AudioCodes Mediant 1000

Version 7.2 1007 Mediant 1000B Gateway & E-SBC
User's Manual 62. Configuration Parameters Reference
Parameter Description
[TimeoutBetween100And18
x]
The valid range is 0 to 180,000 (i.e., 3 minutes). The default is 32000
(i.e., 32 sec).
configure voip > sip-
definition settings >
immediate-trying
[EnableImmediateTrying]
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.
configure voip > sip-
definition settings > trans-
coder-present
[TransparentCoderPresentat
ion]
Determines the format of the Transparent coder representation in the
SDP.
 [0] = clearmode (default)
 [1] = X-CCD
configure voip > sip-
definition settings >
ignore-remote-sdp-mki
[IgnoreRemoteSDPMKI]
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
Comfort Noise Generation
Negotiation
configure voip > media rtp-
rtcp > com-noise-gen-nego
[ComfortNoiseNegotiation]
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, then CNG occurs.
Note: The parameter is applicable only to the Gateway application.
configure voip > sip-
definition settings > sdp-
ecan-frmt
[SDPEcanFormat]
Defines the echo canceller format in the outgoing SDP. The 'ecan'
attribute is used in the SDP to indicate the use of echo cancellation.
 [0] = (Default) The 'ecan' attribute appears on the 'a=gpmd' line.

[1]
= The 'ecan' attribute appears as a separate attribute.