SIP User's Manual 426 Document #: LTRT-12801
MP-500 MSBG
Parameter Description
Note: If the selected coder is G.729, the value of the 'annexb'
parameter of the fmtp attribute in the SDP is determined by
the following rules:
 If EnableSilenceCompression is 0: 'annexb=no'.
 If EnableSilenceCompression is 1: 'annexb=yes'.
 If EnableSilenceCompression is 2 and IsCiscoSCEMode is
0: 'annexb=yes'.
 If EnableSilenceCompression is 2 and IsCiscoSCEMode is
1: 'annexb=no'.
Web: Echo Canceler
EMS: Echo Canceller Enable
[EnableEchoCanceller]
Determines whether echo cancellation is enabled and
therefore, echo from voice calls is removed.
 [0] Off = Echo Canceler is disabled.
 [1] On = Echo Canceler is enabled (default).
Note: This parameter is used to maintain backward
compatibility.
EMS: Echo Canceller Hybrid Loss
[ECHybridLoss]
Sets the four wire to two wire worst-case Hybrid loss, the ratio
between the signal level sent to the hybrid and the echo level
returning from the hybrid.
 [0] = 6 dB (default)
 [1] = N/A
 [2] = 0 dB
 [3] = 3 dB
[ECNLPMode]
Defines the echo cancellation Non-Linear Processing (NLP)
mode.
 [0] = NLP adapts according to echo changes (default).
 [1] = Disables NLP.
[EchoCancellerAggressiveNLP]
Enables or disables the Aggressive NLP at the first 0.5 second
of the call. When enabled, the echo is removed only in the first
half a second of the incoming IP signal.
 [0] = Disable (default)
 [1] = Enable
Note: For this parameter to take effect, a device reset is
required.
Web: Enable RFC 3389 CN
Payload Type
EMS: Comfort Noise Enable
[EnableStandardSIDPayloadType]
Determines whether Silence Indicator (SID) packets are sent
according to RFC 3389.
 [0] Disable = G.711 SID packets are sent in a proprietary
method (default).
 [1] Enable = SID (comfort noise) packets are sent with the
RTP SID payload type according to RFC 3389. Applicable
to G.711 and G.726 coders.
[RTPSIDCoeffNum]
Determines the number of spectral coefficients added to an
SID packet being sent according to RFC 3389. Valid only if
EnableStandardSIDPayloadType is set to 1.
The valid values are [0] (default), [4], [6], [8] and [10].
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