Lucent Technologies Octel Unified Messenger Technical manual

101-1620-005
Octel Unified Messenger
Concepts and Planning Guide

Your comments on this document are welcome.
They can assist us in improving our products.
Please address comments to:
Unified Messenger Documentation Team
Lucent Technologies, Octel Messaging Division
1001 Murphy Ranch Road
Milpitas, CA 95035-7912
USA
[phone]
http://www.octel.com/um
E-mail: unified.messeng[email protected]
This software is the property of Lucent Technologies Octel Messaging Division, formerly Octel Communications
Corporation, and may not be used without a valid written license agreement. This software is protected by the
copyright laws of the United States, international copyright treaties, and all other applicable national laws. The
right to copy this document is granted to authorized resellers and customers for their use and the use of their
customers, as specified in their agreements with Octel Communications Corporation, a subsidiary of Lucent
Technologies. Any unauthorized use, reproduction (except for legally permissible archival copies), distribution
or transfer of this software, or preparation of derivative works is strictly prohibited.
Copyright 1996-1999 Octel Communications Corporation, a subsidiary of Lucent Technologies. All rights
reserved.
All trademarks identified by the TM or ® symbol are trademarks or registered trademarks, respectively, of Octel
Communications Corporation, a subsidiary of Lucent Technologies. All other trademarks belong to their
respective owners. Printed in the USA.
U.S. Government Restricted Rights Notice
This software is provided with RESTRICTED RIGHTS. Use, duplication, or disclosure by the Government is
subject to restrictions as set forth in subparagraphs (c)(1) and (2) of the Commercial Computer Software -
Restricted Rights clause at FAR Section §52.227-19, in the applicable software license agreement pursuant to
DFARS §227.7202-3(a) (1995), or in (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at
DFARS Section §252.227-7013 (OCT 1988), as applicable. Unpublished rights reserved under the copyright
laws of the United States. Contractor/Manufacturer is Octel Communications Corporation, a subsidiary of
Lucent Technologies, 1001 Murphy Ranch Road, Milpitas, CA 95035-7912, USA.

101-1620-005 iii
Preface
Overview
This guide provides:
nGuidelines for planning and sizing a new installation.
nA description of the hardware and software components of Octel
Unified Messenger.
nThe concepts underlying Octel Unified Messenger, including
voice mail domains, addressing, client and server operations, and
telephony concepts.
Audience
This guide is intended for use by anyone recommending, purchasing, or
installing Octel Unified Messenger. Readers should be familiar with the
concepts and operation of Windows NT and Microsoft Exchange.

Octel Unified Messenger Concepts & Planning Guide
iv 101-1620-005
Octel Unified Messenger documentation
See the following documentation for more information about Octel
Unified Messenger:
Installation Guide, 101-1621-005
Provides information on the installation process.
Available on the Octel Unified Messenger CD-ROM.
Administrator’s Guide, 101-1618-005
Provides information on administering the Octel Unified Messenger
system.
Available on the Octel Unified Messenger CD-ROM.
Subscriber’s Reference Guide, 101-1619-005
Provides information on using Octel Unified Messenger client
applications.
Available on the Octel Unified Messenger CD-ROM.
Unified Messenger At-A-Glance, 101-1622-004
Provides at-a-glance information on using Octel Unified Messenger from
the telephone user interface.
Configuration Notes
Provides integration information for types of PBX and fax devices.
Available from your Octel Unified Messenger support representative.
Rhetorex User’s Guide for AccuCall+ for Windows 95 and Windows NT,
Revision 1.0, 201-0048-000
Provides information on configuring the voice board driver software to
communicate with a PBX.
Available on the Octel Unified Messenger CD-ROM.
Rhetorex Hardware and Software Installation Guide for Windows 95 and
Windows NT, 201-0050-000
Provides information on installing a Rhetorex Voice Processing board,
and on installing and configuring Rhetorex driver software and firmware.
Available on the Octel Unified Messenger CD-ROM.

Preface
101-1620-005 v
Unified Messenger Online Support
For Octel Unified Messenger support, contact your Octel Unified
Messenger support representative.
For important, up-to-date information on Octel Unified Messenger, see
the Readme file available on the Octel Unified Messenger CD-ROM.
Conventions
The following conventions are used in this guide:
Convention Description
ALL
CAPITALS Filenames and extensions, directory names, paths, and acronyms.
Initial Capitals Names of applications, programs, menu items, and
dialog boxes.
italic type Book titles.

