To configure Gateway application with SAS redundant mode:
1. Define the proxy servers for the Gateway application:
a. Open the Proxy & Registration page (Configuration tab > VoIP menu > SIP
Definitions submenu > Proxy & Registration).
b. From the 'Use Default Proxy' drop-down list, select Yes.
Figure 35-6: Enabling Proxy Server for Gateway Application
c. Click Submit.
d. Open the Proxy Sets Table page (Configuration tab > VoIP menu > Control
Network submenu > Proxy Sets Table).
e. From the 'Proxy Set ID' drop-down list, select 0.
f. In the first 'Proxy Address' field, enter the IP address of the external proxy server.
g. In the second 'Proxy Address' field, enter the IP address and port of the device (in
the format x.x.x.x:port). This is the same port as defined in the 'SAS Local
UDP/TCP/TLS Port' field (see 'Configuring Common SAS Parameters' on page
503).
h. From the 'Proxy Redundancy Mode' drop-down list, select Homing.
Figure 35-7: Defining Proxy Servers for Gateway Application
i. Click Submit.
2. Disable the use of user=phone in the SIP URL:
a. Open the SIP General Parameters page (Configuration tab > VoIP menu > SIP
Definitions submenu > General Parameters).
b. From the 'Use user=phone in SIP URL' drop-down list, select No. This instructs
the Gateway application not to use user=phone in SIP URL and therefore,
REGISTER and INVITE messages use SIP URI. (By default, REGISTER
messages are sent with sip uri and INVITE messages with tel uri.)
c. Click Submit.
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