AudioCodes Mediant 4000 SBC, User Manual

Page: 434 / 1037

CHAPTER 19 Coders and Profiles
Mediant 4000 SBC | User's Manual
Parameter Description
In non-standard behavior (when the parameter is configured
to Disable), the device forwards all the SDP answers with
the same tag. In the example, endpoint "tag 3" is sent with
the same tag as endpoint "tag 2" (i.e., To:
sip:200@B;tag=tag2).
■ [-1] According to Operation Mode = (Default)
Depends on the setting of the 'Operation Mode'
parameter in the IP Group 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]. In addition, the
device preserves the From tags and Call-IDs of the
endpoints in the SDP answer sent to the SIP
entity.
■ [0] Disable = Device sends the multiple SDP answers
with the same To-header tag, to the SIP entity. In other
words, this option is relevant if the SIP entity does not
support multiple dialogs (and multiple tags). However,
non-standard, multiple answer support may still be
configured by the SBCRemoteMultipleAnswersMode
parameter.
■ [1] Enable = Device sends the multiple SDP answers
with different To-header tags, to the SIP entity. In other
words, the SIP entity supports standard multiple SDP
answers (with different To-header tags). In this case,
the SBCRemoteMultipleAnswersMode parameter is
ignored.
Note: If the parameter and the
SBCRemoteMultipleAnswersMode parameter are
disabled, multiple SDP answers are not reflected to the
SIP entity (i.e., the device sends the same SDP answer in
multiple 18x and 200 responses).
'Remote Multiple Answers
Mode'
sbc-multi-answers
[IpProfile_
SBCRemoteMultipleAnswersM
ode]
Enables interworking multiple SDP answers within the
same SIP dialog (non-standard). The parameter enables
the device to forward multiple answers to the SIP entity
associated with the IP Profile. The parameter is applicable
only when the IpProfile_SBCRemoteMultipleEarlyDialogs
parameter is disabled.
■ [0] Disable = (Default) Device always sends the same
SDP answer, which is based on the first received
answer that it sent to the SIP entity, for all forked
responses (even if the 'Forking Handling Mode'
parameter is
Sequential ), and thus, may result in
transcoding.
■ [1] Enable = If the 'Forking Handling Mode' parameter
is configured to Sequential , the device sends multiple
SDP answers.
- 401 -