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Contents
vii101-1620-005
Chapter 1 Introducing Octel Unified Messenger
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Product features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
The unified mailbox. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Telephone user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
PC user interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Networked components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Microsoft Exchange Server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Voice server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Tracing server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Fax server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
PBX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
TUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
PC user interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Benefits summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Subscriber convenience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Ease of administration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Send messages near and far . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Chapter 2 Sizing the system
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Design rules for voice mail domains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Sizing ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Calculating the number of voice servers required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9

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viii 101-1620-005
Hardware and software requirements for Octel Unified Messenger servers . . . . . . . . . . . . . . . 2-10
Evaluating the additional load on Microsoft Exchange servers. . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Evaluating the additional network traffic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Using Octel Unified Messenger via slow network connections. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Using multimedia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
ConfigurationUsing the telephone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
The effect of slow network connections on Octel Unified Messenger applications . . . . . . 2-19
Octel Unified Messenger interoperability with third-party fax servers . . . . . . . . . . . . . . . . . . . 2-20
Requirements for third-party fax server interoperability with Octel Unified Messenger . . 2-21
Enabling Octel Unified Messenger subscribers for fax. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Routing inbound fax calls to the third-party fax server. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Chapter 3 System architecture
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Voice mail domain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Addressing messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
System components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Client components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Server components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
PBX integration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Audio encoding formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Chapter 4 Designing addressing schemes
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Local mailbox numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Dial-by-Name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Numeric addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Chapter 5 Providing interoperability with existing Octel servers
Introduction to OctelNet™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
OctelNet Messaging Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Designing an OctelNet addressing scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Prefix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Additional digits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Mailbox length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
OctelNet addressing scheme design rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Addressing OctelNet messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Addressing OctelNet messages from Octel Unified Messenger . . . . . . . . . . . . . . . . . . . . . . 5-7

Contents
ix101-1620-005
Addressing OctelNet messages to Octel Unified Messenger recipients. . . . . . . . . . . . . . . . .5-7
Providing single-site interoperability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
Automatic mailbox forwarding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
Chapter 6 Connecting with the PBX
and establishing security rules
Connecting with the PBX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Establishing security rules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Access to voice mail domain administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Access to subscriber accounts administration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Access to subscriber mailboxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Appendix A Appendix A - Sizing for ports
Calculating the number of supported subscribers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Appendix B Appendix B - Grade of service
Calculating busy hour traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GL-1
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IN-1

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PART 1
CONCEPTS

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101-1620-005 1-11-1
1
Introducing Octel Unified Messenger
This chapter introduces Octel Unified Messenger and discusses the
following topics:
nOctel Unified Messenger product features.
nThe “unified mailbox” concept.
nNetworked components of the Octel Unified Messenger
environment.
nBenefits of using Octel Unified Messenger.

Octel Unified Messenger Concepts & Planning Guide
1-2 101-1620-005
Introduction
Today e-mail, voice mail, and fax are established as strategic, enabling
technologies at companies large and small. As a result, people are
receiving both a larger volume and more types of messages than ever
before.
However, each kind of message typically requires its own access medium
(telephone, personal computer, or fax device) and support structure
(capital equipment, management tools, and service procedures). The task
of retrieving, prioritizing, and storing messages can be inconvenient,
complex, and time-consuming, even though messaging should enhance
and streamline the communications process.
To make this task easier, Octel Unified Messenger provides the following
features:
nMessaging convenience
Octel Unified Messenger enables everyone to view, listen to,
send, store, and retrieve all their messages from one mailbox (the
“unified mailbox”) with whatever access tool is the most
convenient at any particular time: telephone, desktop computer,
portable computer, or fax device.
nSimplified messaging management
With Octel Unified Messenger, organizations can simplify
communications administration, maintain accurate messaging
directories, and reduce communication costs.
nInteroperability
Utilizing OctelNet, Octel Unified Messenger systems
interoperate with other Lucent Technologies Octel Messaging
Division (OMD) voice messaging systems. This means that
subscribers can exchange voice messages with users on other
Octel messaging servers that support OctelNet.

Introducing Octel Unified Messenger
101-1620-005 1-3
Product features
OMD uses the next-generation client/server messaging system Microsoft
Exchange Server to deliver a truly unified messaging architecture that
meets the mission-critical demands of even the largest organization.
Specific features of Octel Unified Messenger include:
nA single unified view of messages using the Exchange Server
mailbox.
nTelephone access to the Exchange Server mailbox.
nFax, voice, and e-mail management using personal folders in
Microsoft Exchange or Microsoft Outlook.
nA single data store for all messages in the Microsoft Exchange
Server.
nA common, enterprise-wide directory for all messages.
nA single point of administration through enhanced Microsoft
Exchange Server administration.
nText-to-speech (TTS) delivery of e-mail and fax subject headers
or the entire body of text messages.
nFax delivery of e-mail messages (including attachments) using
third-party fax servers.
nVoice message playback through multimedia equipment or a
telephone.
nVoice messages addressed using the Microsoft Exchange
directory.
nAbility to send, forward, or reply by voice across a local area
network (LAN), a wide area network (WAN), or the Internet.
nVoice object embedding in OLE 2.0 and ActiveX compliant
documents.

