-2
Power Supply D-2
Environmental Requirements D-2
Certifications D-2
FCC Part 68 Customer Instructions
FCC and Industry Canada Compliance E-1
FCC Registration and Requirements E-1
Service E-1
FCC Rules, Part 15 E-1
FCC Rules, Part 68 E-1
Equipment Attachment Limitations E-4
Ringer Equivalence Number (REN) E-4
Equipment Attachment Limitations E-4
Glossary
Index

Contents
vii
Table of Figures
Figure 1 - L2W-323 front panel..................................................................................................1-4
Figure 2 - L2W-323 Gateway rear panel ................................................................................... 1-5
Figure 3 - WAN module combinations....................................................................................... 1-6
Figure 4 - Mixed WAN-LAN multipoint multimedia conference.................................................. 2-2
Figure 5 - H.320 room system communicating with an H.320 terminal on the WAN.................2-3
Figure 6 - Multimedia conferencing via the Gateway................................................................. 2-6
Figure 7 - Voice over IP communication via Gateways ............................................................. 2-7
Figure 8 - Connecting more than one L2W-323 Gateway LAN port..........................................2-8
Figure 9 - Using islands for fast service call routing on the LAN ............................................. 2-22
Figure 10 - Rear Panel with a BRI and a V.35 module..............................................................3-3
Figure 11 - Fitting a bracket for rack mounting.......................................................................... 3-4
Figure 12 - Assigning an IP address to a new Gateway............................................................ 4-9
Figure 13 - Select Unit screen................................................................................................... 5-2
Figure 14 - Enter Password Screen ..........................................................................................5-4
Figure 15 - Configuration Source screen................................................................................... 5-4
Figure 16 - Software Version screen......................................................................................... 5-6
Figure 17 - Change Password screen....................................................................................... 5-7
Figure 18 – The Application Parameters screen, for Gatekeeper configuration........................5-8
Figure 19 - Gatekeeper Services Definition Table screen with default services...................... 5-11
Figure 20 - Network Control screen......................................................................................... 5-12
Figure 21 - Selecting the source file for the Gateway configuration parameters ..................... 5-14
Figure 22 - Unit Identification screen....................................................................................... 5-15
Figure 23 - Miscellaneous Parameters screen........................................................................5-16
Figure 24 - Presentation Restricted Support parameter.......................................................... 5-19
Figure 24a - Miscellaneous WAN Parameters......................................................................... 5-20
Figure 25 - LAN Port Settings screen...................................................................................... 5-21
Figure 26 - LAN Parameters screen........................................................................................ 5-22
Figure 27 - Gateway Services Definition Table screen............................................................ 5-23
Figure 28 - Defining service settings ....................................................................................... 5-25
Figure 29 - WAN Port Settings – ISDN screen (SPID disabled).............................................. 5-27
Figure 30 - WAN Port Settings – ISDN screen (SPID enabled)............................................... 5-28
Figure 31 - SPIDs for the BRI connection................................................................................ 5-29
Figure 32 - Directory numbers for the BRI connection ............................................................5-30
Figure 33 - WAN Call Parameters screen ............................................................................... 5-31
Figure 34 - Supported Services screen................................................................................... 5-33
Figure 35 - Advanced parameter settings for the ISDN BRI port.............................................5-34
Figure 36 - WAN Port Settings screen for a V.35 port............................................................. 5-36

