AudioCodes Mediant 3000 User Manual page 912

Parameter
[UseSIPURIForDiversionH
eader]
[TimeoutBetween100And1
8x]
[EnableImmediateTrying]
[TransparentCoderPresent
ation]
[IgnoreRemoteSDPMKI]
Comfort Noise Generation
Negotiation
com-noise-gen-nego
[ComfortNoiseNegotiation]
User's Manual
as the suffix (e.g., e622125519100104). Once modified, the device can
then manipulate the number further, using the Number Manipulation
tables to leave only the last 3 digits (for example) for sending to a PBX.
Defines the URI format in the SIP Diversion header.

[0] = 'tel:' (default)

[1] = 'sip:'
Defines the timeout (in msec) between receiving a 100 Trying response
and a subsequent 18x response. If a 18x response is not received within
this timeout period, the call is disconnected.
The valid range is 0 to 180,000 (i.e., 3 minutes). The default is 32000
(i.e., 32 sec).
Determines if and when the device sends a 100 Trying in response to an
incoming INVITE request.

[0] = 100 Trying response is sent upon receipt of a Proceeding
message from the PSTN.

[1] = (Default) 100 Trying response is sent immediately upon receipt
of INVITE request.
Determines the format of the Transparent coder representation in the
SDP.

[0] = clearmode (default)

[1] = X-CCD
Determines whether the device ignores the Master Key Identifier (MKI) if
present in the SDP received from the remote side.

[0] Disable (default)

[1] Enable
Enables negotiation and usage of Comfort Noise (CN) for Gateway calls.

[0] Disable

[1] Enable (default)
The use of CN is indicated by including a payload type for CN on the
media description line of the SDP. The device can use CN with a codec
whose RTP time stamp clock rate is 8,000 Hz (G.711/G.726). The static
payload type 13 is used. The use of CN is negotiated between sides.
Therefore, if the remote side doesn't support CN, it is not used.
Regardless of the device's settings, it always attempts to adapt to the
remote SIP UA's request for CNG, as described below.
To determine CNG support, the device uses the
ComfortNoiseNegotiation parameter and the codec's SCE (silence
suppression setting) using the CodersGroup parameter.
If the ComfortNoiseNegotiation parameter is enabled, then the following
occurs:

If the device is the initiator, it sends a "CN" in the SDP only if the SCE
of the codec is enabled. If the remote UA responds with a "CN" in the
SDP, then CNG occurs; otherwise, CNG does not occur.

If the device is the receiver and the remote SIP UA does not send a
"CN" in the SDP, then no CNG occurs. If the remote side sends a
"CN", the device attempts to be compatible with the remote side and
even if the codec's SCE is disabled, CNG occurs.
If the ComfortNoiseNegotiation parameter is disabled, then the device
does not send "CN" in the SDP. However, if the codec's SCE is enabled,
912
Description
Document #: LTRT-89730
Mediant 3000