Version 5.8 319 September 2009
SIP User's Manual 6. Configuration Parameters Reference
6.11.2 Tone Detection Parameters
The signal tone detection parameters are described in the table below.
Table 6-48: Tone Detection Parameters
Parameter Description
Answer Supervision
[EnableVoiceDetection]
Enables sending of 200 OK upon detection of speech, fax, or
modem.
 [1] Yes = The device sends SIP 200 OK (to INVITE)
messages when speech/fax/modem is detected.
 [0] No = The device sends SIP 200 OK only after it
completes dialing(default).
Typically, this feature is used only when early media
(EnableEarlyMedia) is used to establish the voice path before
the call is answered.
Notes:
 This feature is applicable only for one-stage dialing (FXO).
 This parameter is applicable only to FXO interfaces.
EMS: DTMF Enable
[DTMFDetectorEnable]
Enables or disables detection of DTMF signaling.
 [0] = Disable
 [1] = Enable (default)
EMS: MF R1 Enable
[MFR1DetectorEnable]
Enables or disables detection of MF-R1 signaling.
 [0] = Disable (default)
 [1] = Enable
EMS: User Defined Tone Enable
[UserDefinedToneDetectorEnable]
Enables or disables detection of User Defined Tones
signaling.
 [0] = Disable (default)
 [1] = Enable
EMS: SIT Enable
[SITDetectorEnable]
Enables or disables Special Information Tone (SIT) detection
according to the ITU-T recommendation E.180/Q.35.
 [0] = Disable (default).
 [1] = Enable.
To disconnect IP-to-CAS calls (applicable for FXO interfaces)
when a SIT tone is detected, the following parameters must
be configured:
 SITDetectorEnable = 1
 UserDefinedToneDetectorEnable = 1
 DisconnectOnBusyTone = 1 (applicable for Busy, Reorder
and SIT tones)
Notes:
 For this parameter to take effect, a device reset is
required.
 For IP-to-CAS calls, detection of Busy, Reorder, or SIT
tones disconnect the call in any call state.
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