Configuring the SIP Proxy Server Location for Cisco Unity Express
The Session Initiation Protocol (SIP) proxy server resides on the router where Cisco Unified CME is installed. Beginning in Cisco Unity Express 2.1, Cisco Unified CME can be installed on a different router from where the Cisco Unity Express hardware and software is installed. The SIP proxy server location information must be configured properly to enable all communications between Cisco Unity Express and Cisco Unified CME. The SIP proxy server also enables the message waiting indicators (MWIs) to work with the Cisco Unity Express voice-mail application.
Required Data for This Procedure
The following information is required to configure the SIP proxy server:
•Hostname or IP address of the router where the SIP proxy server resides
•UDP port of the router where the SIP proxy server resides