AudioCodes Mediant 3000 User Manual page 419

User's Manual
Parameter
[IPProfile_SBCRemoteRenegoti
ateOnFaxDetection]
SDP Ptime Answer
[IpProfile_SBCSDPPtimeAnswe
r]
Preferred Ptime
[IpProfile_SBCPreferredPTime]
Use Silence Suppression
sbc-use-silence-supp
[IpProfile_SBCUseSilenceSupp]
Version 7.0
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'.

[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.
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 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.
Defines the packetization time (ptime) of the coder in RTP packets
for the SIP entity associated with the IP Profile. This is useful when
implementing transrating.

[0] Remote Answer = (Default) Use ptime according to SDP
answer.

[1] Original Offer = Use ptime according to SDP offer.

[2] Preferred Value= Use preferred ptime for negotiation, if
configured by the 'Preferred Ptime' parameter.
Note: DSPs are required for this functionality.
Defines the packetization time (in msec) for the SIP entity
associated with the IP Profile if the 'SBC SDP Ptime Answer'
parameter (see above) is set to Preferred Value.
The valid range is 0 to 200. The default is 0 (i.e., preferred ptime is
not used).
Defines silence suppression support for the SIP entity associated
with the IP Profile

[0] Transparent = (Default) Forward as is.

[1] Add = Enable silence suppression for each relevant coder
listed in the SDP.

[2] Remove = Disable silence suppression for each relevant
419
20. Coders and Profiles
Description
Mediant 3000