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Design Guide for Cisco Unity Release 5.x
OL-14619-01
Chapter 2 Cisco Unity Concepts
Hardware Components of a Cisco Unity System
Cisco Unity can also be integrated with multiple telephone systems. For more information, see the
Multiple Telephone System Integrations Guide for Cisco
Unity 5.0 at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_installation_and_configuration_g
uides_list.html.
One or More Cisco Unity Servers
For a detailed list of servers that are qualified for use with Cisco Unity, see the Cisco Unity Supported
Platforms List at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_data_sheets_list.html.
Each qualified Cisco Unity server can service a specified number of Cisco Unity subscribers depending
on the type of server and, for Voice Messaging configurations, depending on whether Exchange is
installed on the Cisco
Unity server. The Cisco Unity Supported Platforms List indicates how many
subscribers can be serviced by each type of server.
For Unified Messaging configurations, at least one Cisco Unity server is required for each:
• Domino domain
• Exchange organization
If the customer purchases Cisco Unity failover, two Cisco Unity servers are required:
• The primary server, which takes calls the majority of the time; and
• The secondary server, which takes calls when the customer wants to perform maintenance on the
primary server or when the primary server stops functioning for any reason.
If the customer purchases Voice Recognition licenses, one voice-recognition server is required for each
Cisco
Unity server. For a list of servers that are qualified as voice-recognition servers, see the
Cisco
Unity Supported Platforms List at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_data_sheets_list.html.
Note Voice recognition is not supported with phone system integrations that use voice cards.
Voice Cards or PIMG Units (Required for Integrations with Circuit-Switched
Phone Systems)
If the customer integrates Cisco Unity with a circuit-switched phone system, either voice cards or PIMG
units are required. For a list of supported voice cards, see the Supported Hardware and Software, and
Support Policies for Cisco
Unity Release 5.x at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_installation_guides_list.html.
Expansion Chassis (Required Only for Some Integrations with Circuit-Switched
Phone Systems)
If the customer is integrating Cisco Unity with a circuit-switched phone system and needs more voice
cards than will fit in the Cisco
Unity server, an expansion chassis is required for the voice cards (see the
Cisco
Unity Supported Platforms List at
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_data_sheets_list.html for more