AudioCodes E-SBC User Manual page 461

CHAPTER 19 Coders and Profiles
Parameter
'Remote Replaces Mode'
sbc-rmt-replaces-
behavior
[IpProfile_
SBCRemoteReplacesBehavior]
'Play RBT To Transferee'
sbc-play-rbt-to-xferee
[IpProfile_
SBCPlayRBTToTransferee]
Mediant 1000 Gateway & E-SBC | User's Manual
Description
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 incoming
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.
Enables the device to play a ringback tone to the
transferred party (transferee) during a blind call transfer, for
the SIP entity associated with the IP Profile (which does
not support such a tone generation during call transfer). The
ringback tone indicates to the transferee of the ringing of
the transfer target (to where the transferee is being
transferred).
■ [0] No (Default)
■ [1] Yes
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