3Com NBX 100, SUPRSTACK 3 NBX Administrator Guide

NBX® Administrator’s Guide

Release 4.1

■ SuperStack 3 NBX

■ NBX 100

http://www.3com.com/

Part No. 900-0093-01
Published: January 2003

3Com Corporation
5400 Bayfront Plaza
Santa Clara, California
95052-8145

Copyright © 2002, 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.

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

Adobe is a trademark and Adobe Acrobat is a registered trademark of Adobe Systems Incorporated. 5ESS is a
registered trademark and 4ESS is a trademark of Lucent Technologies. Microsoft, Windows, Windows 2000,
and Windows NT are registered trademarks of Microsoft Corporation.

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

CONTENTS

ABOUT THIS GUIDE

How to Use This Guide 15
Conventions 16
International Terminology 16
Documentation 16

Your Comments 16

1 INTRODUCTION

Network-based Telephony 19
Overview of the System Software 20

Auto Attendant 20
Auto Discovery and Auto Relocation 20
Virtual Tie Lines 20
Integrated Voice Mail and Messaging Features 20
Redialing From Call Logs 21

Call Recording 21
NBX NetSet Administration Utility 22
NBX NetSet Features 23

2 DIAL PLAN

Dial Plan Concepts and Overview 28

Call Process Flow 29

Inbound and Outbound Call Processing 29

NBX System Database 30

NBX System Dial Plan 30

Pretranslation 31
Routing 31
System Features Affected by the Dial Plan Configuration 32

Dial Plan Tables 34

Dial Plan Command Format 34
Internal Dial Plan Table 38
Incoming Dial Plan Table 38
Least Cost Routing Dial Plan Table 39
Adding New Dial Plan Tables 39

Dial Plan Pretranslators 40

Pretranslators for Incoming Calls 41
Pretranslators for Certain Outgoing Calls 42

Managing the Dial Plan Configuration File 43

Accessing the Dial Plan 44
Creating Dial Plan Configuration Files 44
Importing and Exporting Dial Plan Configuration Files 45
Importing a User-Defined Dial Plan 47
Exporting (Saving) a Dial Plan Configuration File 48
Testing a Dial Plan 49
Generating a Dial Plan Report 51

Modifying a Dial Plan Configuration File 53
Outdialing Prefix Settings 55
Managing Extensions 55

Extension Settings Overview 55

Changing Extension Length and Ranges 59

How Auto Discovery Assigns Extensions 60

Modifying Extensions 60
Managing Extension Lists 62

Adding an Extension List 64

Modifying an Extension List 67

Removing an Extension List 68
Managing Dial Plan Tables 68

Determining Which Devices Use Dial Plan Tables 69

Removing a Dial Plan Table 71
Managing Dial Plan Pretranslators 71

Identifying Devices Using Pretranslators 71

Identifying Devices Using Pretranslators for CLI 73

Removing a Pretranslator from the Dial Plan 74

Configuring the Dial Plan for the 4ESS Protocol (T1) 74
Overview of Voice Profile for Internet Mail 76
Configuring the Dial Plan for VPIM 76
Configuring VPIM Parameters Using the NBX NetSet Utility 79

VPIM Control Parameters 79
Operations Management 80
Statistics 82
Advanced Settings 84
Configuring Domain Name Server Information 87

Overview of Virtual Tie Lines 88

VTL Connections Using Unique Extension Ranges 88
VTL Connections Using Site Codes 90
Conference Calls 91

How to Configure a Virtual Tie Line 92

License Installation 92
Dial Plan Configuration 93
Updating the Extension List 96
Adding VTL Devices to the Pretranslators (Optional) 97
Verification of the Virtual Tie Line 97

Call Rerouting for Virtual Tie Lines 101

Example Dial Plan Entries 101

Managing Existing Virtual Tie Lines 103

Modifying a Virtual Tie Line Name 103
Viewing and Resetting Virtual Tie Line Statistics 105
Enabling Audio Compression 107
Enabling System-wide Silence Suppression 108

Using a VTL Password 109

How to Configure a VTL Password 109
Configuring VTL Passwords in the Dial Plan 110
Toll Calls Without a VTL Password 113
Music On Hold 113
Troubleshooting VTL Calls 114

