SIP User's Manual 346 Document #: LTRT-65412
MP-11x & MP-124
6.15.2 Voice Parameters
The voice parameters are described in the table below.
Table 6-56: Voice Parameters
Parameter Description
Web/EMS: Input Gain
[InputGain]
Pulse-code modulation (PCM) input gain control (in decibels).
This parameter sets the level for the received (Tel-to-IP)
signal.
The valid range is -32 to 31 dB. The default value is 0 dB.
Web: Voice Volume
EMS: Volume (dB)
[VoiceVolume]
Voice gain control (in decibels). This parameter sets the level
for the transmitted (IP-to-Tel) signal.
The valid range is -32 to 31 dB. The default value is 0 dB.
[VoicePayloadFormat]
Determines the bit ordering of the G.726/G.727 voice payload
format.
 [0] = Little Endian (default)
 [1] = Big Endian
Note: To ensure high voice quality when using G.726/G.727,
both communicating ends should use the same endianness
format. Therefore, when the device communicates with a third-
party entity that uses the G.726/G.727 voice coder and voice
quality is poor, change the settings of this parameter (between
Big Endian and Little Endian).
MF Transport Type
[MFTransportType]
Currently, not supported.
Enable Answer Detector
[EnableAnswerDetector]
Currently, not supported.
Answer Detector Activity Delay
[AnswerDetectorActivityDelay]
Currently, not supported.
Answer Detector Silence Time
[AnswerDetectorSilenceTime]
Currently, not supported.
Answer Detector Redirection
[AnswerDetectorRedirection]
Currently, not supported.
Answer Detector Sensitivity
[AnswerDetectorSensitivity]
Determines the Answer Detector sensitivity.
The range is 0 (most sensitive) to 2 (least sensitive). The
default is 0.
Web: Silence Suppression
EMS: Silence Compression Mode
[EnableSilenceCompression]
Silence Suppression is a method for conserving bandwidth on
VoIP calls by not sending packets when silence is detected.
 [0] Disable = Silence Suppression is disabled (default).
 [1] Enable = Silence Suppression is enabled.
 [2] Enable without Adaptation = A single silence packet is
sent during a silence period (applicable only to G.729).
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'.
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