Specifications

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Cisco Unity Express Voice-Mail and Auto-Attendant CLI Administrator Guide for 3.0 and Later Versions
OL-14010-09
Chapter 5 Configuring System Components
Configuring SIP Call Control Parameters
Note The Cisco Unity Express AIM-CUE/AIM2-CUE, NM-CUE, NM-CUE-EC and ISM-SRE-300-K9
modules support only one Cisco Unified CME system.
Geographically dispersed Cisco Unified CME systems can be connected to Cisco Unity Express across
a WAN link. Cisco Unity Express can be co-located with one of these Cisco Unified CME systems,
although it is not required.
Figure 5-1 Centralized Cisco Unity Express Deployment Topology
To interconnect more than ten Cisco Unified CME systems, you can use
Cisco Unified Messaging Gateway to interconnect multiple Cisco Unity, Cisco Unity Express, and third
party messaging systems.
Note Cisco Unity Express does not support importing and/or managing Cisco Unified CME Extension
Mobility (EM) users, only ephone users.
To receive the greatest benefit from the centralization feature, you must configure a single central
Cisco Unified CME gateway to manage the company’s dial-plan. This central Cisco Unified CME
gateway is called the “local” site and is a predefined site on the system. The local site cannot be deleted.
Cisco Unity Express uses one SIP gateway for all outgoing calls and faxes. This SIP gateway must be
aware of the company’s dial-plan and be capable of routing calls from Cisco Unity Express to any
Cisco Unified CME in the network. This gateway is configured independently of the sites, but by default,
it routes to the Cisco Unified CME at the local site.
271576
Los Angeles
San Francisco
San Jose
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Cisco Unity Express
Headquarters
PSTN WAN
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