Dial Plan Configuration File Commands 115

Dial Plan Command Summary 115
List of Dial Plan Commands 117

Sample Solutions Using Dial Plan Configuration File Commands 130

3 DEVICE CONFIGURATION

Adding, Removing, and Modifying Telephones 140

Adding a New Telephone 140

Modifying a Telephone 150

Checking a Telephone’s Status 151

Removing a Telephone 153

Rebooting a Telephone 154
Creating and Managing Bridged Extensions 154

Example Bridged Extensions Configurations 155

Defining Bridged Extensions 157

Defining Bridged Extensions on a Primary Telephone 157

Defining Bridged Extensions on a Secondary Telephone 158

Modifying Bridged Extensions 160

Sample Calling Situations Using Bridged Extensions 160

Viewing Bridged Extension Information 162
Creating and Managing Telephone Groups 162

Creating a New Telephone Group 163

Modifying a Telephone Group 164

Removing a Telephone Group 165

Viewing Telephone Group Membership 166
Recording and Monitoring Telephone Calls 167

Recording Calls Between Telephones with Different Recording Settings

167

Remote Telephones 168

Music On Hold 168

Non-NBX Telephones 168
Creating and Managing Button Mappings 169

Mapping Access Buttons 169

Mappings for Users and Groups 170

Creating a Busy Lamp/Speed Dial Button Mapping 170

Creating a Delayed Ringing Pattern 171

Creating Groups and Button Mappings 172
Changing Device IP Settings 181
Configuring Call Park 182

Adding a Call Park Extension 183

Changing the Name of a Call Park Extension 184

Removing a Call Park Extension 185

Configuring the NBX 1105 Attendant Console 186

Adding an Attendant Console 187
Modifying an Attendant Console 189
Viewing Attendant Console Status 190
Removing an Attendant Console 192
Configuring Attendant Console Buttons 192
Changing Attendant Console IP Settings 206

Configuring and Managing Analog Line Card Ports 207

Configuring a Line Card Port 207
Modifying a Line Card Port 214
Removing a Line Card Port 215
Verifying Line Card Port Status 216
Rebooting a Line Card Port 218
Advanced Settings 218

Connecting and Managing Analog Devices 222

Adding a 4-Port Analog Terminal Card 222
Adding a Single-Port Analog Terminal Adapter (ATA) 224
Modifying an Analog Terminal Port 227
Removing an Analog Terminal Adapter 230
Viewing The Status of an Analog Terminal Adapter 230
Advanced Settings 232

Configuring and Managing BRI-ST Digital Line Cards 239

Adding an ISDN BRI-ST Digital Line Card 240
Configuring the ISDN BRI-ST Digital Line Card 242
BRI-ST Card Status Lights 246
Modifying a BRI-ST Card 246
Adding or Modifying a BRI Group 248
Modifying BRI Card Channels 253
Modifying IP Settings for a BRI Card 256
Removing a BRI Digital Line Card 259

Configuring and Managing E1 Digital Line Cards 259

Adding an E1 Digital Line Card 260
Configuring the E1 Digital Line Card 262
E1 Card Status Lights 266
Modifying an E1 Card 266
Adding or Modifying an E1 Group 270
Modifying E1 Card Channels 276
Modifying IP Settings for an E1 Card 279
Removing an E1 Digital Line Card 282

