AudioCodes Mediant 4000 SBC User Manual page 443

User's Manual
Parameter
Fax Offer Mode
sbc-fax-offer-mode
[IpProfile_SBCFaxOfferMod
e]
Fax Answer Mode
sbc-fax-answer-mode
[IpProfile_SBCFaxAnswerM
ode]
Remote Renegotiate on Fax
Detection
sbc-rmt-renegotiate-on-fax-
detect
[IPProfile_SBCRemoteRene
gotiateOnFaxDetection]
Version 7.2

[2] Handle on re-INVITE = Handle fax according to fax settings in
the IP Profile for all re-INVITE offer-answer transactions (except for
initial INVITE).
Note: The fax settings in the IP Profile include
IpProfile_SBCFaxCodersGroupName, IpProfile_SBCFaxOfferMode,
and IpProfile_SBCFaxAnswerMode.
Defines the coders included in the outgoing SDP offer (sent to the
called "fax") for the SIP entity associated with the IP Profile.

[0] All coders = (Default) Use only (and all) the coders of the
selected Coder Group configured using the
SBCFaxCodersGroupID parameter.

[1] Single coder = Use only one coder. If a coder in the incoming
offer (from the calling "fax") matches a coder in the
SBCFaxCodersGroupID, the device uses this coder. If no match
exists, the device uses the first coder listed in the Coders Group ID
(SBCFaxCodersGroupID).
Note: The parameter is applicable only if you set the
IpProfile_SBCFaxBehavior parameter to a value other than [0].
Defines the coders included in the outgoing SDP answer (sent to the
calling "fax") for the SIP entity associated with the IP Profile.

[0] All coders = Use matched coders between the incoming offer
coders (from the calling "fax") and the coders of the selected Coder
Group (configured using the SBCFaxCodersGroupID parameter).

[1] Single coder = (Default) Use only one coder. If the incoming
answer (from the called "fax") includes a coder that matches a
coder match between the incoming offer coders (from the calling
"fax") and the coders of the selected Coder Group
(SBCFaxCodersGroupID, then the device uses this coder. If no
match exists, the device uses the first listed coder of the matched
coders between the incoming offer coders (from the calling "fax")
and the coders of the selected Coder Group.
Note: The parameter is applicable only if you set the
IpProfile_SBCFaxBehavior parameter to a value other than [0].
Enables local handling of fax detection and negotiation by the device
on behalf of the SIP entity associated with the IP Profile. This applies
to faxes sent immediately upon the establishment of a voice channel
(i.e., after 200 OK).
The device attempts to detect the fax (CNG tone) from the originating
SIP entity within a user-defined interval (see the
SBCFaxDetectionTimeout parameter) immediately after the voice call
is established.
Once fax is detected, the device can handle the subsequent fax
negotiation by sending re-INVITE messages to both SIP entities. The
device also negotiates the fax coders between the two SIP entities.
The negotiated coders are according to the list of fax coders assigned
to each SIP entity, using the IP Profile parameter 'Fax Coders Group'.

[0] Transparent = (Default) Device does not interfere in the fax
transaction and assumes that the SIP entity fully supports fax
renegotiation upon fax detection.

[1] Only on Answer Side = The SIP entity supports fax
renegotiation upon fax detection only if it is the terminating
443
20. Coders and Profiles
Description
Mediant 4000 SBC