h. From the 'Proxy Redundancy Mode' drop-down list, select Homing.
Figure 27-7: 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.
27.5 Advanced SAS Configuration
This section describes the configuration of advanced SAS features that can optionally be
implemented in your SAS deployment.
27.5.1 Manipulating URI user part of Incoming REGISTER
There are scenarios in which the UAs register to the proxy server with their full phone
number (for example, "976653434"), but can receive two types of INVITE messages (calls):
INVITES whose destination is the last four digits of the UAs' phone number ("3434" in
our example) when it is an internal call within the enterprise
Therefore, it is important that the device registers the UAs in the SAS registered database
with their extension numbers (for example, "3434") in addition to their full numbers. To do
this, you can define a manipulation rule to manipulate the SIP Request-URI user part of the
AOR (in the To header) in incoming REGISTER requests. Once manipulated, it is saved in
this manipulated format in the SAS registered users database in addition to the original
(un-manipulated) AOR.
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