Configuring and Managing T1 Digital Line Cards 282

Adding a T1 Digital Line Card 283

Configuring a T1 Digital Line Card for the DS1 Protocol 288

Configuring a T1 Digital Line Card for ISDN PRI Signaling 296

T1 Card Status Lights 302

Modifying a T1 Card 303

Support of AT&T’s 4ESS Switch Protocol 308

Modifying a T1 Group 311

Modifying T1 Card Channels 315

Modifying IP Settings for a T1 Card 319

Removing a T1 Digital Line Card 321

4 USER CONFIGURATION

Users 323

Phantom Mailboxes 323
Call Pickup 324

Group Numbers 324
Hunt Groups 325

Hunt Group Considerations 325

Linear and Circular Hunt Groups 325

Calling Groups 326

Call Coverage 326
Class of Service (CoS) 327

5 SYSTEM CONFIGURATION

System Settings 329

System-wide Settings 330

Regional Settings 334

Date and Time 335

Timers 336

Ringing Patterns 336

Multicast Addresses 337

IP Addresses 338

Maintenance Alerts 338
Speed Dials 339

Business Identity 339

Business Information 340
Business Hours 340

System Mode 340
Security 340
TAPI Settings 341
Disk Mirroring 341

Adding a Mirror Disk 343

Verifying a Failed Disk Drive 345

Reverting to a Single-Disk System 346

6 NBX MESSAGING

NBX Voice Mail 347

Voice Mail Extensions 349

Voice Mail Passwords 350

IMAP (for Integrated Voice Mail) 350

Off-Site Notification 351

Status 353

Port Usage 353

User Usage 357
Auto Attendant 358

Overview of Auto Attendant Features 358

Adding an Auto Attendant 359

Managing Auto Attendants 369

Voice Application Setup Utility 371

Testing the Auto Attendant 372
Voice Profile for Internet Mail 373

Control Parameters 373

Operations Management 374

Statistics 375

Advanced Settings 376

7 OPERATIONS

Software Upgrade 379
Reboot/Shutdown 380
Manage Data 380

Backup 381
Restore 381
Convert Database 381
Purge Database 381

Purge Database and CDR 381
Event Log 382
Licenses 382

Add a License 383

Remove a License 383

Usage Report 383

Backing Up Licenses 383

Restoring Backed Up Licenses 383

Obtaining Details of License History 384
Regional Software 384

Install 384

Remove 385

Details 385
Third-Party Drivers 386

NBX Software Upgrades 386

Third-Party Telephone Groups 386

8 REPORTS

Directory 387
Device List 388
System Data 388

Disk Status 388

Power Supply Status 388
Call Reporting 389

Windows Environment Specifications 389

Installing Call Reports 389

Configuring Call Reporting 390

Purge CDR 390

9 DOWNLOADS

Software 391

Additional Software 391
Label Makers 392
Quick Reference Sheets 392

10 TROUBLESHOOTING

Overview 393
Telephone Troubleshooting 394

Using the Telephone Local User Interface (LUI) Utility 394

Using H3PingIP 400
System-level Troubleshooting 401

Digital Line Card Troubleshooting 404

Alarm Conditions (Overview) 404

Alarm Descriptions 405

Alarms on NBX Digital Line Cards 406

Configuration and Status Reports 407
Connecting a Computer to a Serial Port 410
Servicing the Network Call Processor Battery 411
Getting Service and Support 411

A CONNEXTIONS H.323 GATEWAY

Overview of ConneXtions 414
Installation Requirements 414

WAN Router 414

Windows-based System 415

ConneXtions Software 418
Preparing for Installation 418

Assembling System Information 418

Verifying the G.723 Converter 419

Checking Service Pack (Windows NT Only) 419

Configuring Licenses 419
Installing ConneXtions 421

Finishing the Installation 423

Overview of H.323 424

Negotiated Connections 424
Negotiated Voice Compression 425
Standard Extensions 426

Remote Internet Device Connections 426
The H.323 Connection 427
Connection Considerations 428

Overall Connectivity 428

Quality of Service 429

Quality of Service Control 431
Special Issues 434

Firewall Security 434

Gateway Load 436

Remote Access 436

PBX Connections 437

Class of Service 440

IP Type of Service and Differentiated Services 440

Alternate Gatekeepers 441
Checking Connections 441

Gateway Checks 441

Network Checks 442
Placing Calls 446

IP Address Entry 446

Speed Dials 447

One Button Access 449

Entering Digits During Calls 449
Receiving Calls 450

Auto Attendant 450

Attendant Console 451

Other Extensions 451
Handling Conference Calls 452
Related H.323 Documentation 452

B ISDN COMPLETION CAUSE CODES

C CONFIGURING OPTION 184 ON A WINDOWS 2000 DHCP

S

ERVER

Overview 459

Assumptions 459

Configuring Option 184 459

Creating Option 184 459
Editing Option 184 Values 460
Activating Option 184 461

GLOSSARY

INDEX

FCC CLASS A VERIFICATION STATEMENT

INDUSTRY CANADA NOTICE

3COM END-USER SOFTWARE LICENSE AGREEMENT TERMS AND
C

ONDITIONS AND LIMITED WARRANTY

ABOUT THIS GUIDE

How to Use
This Guide

This guide provides information and instructions for configuring and

®

managing the 3Com

SuperStack® 3 NBX® Networked Telephony

Solution and the 3Com NBX 100 Communications System. For
information about installing either system for the first time, see the NBX

Installation Guide.

If the information in the release notes differs from the information in this
guide, follow the instructions in the release notes. Release notes are
available on the NBX Resource Pack CD.