Contents
viii
Figure 37 - WAN Parameters screen.......................................................................................5-38
Figure 38 - Saving the Gateway configuration parameters to a file .........................................5-39
Figure 39 - Gatekeeper Services Definition Table screen .........................................................6-2
Figure 40 - Services Definition screen.......................................................................................6-3
Figure 41 - Everyone can Register option in the Network Control screen .................................6-8
Figure 42 - Zone Definition table .............................................................................................6-10
Figure 43 - Predefined Properties screen................................................................................6-12
Figure 44 - Allowed Services screen .......................................................................................6-14
Figure 45 - Online Properties screen.......................................................................................6-17
Figure 46 - Supported Services screen for a Gateway............................................................6-18
Figure 47 - Neighbor Gatekeepers Table screen.....................................................................6-22
Figure 48 - Neighbor GK Parameters screen ..........................................................................6-23
Figure 49 - Network Topology Table screen............................................................................6-25
Figure 50 - Subnet Parameters screen....................................................................................6-26
Figure 51 - Network Control screen.........................................................................................6-28
Figure 52 - Advanced Settings screen.....................................................................................6-31
Figure 53 - Making voice calls with ISDN/PSTN phones over an IP network ..........................7-14
Figure 54 - Software Upload Utility window for OnLAN L2W-323..............................................8-2
Figure 55 - Upload Status Window for the OnLAN L2W-323.....................................................8-3
Figure 56 - The RADVision IVR Recording Utility......................................................................8-5
Figure 57 - Software Upload Utility window showing IVR flash file..........................................8-10
Figure 58 - Straight-through Ethernet cable...............................................................................A-1
Figure 59 - Crossover Ethernet cable........................................................................................A-2
Figure 60 - Null modem connectors...........................................................................................A-4
Figure 61 - Null modem cable....................................................................................................A-5
Figure 62 - IP address classes, their identifying bits and the prefix/suffix division.................... C-1
Figure 63 - Class C subnet mask.............................................................................................. C-3

About this User Guide
ix
About this User Guide
This guide provides all the information you need to install, configure and manage the
L2W-323 Gateway, with or without the internal Gatekeeper. It describes the Gateway with
software version 2.0 and higher (and configuration software version 1.7. and higher).
This guide is intended for use by network administrators who are responsible for installing
and setting up network equipment. It assumes a basic working knowledge of LANs.
Finding Specific Information
This table shows where to find specific information in this guide.
If you are looking for… Go to…
A summary of the Gateway features or its physical
description. Chapter 1
An introduction to H.323 and H.323 network components,
Gateway applications, collaboration with other RADVision
products, and descriptions of how the Gateway and
Gatekeeper work.
Chapter 2
Installation procedures, and a description of the power-up
sequence. Chapter 3
Recommendations on how to plan the configuration, and
information on running Setup, and installing and using the
Configuration software.
Chapter 4
Procedures for configuring the Gateway and Gatekeeper to
support the Gateway. Chapter 5
Advanced configuration options for the Gatekeeper. Chapter 6
Procedures for making calls using the Gateway. Chapter 7
Information about changing the IVR messages and
monitoring the Gateway. Chapter 8
Solutions to problems you may encounter installing,
configuring and managing the Gateway. Chapter 9
Cable pin-out diagrams, safety information, technical
specifications, IP addressing information, and a list of terms
used in this guide.
Appendices and Glossary

About this User Guide
x
Conventions
The following table lists the visual conventions used throughout this guide.
Convention Description
Gateway/gateway;
Gatekeeper/gatekeeper When capitalized, Gateway and Gatekeeper refer to the RADVision L2W-323 Gateway and the RADVision Gatekeeper.
Otherwise, they refer to the H.323 gateways and gatekeepers in
general.
Note: Information note that describes important features or instructions.
Warning: Information that alerts you to potential danger to yourself or the
Gateway.
Menu commands,
buttons and text-
boxes
Menu commands, button names and text-boxes appear in bold.
Glossary terms The first time a Glossary entry appears in the text, it is bolded.
Related Documentation
The L2W-323 Gateway documentation set includes a Quick Start Guide providing
information for installing and configuring the L2W-323 Gateway for the first time.
Year 2000 Compliance
For information on Year 2000 compliance and RADVision products, see the Products
section of the RADVision Web site at http://www.radvision.com.

1
Introducing the L2W-323 Gateway
This chapter introduces the L2W-323 Gateway. It covers the following
topics:
!"Introducing the L2W-323 Gateway
!"Gateway Features
!"Internal Gatekeeper Features
!"Gateway Physical Description

1-1
Introducing the L2W-323 Gateway
The RADVision L2W-323 Gateway is an essential network component for allowing the
exchange of audio, video and data between H.323-based conferencing systems on IP
networks and H.320 or voice-compliant systems on circuit-switched ISDN networks.
The RADVision L2W-323 Gateway translates between the H.323 and the H.320 protocols
interconnecting, via ISDN, voice and videoconferencing clients on IP networks to:
!" Voice and videoconferencing clients on other IP networks.
!" ISDN-compliant legacy H.320 videoconferencing Room Systems.
!" Telephones on the ISDN or the Public Switched Telephone Network (PSTN) network.
The RADVision L2W-323 Gateway has an internal Gatekeeper. Together, the Gateway
and the Gatekeeper provide an integrated solution with the functionality of a multimedia
Private Branch Exchange (PBX).

