AudioCodes Mediant 4000 SBC User Manual page 462

CHAPTER 19 Coders and Profiles
Parameter
'Remote Renegotiate on Fax
Detection'
sbc-rmt-renegotiate-on-
fax-detect
[IPProfile_
SBCRemoteRenegotiateOnFax
Detection]
'Fax Rerouting Mode'
sbc-fax-rerouting-mode
[IpProfile_
SBCFaxReroutingMode]
Media
Description
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 (answering) fax, and does not support
renegotiation if it is the originating fax.
■ [2] No = The SIP entity does not support fax re-
negotiation upon fax detection when it is the originating
or terminating fax.
Note:
■ This feature is applicable only when both SIP entities
do not fully support fax detection (receive or send) and
negotiation: one SIP entity must be assigned an IP
Profile where the parameter is set to [1] or [2], while the
peer SIP entity must be assigned an IP Profile where
the parameter is set to [2].
■ This feature is supported only if at least one of the SIP
entities use the G.711 coder.
■ This feature utilizes DSP resources. If there are
insufficient resources, the fax transaction fails.
Enables the rerouting of incoming SBC calls that are
identified as fax calls to a new IP destination.
■ [0] Disable (default)
■ [1] Rerouting without delay
For more information, see
Fax Destinations.
Note: Configure the parameter for the IP leg that is
interfacing with the fax termination.
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Mediant 4000 SBC | User's Manual
Configuring Rerouting of Calls to