Ta bl e 1 helps you to find information in this guide.

Tab le 1 Overview of This Guide

If you are looking for Turn to

An overview of the NBX systems Chapter 1
How to prepare and configure the dial plan Chapter 2
How to configure devices Chapter 3
How to configure user settings Chapter 4
How to configure system settings Chapter 5
How to configure NBX Voice Messaging (voice mail), the Auto

Attendant, and Voice Profile for Internet Mail (VPIM)
Basic operations information Chapter 7
How to create reports Chapter 8
How to download software and label makers Chapter 9
Troubleshooting information Chapter 10
How to configure 3Com ConneXtions software Appendix A
Information about ISDN Completion Cause Codes Appendix B
How to configure Option 184 on a Windows 2000 DHCP server Appendix C
Definitions of telephony and networking terms Glossary
References to all topics in this book Index
FCC and Industry Canada information, Software End-User LIcense

Agreement, and Limited Warranty for Software and Hardware

Chapter 6

the last pages of
the book

16 ABOUT THIS GUIDE

Conventions Ta bl e 2 lists conventions that are used throughout this guide.

Tab le 2 Notice Icons

Icon Notice Type Description

International Terminology

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.

Ta bl e 3 lists the United States and international equivalents of some of
the specialized terms that are used in the NBX documentation.

Tab le 3 International Terminology

Term in U.S. English Term Outside the United States

Toll restrictions Call barring
Pound key (#) Hash key (#)
CO (central office) Telephone Exchange
Toll-free Free-phone
Analog Line Card Analog Trunk Line Interface Module

Documentation The documentation for the NBX systems is designed to help NBX

installers, administrators, and telephone users learn, use, and maintain
their NBX systems and telephones.

Your Comments Your suggestions are important to us. They help us to make the NBX

documentation more useful to you.

Please send your e-mail comments about this guide or any of the 3Com
NBX documentation and Help systems to:

[e-mail]

Documentation 17

Please include the following information with your comments:

■ Document title

■ Document part number (found on the front or back page)

■ Page number

Example:

NBX Administrator’s Guide

Part Number 900-0093-01
Page 25

As always, please address all questions regarding the NBX hardware and
software to your authorized 3Com NBX Voice Authorized Partner.

18 ABOUT THIS GUIDE

1

INTRODUCTION

Network-based Telephony

The NBX Administrator’s Guide provides information and instructions for
configuring your NBX

■ Network-based Telephony

■ Overview of the System Software

■ NBX NetSet Administration Utility

■ NBX NetSet Features

For information about installing the hardware components, see the

NBX Installation Guide.

3Com Networked Telephony Solutions merge telephony with networking
by delivering business telephone service over a data network.

To the telephone user, the NBX Business Telephone or NBX Basic
Telephone is a typical office telephone. You can use it to make and
receive calls, transfer calls, park calls, use voice mail, and so on. You can
also dial speed dial numbers from either telephone model. Inside the NBX
Telephone is an Ethernet device that can communicate over the LAN
using Ethernet frames or, optionally, IP packets (with the optional
upgrade). The telephone also serves as an Ethernet switch or hub
(depending on the model of telephone) for your computer. You can
connect your computer network interface card (NIC) to your network
(LAN) through the telephone and avoid the need for a second LAN
connection at the desktop.

®

system. This chapter covers these topics:

The core of 3Com Networked Telephony Solutions is the Call Processor.
The Call Processor manages the processes of making and receiving calls,
providing voice mail and auto attendant services, and responding to
requests for special services, such as access to the NBX NetSet
administration utility, Computer Telephony Integration (CTI) services, or
the system’s IMAP (Internet Message Access Protocol) server.

20 CHAPTER 1: INTRODUCTION

The NBX system provides the reliability required in a business environment
because NBX system voice traffic is independent of computer traffic on
the same network. In fact, after the Call Processor completes the
processing required to connect two telephones, the telephones
communicate directly with each other. Therefore, existing conversations
are not affected if power to the Call Processor fails or if the network
operating system crashes or hangs.

Overview of the

This section describes the major features of the NBX system.

System Software

Auto Attendant With the Auto Attendant, a full-featured call answering service, you set

up automated call answering, including multiple Auto Attendants, each
with separate menu structures, to manage incoming calls.

