Cisco Systems OL-14619-01 manual Unified Messaging with Customer-Provided Infrastructure

Chapter 4 Designing a Cisco Unity System with Exchange as the Message Store

Deployment Models

Unified Messaging with Customer-Provided Infrastructure

Revised May 6, 2008

For the Cisco Unity Unified Messaging configurations, Cisco Unity installs into an existing infrastructure, is a part of the messaging environment, services subscribers who are homed on existing Exchange e-mail servers, and uses existing DC/GCs. This reduces administrative overhead when compared with maintaining a Cisco Unity Voice Messaging solution or maintaining a legacy voice messaging system. With Unified Messaging, only one messaging infrastructure is required to support both e-mail and voice messaging. The customer is responsible for maintaining the DC/GCs, Exchange servers, and DNS.

Each Cisco Unity server can be connected to a circuit-switched phone system, to Cisco Unified Communications Manager, or to both. If the phone system has ports available, you can connect more than one Cisco Unity server to each phone system.

When you are setting up two or more Cisco Unity servers in the same Active Directory forest, the Cisco Unity servers can be networked by using Cisco Unity Digital Networking.

Mixed Unified Messaging and Voice Messaging with Customer-Provided Infrastructure

When mixing Unified Messaging and Voice Messaging deployment models, the Unified Messaging portion of the deployment is the same as a Unified Messaging deployment without the Voice Messaging subscribers.

The Voice Messaging subscribers require separate accounts and mailboxes:

•Each Voice Messaging subscriber requires a separate Active Directory user account in the existing forest.

•Each Voice Messaging subscriber requires a separate Exchange mailbox that holds only Cisco Unity voice messages. The mailbox can be stored on existing Exchange servers or can be stored on separate, dedicated Exchange servers that home only Cisco Unity voice messages. If the mailboxes are stored on existing Exchange servers, the customer is responsible for support for the servers. If the mailboxes are stored on Exchange servers that are dedicated to Cisco Unity voice messages, Cisco will support the Exchange servers.

If the Voice Messaging subscribers are homed on one or more dedicated Exchange servers on which the Voice Mail Run-time Edition of Microsoft Exchange was installed, those subscribers do not need Microsoft Client Access Licenses (CALs). Unified Messaging subscribers all need CALs.

For more information on the Unified Messaging portion of a mixed system, see the “Unified Messaging with Customer-Provided Infrastructure” section on page 4-2.

For more information on the Voice Messaging portion of a mixed system, see the “Voice Messaging with Customer-Provided Infrastructure” section on page 4-3.

Voice Messaging with Cisco-Provided, Dedicated Infrastructure

Revised May 6, 2008

In this deployment model:

•Each Voice Messaging subscriber requires a separate Active Directory user account in a dedicated forest.

Design Guide for Cisco Unity Release 5.x

4-2 OL-14619-01