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 Pulse-code modulation (PCM) input gain control (in decibels).
This parameter sets the level for the received (
[InputGain]
Tel
Web: Voice Volume
EMS: Volume (dB)
-to-IP)
signal.
The valid range is -32 to 31 dB. The default value is 0 dB.
Voice gain control (in decibels). This parameter sets the level
for the transmitted (IP-to-
[VoiceVolume]
Tel
) signal.
The valid range is -32 to 31 dB. The default value is 0 dB.
Determines the bit ordering of the G.726/G.727 voice payload
format.
[VoicePayloadFormat]
[0]
= Little Endian (default)
[1] = Big Endian
Note:
MF Transport Type
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).
Currently, not supported.
[MFTransportType]
Enable Answer Detector Currently, not supported.
[EnableAnswerDetector]
Answer Detector Activity Delay Currently, not supported.
[AnswerDetectorActivityDelay]
Answer Detector Silence Time Currently, not supported.
[AnswerDetectorSilenceTime]
Answer Detector Redirection Currently, not supported.
[AnswerDetectorRedirection]
Answer Detector Sensitivity Determines the Answer Detector sensitivity.
The range is 0 (most sensitive) to 2 (least sensitive). The
default is 0.
[AnswerDetectorSensitivity]
Web: Silence Suppression
EMS: Silence Compression Mode
Silence Suppression is a method for conserving bandwidth on
VoIP calls by not sending packets when silence is detected.
[EnableSilenceCompression]
[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 EnableSilenceCompression is 0: 'annexb=no'.
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 1: 'annexb=yes'.