AudioCodes E-SBC User Manual page 439

CHAPTER 19 Coders and Profiles
Parameter
'Remote Early Media Response
Type'
sbc-rmt-early-media-
resp
[IpProfile_
SBCRemoteEarlyMediaRespon
seType]
'Remote Multiple Early Dialogs'
sbc-multi-early-diag
[IpProfile_
SBCRemoteMultipleEarlyDialo
gs]
Mediant 1000 Gateway & E-SBC | User's Manual
Description
■ [1] Supported = (Default) Multiple 18x responses are
forwarded to the caller.
Defines the SIP provisional response type - 180 or 183 - for
forwarding early media to the caller, for the SIP entity
associated with the IP Profile.
■ [0] Transparent = (Default) All early media response
types are supported; the device forwards all responses
as is (unchanged).
■ [1] 180 = Early media is sent as 180 response only.
■ [2] 183 = Early media is sent as 183 response only.
Defines the device's handling of To-header tags in call
forking responses (i.e., multiple SDP answers) sent to the
SIP entity associated with the IP Profile. When the SIP
entity initiates an INVITE that is subsequently forked (for
example, by a proxy server) to multiple endpoints, the
endpoints respond with a SIP 183 containing an SDP
answer. Typically, each endpoint's response has a
different To-header tag. For example, a call initiated by the
SIP entity (100@A) is forked and two endpoints respond
with ringing, each with a different tag:
■ Endpoint "tag 2":
SIP/2.0 180 Ringing
From: <sip:100@A>;tag=tag1
To: sip:200@B;tag=tag2
Call-ID: c2
■ Endpoint "tag 3":
SIP/2.0 180 Ringing
From: <sip:100@A>;tag=tag1
To: sip:200@B;tag=tag3
Call-ID: c2
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.
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