Installation and Configuration Manual
4. Configuring the Enhanced Media Gateway
SBA for Microsoft Lync
61
December 2010
4.2
Defining Reasons for Alternative Routing
A 503 SIP response from the Mediation Server to an INVITE must cause the Media Gateway to
perform a failover. To achieve this requirement, you need to configure the Reasons for Alternative
Routing for Tel-to-IP calls to be a 503 SIP response.
¾
To define SIP Reason for Alternative Routing:
1.
Open the 'Reasons for Alternative Routing' page (
Configuration
tab >
Protocol
Configuration
menu >
Routing Tables
submenu >
Reasons for Alternative Routing
).
Figure
4-5: Reasons for Alternative Routing Page
2.
Under the Tel to IP Reasons group, for Reason 1 select ‘503’.
3.
Click
Submit
.
4.
Open the 'Admin" page, by appending the case-sensitive suffix ‘AdminPage’ to the Media
Gateway's IP address in your Web browser's