Auto Discovery and

Auto Relocation

Virtual Tie Lines You can connect two or more NBX systems that are connected to your

Integrated Voice Mail

and Messaging

Features

The Call Processor and the NBX Telephones communicate with each other
to streamline configuration. When you connect a new telephone, the
system discovers it and adds it to the configuration database. The
communication between devices means that if telephone users move
their telephones to a new location, the telephones retain their extension
number and personal settings. You do not have to change telephone
addresses and data for them.

Wide Area Network. Calls made over Virtual Tie Lines incur no toll
charges.

NBX Voice Messaging is a standard feature of the 3Com Networked
Telephony Solution. Voice Messaging supports Off-Site Notification,
which alerts you if you receive new voice messages when you are out of
the office. Voice Messaging also includes an IMAP (Internet Message
Access Protocol) mail server that allows you to retrieve voice mail
messages through any IMAP4-compatible e-mail client.

Standard NBX

Telephone Features

NBX systems support the standard features, such as call park, conference,
speed dial, and paging, that you expect in a business telephone system.

Overview of the System Software 21

Redialing From

Call Logs

In the NBX Business Telephone and NBX Basic Telephone display panels,
you can view logs of recent Missed Calls, Answered Calls, and Dialed
Calls. You can select and redial a call from any of these lists, as well as
from the directory of internal users, your personal speed dial list, or the
system-wide speed dial list.

Calling Line Identity

Restriction (CLIR)

When an NBX Telephone user makes a call on an ISDN channel, the
receiving party can see the identity of the caller (normal ISDN behavior).
When the NBX option Calling Line Identity Restriction (CLIR) is enabled,
the receiving party cannot see your identity when you call.

Computer Telephony

Integration (CTI)

Connectivity

3Com Networked Telephony Solutions provide a software-based CTI
solution through the Microsoft Telephony Applications Programming
Interface (TAPI). Your telephone and your computer connect to the same
LAN so that your computer does not need any special hardware, such as
proprietary cards. The NBX system works with TAPI 2.X-compliant CTI
applications.

Call Recording You can integrate a third-party call recording system into your NBX

system so that selected calls can be recorded. (Optional license required.)

NBX Call Reports NBX Call Reports, a Windows client program, is a standard feature of

3Com Networked Telephony Solutions. Call Reports allows you to save
calling data about inbound and outbound calls, present it in a report, or
export it to spreadsheets, word processors, or reporting programs.

NBX Resource

Pack CD

Support for Multiple

Languages

3Com Networked Telephony Solutions include the NBX Resource Pack CD
with the most recent system software for backup and upgrade purposes,
optional Microsoft Windows software from 3Com and third-party
vendors, and electronic versions of system documentation.

The NBX system’s Administrator Help is in English, by default, but the
User side of the NetSet administration utility’s Help system can be
configured for several other languages. In addition, the three telephone
Quick Reference Cards, the NBX Telephone Guide, and the voice prompts
are available in multiple languages on the NBX Resource Pack CD.

22 CHAPTER 1: INTRODUCTION

NBX NetSet Administration Utility

The NBX NetSet Administration utility is an HTML-based web interface in
which you configure and manage the NBX system. You need a web
browser, such as Microsoft Internet Explorer, to administer the system.
Internet Explorer version 5.5 is optimal. (You do not need Internet access.)

Figure 1
when you log on to the NBX NetSet utility.

Figure 1 NBX NetSet - Main Menu Window

shows the NBX NetSet - Main Menu window, which appears

NBX systems present the NBX NetSet utility through an embedded web
server. NBX NetSet passwords grant system administrators and users
different levels of access privileges.

Individual telephone users can view or change their personal settings
such as personal speed dial lists, off-site notification settings, and ringing
tones.

System administrators can manage user profiles and devices, change
system parameters, such as speed dial lists and dial plan settings, and
upgrade the system software.

NBX NetSet Features 23

NBX NetSet Features

Ta bl e 4 describes the features that administrators can access through the
NBX NetSet - Main Menu window.

Tab le 4 NBX NetSet Features for the NBX Administrator

Icon Description

Configure and manage system-wide NBX Voice Messaging, Auto
Attendants, and VPIM settings. If you install a license for a third-party
messaging application and disable NBX Messaging, this icon is not
available.

Configure and manage NBX devices, such as:

■ Telephones and telephone groups

■ Analog Line Cards

■ Digital Line Cards (T1, E1, and BRI-ST cards)

■ Analog Terminal Adapters (ATAs)

■ Call Park

■ Attendant Consoles

■ Virtual Tie Lines

Configure and manage your system Dial Plan.

