through the SAS agent. Each traversed proxy in the path can
insert this header, causing all future dialogs in the session to
pass through it as well.
When this feature is enabled, the SIP Record-Route header
includes the URI "lr" parameter, indicating loose routing, for
example:
Web: SAS Proxy Set
EMS: Proxy Set
[SASProxySet]
Defines the Proxy Set (index number) used in SAS Normal
mode to forward REGISTER and INVITE requests from users
that are served by the SAS application.
The valid range is 0 to 5. The default is 0 (i.e., default Proxy
Set).
Web: Redundant SAS Proxy Set
EMS: Redundant Proxy Set
[RedundantSASProxySet]
Defines the Proxy Set (index number) used in SAS Emergency
mode for fallback when the user is not found in the Registered
Users database. Each time a new SIP request arrives, the SAS
application checks whether the user is listed in the registration
database. If the user is located in the database, the request is
to the next redundant SAS defined in the Redundant SAS Proxy
Set. If that SAS Proxy IP appears in the Via header of the
request, it is not forwarded (thereby, preventing loops in the
request's course). If no such redundant SAS exists, the SAS
sends the request to its default gateway (configured by the
parameter SASDefaultGatewayIP).
The valid range is -1 to 5. The default is -1 (i.e., no redundant
Proxy Set).
Web/EMS: SAS Block
Unregistered Users
[SASBlockUnRegUsers]
Determines whether the device rejects SIP INVITE requests
received from unregistered SAS users. This applies to SAS
Normal and Emergency modes.
 [0] Un-Block = (Default) Allow INVITE from unregistered SAS
users.
 [1] Block = Reject dialog-establishment requests from un-
registered SAS users.
[SASEnableContactReplace]
Enables the device to change the SIP Contact header so that it
points to the SAS host and therefore, the top-most SIP Via
header and the Contact header point to the same host.
 [0] (default) = Disable - when relaying requests, the SAS
agent adds a new Via header (with the SAS IP address) 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 - the device 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.
Note: Operating in this mode causes all incoming dialog
requests to traverse the SAS, which may cause load problems.
Web: SAS Survivability Mode
EMS: Survivability Mode
[SASSurvivabilityMode]
Determines the Survivability mode used by the SAS application.
 [0] Standard = (Default) Incoming INVITE and REGISTER
requests are forwarded to the defined Proxy list of
SASProxySet in Normal mode and handled by the SAS
application in Emergency mode.
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