AudioCodes Mediant 3000 User Manual page 356

Parameter
Web: Remote Renegotiate on
Fax Detection
CLI: sbc-rmt-renegotiate-on-fax-
detect
[IPProfile_SBCRemoteRenegoti
ateOnFaxDetection]
User's Manual
Enables local handling of fax detection and negotiation by the
device on behalf of the SIP entity (to which the IP Profile is
assigned). 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 ID'.

[0] Don't Care = (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.
Notes:

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 this
parameter is set to [1] or [2], while the peer SIP entity must be
assigned an IP Profile where this parameter is set to [2].

This feature is supported only if at least one of the SIP entities
uses the G.711 coder.

This feature utilizes DSP resources. If there are insufficient
resources, the fax transaction fails.
356
Description
Document #: LTRT-89738
Mediant 3000