Download, install, configure, and manage additional system features,
such as:

■ Optional NBX software, such as NBX Call Reports and TAPI software

■ Multiple LabelMakers for NBX Telephones and Attendant Console

■ Quick Reference Guides for the NBX Business and Basic Telephones,

and analog telephones on the NBX system

Configure and manage these system-level operations:

■ Upgrading software

■ Rebooting and shutting down the NBX system

■ Managing data (database backup and restore)

■ Viewing and managing event log files

■ Viewing and adding licenses for optional software

■ Setting regionally different information (voice-prompt language, dial

tones and cadences, and documentation language)

■ Installing third-party drivers (for example, for telephones other than

NBX Telephones)

24 CHAPTER 1: INTRODUCTION

Tab le 4 NBX NetSet Features (continued)for the NBX Administrator

Icon Description

View and manage system reports:

■ Directory lists of users

■ Device List

■ System Data

■ Call Reporting

Configure and manage the system-level settings for:

■ System Settings

■ System-wide Speed Dials

■ Business Identity

■ Security

■ TAPI Settings

Configure settings for TAPI (Telephony Applications Programming
Interface). (Can also be configured from the System Configuration icon.)

Configure and manage:

■ Users

■ Call Pickup Groups

■ Hunt Groups

■ Class of Service (CoS) Settings for users

NBX NetSet Features 25

Ta bl e 5 describes the additional icons that appear on or below the NBX
NetSet - Main Menu window. They are shortcuts to specific areas within
the NBX NetSet utility and to some of the online documentation.

Tab le 5 NBX NetSet Shortcuts

Icon Description

The Help icon in the NBX NetSet - Main Menu window provides access
to the Contents, Index, and search features of the online Help system.
The Help icon on individual dialog boxes takes you directly to
content-specific Help in addition to accessing the global Help features.

Displays Tab To It, a window that shows all the tabs for the entire
system. Click on a tab in the Tab to It window to go directly to that tab’s
interface. The Tab to It icon also appears on most dialog boxes
throughout the NBX NetSet utility.

If you install a license for NBX Unified Communications or a third-party
messaging application, the tab for NBX Messaging is disabled in the
Tab to It window

Opens the online (PDF) version of the NBX Administrator’s Guide (this
book). This icon is available in the NBX NetSet - Main Menu window
only.

Opens the online (PDF) version of the NBX Telephone Guide. This icon is
available in the NBX NetSet - Main Menu window, and below the User
Settings window when users log on to the NBX system.

Opens the online (PDF) version of the NBX Feature Codes Guide. This
icon is available in the NBX NetSet - Main Menu window, and in the
User Settings window when users log on to the NBX system.

Quickly returns you to the NBX NetSet - Main Menu window.

26 CHAPTER 1: INTRODUCTION

2

DIAL PLAN

The NBX system’s dial plan determines how the system handles calls. It defines the set of destinations that the system can reach, how to get to these destinations, and which telephone numbers to dial to reach these destinations. This chapter provides information about understanding, developing, and managing the dial plan. It covers these topics:

■ Dial Plan Concepts and Overview

■ Dial Plan Tables

■ Dial Plan Pretranslators

■ Managing the Dial Plan Configuration File

■ Outdialing Prefix Settings

■ Managing Extensions

■ Managing Extension Lists

■ Managing Dial Plan Tables

■ Managing Dial Plan Pretranslators

■ Configuring the Dial Plan for the 4ESS Protocol (T1)

■ Overview of Voice Profile for Internet Mail

■ Configuring the Dial Plan for VPIM

■ Configuring VPIM Parameters Using the NBX NetSet Utility

■ Overview of Virtual Tie Lines

■ How to Configure a Virtual Tie Line

■ Call Rerouting for Virtual Tie Lines

■ Managing Existing Virtual Tie Lines

■ Using a VTL Password

■ Dial Plan Configuration File Commands

■ Sample Solutions Using Dial Plan Configuration File Commands

28 CHAPTER 2: DIAL PLAN

Dial Plan Concepts and Overview

The dial plan configuration file is an ASCII text file that implements the
dial plan and specifies pretranslation (digit manipulation). The system is
shipped with several default dial plan configuration files, typically, a
3-digit and a 4-digit file for each supported country.

