Version 6.2 411 February 2011
SIP User's Manual 10. Configuration Parameters Reference
Parameter Description
Web: Answer Detector Silence
Time
[AnswerDetectorSilenceTime]
Currently, not supported.
Web: Answer Detector
Redirection
[AnswerDetectorRedirection]
Currently, not supported.
Web: Answer Detector Sensitivity
EMS: 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'.
If EnableSilenceCompression is 2 and IsCiscoSCEMode is 0:
'annexb=yes'.
If EnableSilenceCompression is 2 and IsCiscoSCEMode is 1:
'annexb=no'.
Note: This parameter can also be configured per IP Profile, using
the IPProfile parameter (see ''Configuring IP Profiles'' on page
122).
Web: Echo Canceler
EMS: Echo Canceller Enable
[EnableEchoCanceller]
Enables or disables echo cancellation (i.e., echo from voice calls
is removed).
[0] Off = Echo Canceler is disabled.
[1] On = Echo Canceler is enabled (default).
Notes:
This parameter is used to maintain backward compatibility.
This parameter can also be configured per IP Profile, using the
IPProfile parameter (see ''Configuring IP Profiles'' on page
122) a
nd per Tel Profile, using the TelProfile parameter (see
''Configuring Tel Profiles'' on page 121).
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