MP-1xx SIP
MP-1xx SIP User’s Manual 114 Document #: LTRT-65404
Table 5-31: Channel Settings, Voice Settings Parameters
Parameter Description
Voice Volume
[VoiceVolume]
Voice gain control in dB. This parameter sets the level for the transmitted
(IPTel) signal.
You can enter a value from -32 to 31 dB.
The default value is 0 dB.
Input Gain
[InputGain]
PCM input gain control in dB. This parameter sets the level for the received
(TelIP) signal.
You can enter a value from -32 to 31 dB.
The default value is 0 dB.
Note: This parameter is intended for advanced users. Changing it affects other
gateway functionalities.
Silence Suppression
[EnableSilenceCompression]
The parameter SCE is used to maintain
backward compatibility.
Disable [0] = Silence Suppression disabled (default).
Enable [1] = Silence Suppression enabled.
Enable without adaptation [2] = A single silence packet is sent during silence
period (applicable only to G.729).
Silence Suppression is a method conserving bandwidth on VoIP calls by not
sending packets when silence is detected.
Note: If the selected coder is G.729, the following rules determine the value of
the “annexb” parameter of the fmtp attribute in the SDP.
EnableSilenceCompression = 0 “annexb=no”.
EnableSilenceCompression = 1 “annexb=yes”.
EnableSilenceCompression = 2 and IsCiscoSCEMode = 0 “annexb=yes”.
EnableSilenceCompression = 2 and IsCiscoSCEMode = 1 “annexb=no”.
Echo Canceler
[EnableEchoCanceller]
The parameter ECE is used to maintain
backward compatibility.
Off [0] = Echo Canceler disabled.
On [1] = Echo Canceler enabled (default).
DTMF Transport Type
[DTMFTransportType]
0 = Erase digits from voice stream, do not relay to remote.
2 = Digits remain in voice stream.
3 = Erase digits from voice stream, relay to remote according to RFC 2833.
Note: This parameter is automatically updated if one of the following
parameters is configured: IsDTMFUsed, TxDTMFOption or RxDTMFOption.
MF Transport Type
[MFTransportType]
N/A.
DTMF Volume (-31 to 0 dB)
[DTMFVolume]
DTMF level for regenerated digits to PSTN side (-31 to 0, corresponding to -31
dBm to 0 dBm in 1 dB steps, default = -11 dBm).
Enable Answer Detector
[EnableAnswerDetector]
N/A.
Answer Detector Activity Delay
[AnswerDetectorActivityDelay]
N/A.
Answer Detector Silence Time
[AnswerDetectorSilenceTime]
N/A.
Answer Detector Redirection
[AnswerDetectorRedirection]
N/A.
Answer Detector Sensitivity
[AnswerDetectorSensitivity]
Determines the Answer Detector sensitivity.
The range is 0 (most sensitive) to 2 (least sensitive).
The default is 0.
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