User's Manual 312 Document #: LTRT-42060
Mediant 2600 E-SBC
Parameter Description
Web: Remote Replaces
Behavior
CLI: sbc-rmt-replaces-behavior
[IpProfile_SBCRemoteReplaces
Behavior]
Enables the device to handle incoming INVITEs containing the
Replaces header for the SIP entity (which does not support the
header) associated with the IP Profile. The Replaces header is
used to replace an existing SIP dialog with a new dialog such as in
call transfer or call pickup.
[0] Standard = (Default) The SIP entity supports INVITE
messages containing Replaces headers. The device forwards
the INVITE message containing the Replaces header to the SIP
entity. The device may change the value of the Replaces
header to reflect the call identifiers of the leg.
[1] Handle Locally = The SIP entity does not support INVITE
messages containing Replaces headers. The device terminates
the received INVITE containing the Replaces header and
establishes a new call between the SIP entity and the new call
party. It then disconnects the call with the initial call party, by
sending it a SIP BYE request.
[2] Keep as is = The SIP entity supports INVITE messages
containing Replaces headers. The device forwards the
Replaces header as is in inc
oming REFER and outgoing INVITE
messages from/to the SIP entity (i.e., Replaces header's value
is unchanged).
For example, assume that the device establishes a call between A
and B. If B initiates a call transfer to C, the device receives an
INVITE with the Replaces header from C. If A supports the
Replaces header, the device simply forwards the INVITE as is to A;
a new call is established between A and C and the call between A
and B is disconnected. However, if A does not support the
Replaces header, the device uses this feature to terminate the
INVITE with Replaces header and handles the transfer for A. The
device does this by connecting A to C, and disconnecting the call
between A and B, by sending a SIP BYE request to B. Note that if
media transcoding is required, the device sends an INVITE to C on
behalf of A with a new SDP offer.
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