Introducing the L2W-323 Gateway
1-2
Gateway Features
Version 2.0
In addition to the Version 1.3 features (see next section), the L2W-323 Gateway Version 2.0
contains the following new features:
!" Supports H.323 Version 2.
!" Supports Bonding Mode 1 of 128, 256 and 384 Kbps for video calls (2, 4 or 6 x 64
Kbps) and lets you set the maximum call bandwidth when bonding is enabled.
!" Supports 768 Kbps (using the V.35 interface) for up to four video and data calls.
!" Supports varying default bandwidths (between 64 and 768 Kbps) for incoming calls,
when the Gateway is defined as DCE.
!" Supports far end camera control (FECC) by tunneling H.281.
!" Provides faster T.120 (up to 70.4 Kbps).
!" Provides four voice transcoders.
!" Provides Fast Ethernet support (10/100Base-T).
!" Provides password protection for FTP and Telnet access (remote diagnostics).
!" Supports multicast discovery for the gatekeeper.
Version 1.3
The L2W-323 Gateway has the following features:
!" An embedded system.
!" One or two of the following WAN modules in any combination:
!" ISDN BRI (providing two BRI connections).
!" V.35 DTE (providing two V.35 connections, with RS-366 or V.25bis dialing or
dedicated connections).
!" V.35 DCE (providing two V.35 connections, with RS-366 or V.25bis dialing or
dedicated connections).
!" Supports up to eight simultaneous voice calls (using ISDN BRI modules) and up to
four simultaneous high-quality video and data calls of up to 768 Kbps (using V.35
modules).
!" Internal H.323 Gatekeeper.

Internal Gatekeeper Features
1-3
!" Supports Direct Inward Dialing (DID) – routing incoming calls to H.323 endpoints
without operator intervention – through one of the following:
!" Multiple Subscriber Numbering (MSN).
!" TCS4, for H.320 video and data calls only.
!" Default Extension, when an H.323 endpoint is defined as the default extension.
!" Indirect inward dialing via Internal Interactive Voice Response (IVR), with Dual Tone
Multi-Frequency (DTMF) detection of up to eight simultaneous calls.
!" RS-232 console port (serial port), supporting local or remote connection for
monitoring, configuration and diagnostics.
!" Audio transcoding support: G.711 ↔
↔↔
↔G.723.1 and G.728 ↔
↔↔
↔G.711 for up to four
simultaneous calls. This is an optional feature.
!" Supports line echo cancellation.
!" Front panel LED display.
!" Self test during power on.
!" No user intervention required for operation.
!" Simple configuration and setup via a Windows application.
!" Diagnostics feature.
!" Replaceable and modifiable IVR messages using the IVR Recording utility.
!" Easy software upgrades from a remote site using TFTP into flash memory.
!" T.120 support.
!" Auto detection of call bit rate (using the V.35 module).
Internal Gatekeeper Features
The internal H.323 Gatekeeper has the following control and administration features:
!" Address resolution between endpoint IP addresses and names or phone numbers.
!" Control of the Gateway and LAN resource usage through the following parameters:
!" Bandwidth used by all H.323 sessions.
!" Bandwidth used by a single H.323 endpoint.
!" The number of simultaneous calls.
!" Service availability per LAN endpoint.
!" Logical distance dialing limitations.

Introducing the L2W-323 Gateway
1-4
!" Supports the following call services:
!" Gateway hunting: automatic routing of call requests to Gateways with available
resources.
!" Group hunting: allows single phone number access to a group of LAN terminals.
!" Call forwarding: allows LAN terminals to forward their calls to another terminal
or to a Gateway.
!" Supports up to 25 simultaneous calls.
!" Supports the registration of up to 150 endpoints.
!" Supports optional zone management through the definition of terminals.
!" Supports multiple gatekeeper operation for large networks.
!" Supports logical network division for optimal call routing.
!" Supports multicast discovery for the gatekeeper.
Gateway Physical Description
This section describes the physical features of the L2W-323 Gateway front and rear panels.
Front Panel
The front of Gateway provides the front panel LEDs and the console port for terminal or
modem connection.
Figure 1 - L2W-323 front panel