SIP User's Manual 300 Document #: LTRT-65415
MediaPack Series
8.3.3.5.6 Adding SIP Record-Route Header to SIP INVITE
You can configure SAS to add the SIP Record-Route header to SIP requests (e.g. INVITE)
received from the enterprise UAs. SAS then sends the request with this header to the
proxy. The Record-Route header includes the IP address of the SAS application. This
ensures that future requests in the SIP dialog session from the proxy to the UAs are routed
through the SAS application. If not configured, future request within the dialog from the
proxy are sent directly to the UAs (and do not traverse SAS).
This feature can only be configured using the SASEnableRecordRoute ini file parameter.
Note: This feature is applicable only to SAS outbound mode.
When this feature is enabled, the SIP Record-Route header includes the URI "lr"
parameter. The presence of this parameter indicates loose routing; the lack of it indicates
strict routing. For example:
Loose routing:
Record-Route: <sip:server10.biloxi.com;lr>
Strict routing:
Record-Route: <sip:server10.biloxi.com;lr>
8.3.3.5.7 Replacing Contact Header for SIP Messages
You can configure SAS to change the SIP Contact header so that it points to the SAS host.
Therefore, this ensures that in the message, the top-most SIP Via header and the Contact
header point to the same host.
Note:
• This feature is applicable only to SAS outbound mode.
• The device may become overloaded if this feature is enabled, as all
incoming SIP dialog requests traverse the SAS application.
Currently, this feature can only be configured using the SASEnableContactReplace ini file
parameter.
[0] (default): Disable - when relaying requests, SAS adds a new Via header (with the
IP address of the SAS application) as the top-most Via header and retains the original
Contact header. Thus, the top-most Via header and the Contact header point to
different hosts.
[1]: Enable - SAS changes the Contact header so that it points to the SAS host and
therefore, the top-most Via header and the Contact header point to the same host.
8.3.4 Viewing Registered SAS Users
You can view all the users that are registered in the SAS registration database. This is
displayed in the 'SAS/SBC Registered Users' page, as described in ''Viewing SAS/SBC
Registered Users'' on page 187. T
he maximum number of users that can be registered in
the database is 25.
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