AudioCodes Mediant 800B User Manual page 1308

Parameter
SBC Shared Line Registration Mode
configure voip > sbc settings > sbc-shared-
line-reg-mode
[SBCSharedLineRegMode]
SBC Forking Handling Mode
configure voip > sbc settings > sbc-forking-
handling-mode
[SBCForkingHandlingMode]
Gateway Direct Route Prefix
configure voip > sbc settings > gw-direct-
route-prefix
[GWDirectRoutePrefix]
configure voip > sbc settings > sbc-media-
sync
[EnableSBCMediaSync]
User's Manual
Mediant 800B Gateway & E-SBC
Description

[1] Enable
To configure call forking initiated by the device, see
'Initiating SIP Call Forking' on page 781.
Enables the termination on the device of SIP
REGISTER messages from secondary lines that
belong to the Shared Line feature.

[0] Disable = (Default) Device forwards the
REGISTER messages as is (i.e., not terminated on
the device).

[1] Enable = REGISTER messages of secondary
lines are terminated on the device.
Note: The device always forwards REGISTER
messages of the primary line.
Defines the handling of SIP 18x responses that are
received due to call forking of an INVITE.

[0] Latch On First = (Default) Only the first 18x is
forwarded to the INVITE-initiating UA. If SIP 18x
with SDP is received, the device opens a voice
stream according to the received SDP and
disregards any subsequent 18x forking responses
(with or without SDP). If the first response is 180
without SDP, the device sends it to the other side.

[1] Sequential = All 18x responses are forwarded,
one at a time (sequentially) to the INVITE-initiating
UA. If a 18x arrives with an offer only, then only the
first offer is forwarded to the INVITE-initiating UA
and subsequent 18x responses are discarded.
Defines the prefix destination Request-URI user part
that is appended to the original user part for
alternative IP-to-IP call routing from SBC to Gateway
(Tel) interfaces.
The valid value is a string of up to 16 characters. The
default is "acgateway-<original prefix destination
number>". For example, "acgateway-200".
For more information, see Configuring SBC IP-to-IP
Routing Rules on page 709.
Enables synchronization of media between two SIP
user agents when a call is established between them.
Media synchronization means that the media is
properly negotiated (SDP offer/answer) between the
user agents. In some scenarios, the call is established
despite the media not being synchronized. This may
occur, for example, in call transfer (SIP REFER)
where the media between the transfer target and
transferee are not synchronized. The device performs
media synchronization by sending a re-INVITE
immediately after the call is established in order for
the user agents to negotiate the media (SDP
offer/answer).

[0] Disable = (Default) Media synchronization is
performed only if the RTP mode (e.g., a=sendrecv,
a=sendrecv, a=sendonly, a=recvonly, and
1308 Document #: LTRT-10632