AudioCodes Mediant 4000 SBC User Manual page 451

CHAPTER 19 Coders and Profiles
Parameter
'Keep Incoming Via Headers'
sbc-keep-via-headers
[IpProfile_
SBCKeepVIAHeaders]
'Keep Incoming Routing
Headers'
sbc-keep-routing-
headers
[IpProfile_
SBCKeepRoutingHeaders]
Description
✔
B2BUA: Device operates as if the parameter is set
to Replace Contact [0].
✔
Call State-full Proxy: Device operates as if the
parameter is set to Add Routing Headers [1].
■ [0] Replace Contact = The URI host part in the
Contact header of the received message (from the
other side) is replaced with the device's address or with
the value of the 'SIP Group Name' parameter
(configured in the IP Groups table) in the outgoing
message sent to the SIP entity.
■ [1] Add Routing Headers = Device adds a Record-
Route header for itself to outgoing messages
(requests\responses) sent to the SIP entity in dialog-
setup transactions. The Contact header remains
unchanged.
■ [2] Transparent = Device doesn't change the Contact
header and doesn't add a Record-Route header for
itself. Instead, it relies on its' own inherent mechanism
to remain in the route of future requests in the dialog (for
example, relying on the way the endpoints are set up or
on TLS as the transport type).
Enables interworking SIP Via headers between SIP
entities. The parameter defines the device's handling of Via
headers for messages sent to the SIP entity associated
with the IP Profile.
■ [-1] According to Operation Mode = Depends on the
setting of the 'Operation Mode' parameter in the IP
Groups table or SRDs table:
✔
B2BUA: Device operates as if the parameter is set
to Disable [0].
✔
Call State-full Proxy: Device operates as if the
parameter is set to Enable [1].
■ [0] Disable = Device removes all Via headers received
in the incoming SIP request from the other leg and adds
a Via header identifying only itself, in the outgoing
message sent to the SIP entity.
■ [1] Enable = Device retains the Via headers received in
the incoming SIP request and adds itself as the top-
most listed Via header in the outgoing message sent to
the SIP entity.
Enables interworking SIP Record-Route headers between
SIP entities. The parameter defines the device's handling
of Record-Route headers for request/response messages
sent to the the SIP entity associated with the IP Profile.
■ [-1] According to Operation Mode = (Default)
Depends on the setting of the 'Operation Mode' in the
IP Group or SRDs table:
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Mediant 4000 SBC | User's Manual