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Networking Guide for Cisco Unity Release 5.x (With Microsoft Exchange)
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Chapter 2 Digital Networking
Overview: Digital Networking
Note that Cisco Unity servers that are licensed for Unified Messaging (UM) and Cisco Unity servers that
are licensed for Voice Messaging (VM) can use Digital Networking to exchange messages. There are no
licensing issues associated with VM and UM existing in the same Exchange organization or Active
Directory forest, as long as the VM subscribers access voice and fax messages only over the phone
interface or with the separately licensed Cisco Personal Communications Assistant (PCA).
For specific information about requirements and support, see the Cisco Unity Networking Options
Requirements document, available at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_installation_guides_list.html.
Licenses and License Pooling
Digital Networking is enabled on every Cisco Unity server. There are no additional licenses that you
need to obtain to set up Digital Networking.
Though you do not need a license for Digital Networking, you may want to add a licensed feature called
license pooling. License pooling allows Cisco Unity servers that are set up for Digital Networking to
pool licenses for subscribers and for the Cisco Unity Inbox. With license pooling, if total utilization
across all of the Cisco Unity servers does not exceed total licenses for the feature, the Cisco Unity server
is in compliance with licensing restrictions. For example: two Cisco Unity servers each have 500
licenses for subscribers; with license pooling, one of the servers can use 501 or more licenses as long as
the total used by both servers does not exceed 1,000.
For all licensed features other than subscriber licenses, licensing is on a per-machine basis. Licensing
information is stored with the primary location for each Cisco Unity server. Because location data is
stored in the directory, each Cisco Unity server has the information that it needs to keep track of license
usage in the pool.
For more information about license pooling and obtaining licenses for Cisco Unity features, see the
applicable Licensing for Cisco Unity white paper, at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_white_papers_list.html.
In This Chapter
In this chapter, you will find procedures for setting up and upgrading Digital Networking, followed by
detailed discussions of the concepts and terminology you need to understand. See the following sections:
Setting Up Digital Networking, page 2-3—This section describes the prerequisites for setting up
Digital Networking, and provides a task list containing a high-level view of all of the tasks that you
need to complete for the setup, and the order in which they should be completed.
Procedures for Setting Up Cisco Unity to Use Digital Networking, page 2-4—This section contains
all of the procedures necessary to set up Cisco Unity for Digital Networking.
Digital Networking Concepts and Definitions, page 2-14—This section explains Digital Networking
concepts in detail. If you are unfamiliar with Digital Networking, we recommend that you read this
section prior to completing the setup procedures.
Notable Behavior, page 2-24—This section contains information about notable behavior related to
Digital Networking.
Related Documentation
Accessing Voice Mail in Multiple Unity Server Environments, at
http://www.cisco.com/warp/public/788/AVVID/one_message_button_two_unity_servers.html.