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1-4 101-1620-005
The unified mailbox
For each Octel Unified Messenger subscriber, all voice mail, telephone
answering, e-mail, fax, and data messages (including documents and
forms) are stored in the unified mailbox. Messages can be viewed,
listened to, stored, or retrieved using either telephone, PC, or fax.
Figure 1-1 shows the concept of the unified mailbox.
1PC
2 Telephone
3Fax
Figure 1-1. Unified mailbox
21 3

Introducing Octel Unified Messenger
101-1620-005 1-5
Telephone user interface
Subscribers can access their unified mailbox from a telephone user
interface to do the following:
nSend and receive voice messages.
nPlay back voice messages.
nListen to e-mail messages, using TTS conversion.
nForward fax messages to other recipients or to a fax device for
printing.
nStore, delete, reply to, or forward e-mail, voice, or fax messages.
nPrint e-mail messages on a fax device.
PC user interface
Subscribers can access their unified mailbox from a PC to do the
following:
nSend and receive voice messages.
nPlay back voice messages through the telephone or through PC
multimedia equipment.
nSend and receive e-mail messages.
nSend and receive fax messages.
nStore, delete, reply to, or forward e-mail, voice, or fax messages.

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1-6 101-1620-005
Networked components
Figure 1-2 shows the networked components of the Octel Unified
Messenger environment.
1PBX
2 Telephone user interface
3 Fax (optional)
4 Octel voice server
5 Fax server (optional)
6 PC user interface
7LAN
8 Octel tracing server
9 Microsoft Exchange server
Microsoft Exchange Server
The Microsoft Exchange server is a Windows NT-based system that
contains all user mailboxes and all directory information. It
communicates with other Exchange servers on the LAN, with Exchange
servers on remote sites via WAN or network dial-up, and through
gateways with other e-mail systems across the Internet. The Exchange
server provides a single point of administration for subscriber mailboxes.
Figure 1-2. Octel Unified Messenger networked components
1
23
4
5
6
7
8
9

Introducing Octel Unified Messenger
101-1620-005 1-7
Voice server
The voice server is a Windows NT-based system that is the integral link
between the LAN and the telephone network. It performs the following
functions:
nAnswers PBX-forwarded telephone calls.
nPlays personalized greetings.
nRecords messages.
nSends compressed message files to subscriber mailboxes for
storage.
nRetrieves stored messages for playback through the telephone or
through multimedia.
nProvides the capability for TTS conversion of e-mail messages.
nDetects incoming faxes and forwards them to third-party fax
servers.
Multilingual
text-to-speech The voice server includes a speech synthesis device that allows subscribers to hear their e-mail messages over the telephone. This feature
is also used for name confirmation when a recorded name is not available.
Organizations that receive e-mail in more than one language can enable a
multilingual TTS. This identifies the language of the e-mail message and
reads the message in that language.
The following languages are available:
nEnglish
nFrench
nGerman
nSpanish
nDutch
nItalian
nRussian
Tracing server
The tracing server is a separate system that records operational
information about activity in the voice mail domain. Events, for example,
port activity, are stored in an operation history database. An administrator

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1-8 101-1620-005
can generate reports summarizing voice mail activity using the Octel
Unified Messenger Reporting Tool application.
Fax server
The fax server is a third-party component to which the voice server
delegates all functionality related to sending and receiving faxes. For
more information on third-party fax server compatibility with Octel
Unified Messenger, see “Octel Unified Messenger interoperability with
third-party fax servers” on page 2-20.
Octel Unified Messenger, in conjunction with a compatible fax server,
offers the following fax features:
nFax messages can be received and stored in a subscriber’s
mailbox.
nSubscribers can send fax messages and e-mail messages to fax
devices for printing.
nA copy of a subscriber’s Inbox listing can be faxed to a fax device
through the telephone user interface.
For more information on how to set up fax servers, see “Octel Unified
Messenger interoperability with third-party fax servers” on page 2-20.
Incoming faxes Incoming faxes may be received in two ways, depending on whether the
system is set up with Direct Inward Dialing (DID):
nOn systems with DID, callers call into a subscriber’s mailbox and
press Start on their fax device.
nOn systems without DID, callers call the subscriber’s automated
attendant from the fax machine’s telephone, select the
subscriber’s extensions by using either Dial-by-Name or by
entering the subscriber’s extension number, and press Start on
their fax device.
Once fax calls are received, Octel Unified Messenger transfers the call
from the voice server to the fax server. When the fax server answers the
call, the voice server identifies the intended recipient and switches the call
to the fax server to receive the fax. The fax server then delivers the fax
message into the recipient’s mailbox.