The dial plan configuration file includes several tables:

■ Internal — Must be table ID 1

■ Incoming — Must be table ID 2

■ Least Cost Routing — Must be table ID 3

■ Routes

■ Pretranslators

You can create additional tables if necessary.

Each dial plan table consists of a series of entries, each of which includes
a sequence of digits and the action to be performed by the NBX system in
response to sending or receiving those digits. For more information on
the Internal, Incoming, and Least Cost Routing dial plan tables, see “Dial
Plan Tables” later in this chapter.

Usually, you access the dial plan configuration file and manage dial plan
operations, tables, pretranslators, and extension lists through the NBX
NetSet administration utility. If your dial plan is larger than 32,000
characters, however, you cannot edit the dial plan using the NBX NetSet
utility. You must export the dial plan, edit it, and then import it.

Before you configure the dial plan, please be sure that you understand
these concepts:

■ Call Process Flow

■ Inbound and Outbound Call Processing

■ NBX System Database

■ NBX System Dial Plan

■ Pretranslation

■ Routing

In addition, be sure to understand how the dial plan configuration file
can affect other parts of the NBX system. See “System Features Affected
by the Dial Plan Configuration” later in this chapter.

Dial Plan Concepts and Overview 29

Call Process Flow The dial plan configuration file is a key component of inbound and

outbound call processing. The dial plan tables in the configuration file
process incoming calls in this order:

1 Incoming Dial Plan Table
2 Pretranslator Table

The dial plan tables process outgoing calls in this order:

1 Internal Dial Plan Table
2 Least Cost Routing Table

After pretranslation (if performed), the final translation process routes the
call to the destination.

Inbound and

Outbound Call

Processing

The system routes all inbound and outbound calls through the dial plan.

Inbound Call Processing

The system processes inbound calls using the Incoming table. The system
can also use pretranslators to perform digit manipulations on incoming
calls before it uses the Incoming table.

Each pretranslator operation performs a digit manipulation operation on
the dialed digits. For incoming calls, if the DID/DDI range matches the
internal extensions, the dial plan requires no pretranslator. However, you
can use pretranslators to map nonmatching dialed numbers on an
incoming DID/DDI channel to desired internal extensions. See the
example in Customer Requirement 1 in “Sample Solutions Using Dial Plan
Configuration File Commands” later in this chapter.

Outbound Call Processing

The system processes outbound calls using the Internal dial plan table or
the Least Cost Routing table.

You can add entries to the Internal dial plan table to match the system to
your service. See Customer Requirement 2 in “Sample Solutions Using
Dial Plan Configuration File Commands” later in this chapter.

If you have entries in both the Least Cost table and the Internal table for
the same purpose, the behavior of the dial plan can be confusing. 3Com
recommends that you accomplish least cost routing using Internal Table
entries. For more information, see TimedRoute Create

, TimedRouteEntry

Create, and TimedRouteOperation Create later in this chapter.

30 CHAPTER 2: DIAL PLAN

NBX System Database The NBX system database contains a default dial plan that is initially

loaded at the factory and is reloaded if you purge the database. The
default dial plan for the SuperStack 3 NBX system is a 4-digit plan; for the
NBX 100, it is a 3-digit plan.

Changes that you make to any system settings, including changes made
by importing a modified dial plan configuration file, are reflected in the
database. When you reboot the system, it loads the database with any
changes that you have made.

The NBX system database includes all of the settings necessary for system
operation:

■ IP and MAC addresses for the Network Call Processor, telephones, and

line cards

■ Auto Attendant definitions and menus

■ Dial plan configuration file information

■ Voice mail settings and messages

■ Telephone extensions

■ Hardware configuration information

■ Button mappings for the NBX Telephones

■ Call group definitions

■ Software license information

■ User profiles

NBX System Dial Plan You can import a dial plan configuration file to provide the system with a

set of operating instructions for managing the telephone system.
Alternatively, if you have made changes to the currently loaded
instructions through the NBX NetSet utility, you can export the dial plan
configuration file to save it. You can also make changes by editing the
configuration file off-system, using any ASCII editor, and then importing
the modified file. You can quickly and easily reuse a given configuration
file on many systems. For more information, see “Importing and
Exporting Dial Plan Configuration Files” later in this chapter.

The system is shipped with several default dial plan configuration files,
typically, a 3-digit and a 4-digit file for each country that is supported.
In addition, the file

samples.txt contains several examples that illustrate

how you can configure the dial plan configuration file to control how the
system manages incoming and outgoing calls.