AudioCodes mediapack MP-500 User Manual page 357

SIP User's Manual
Parameter
DTMF Parameters
EMS: Use End of DTMF
[MGCPDTMFDetectionPoint]
Web: Declare RFC 2833 in SDP
EMS: Rx DTMF Option
[RxDTMFOption]
Web/EMS: Tx DTMF Option
[TxDTMFOption]
Version 5.8
considered an off-hook or on-hook event.
b) Hook-flash generation period upon detection of a SIP INFO
message containing a hook-flash signal.
FXO interfaces: Hook-flash generation period.
Notes:
For FXO interfaces, a constant of 100 msec must be added to
the required hook-flash period. For example, to generate a
450 msec hook-flash, set this parameter to 550.
For this parameter to take effect, you need to reset the
device.
Defines when the detection of DTMF events is notified.
[0] = DTMF event is reported at the end of a detected DTMF
digit.
[1] = DTMF event is reported at the start of a detected DTMF
digit (default).
Defines the supported Receive DTMF negotiation method.
[0] No = Don't declare RFC 2833 telephony-event parameter
in SDP.
[3] Yes = Declare RFC 2833 telephony-event parameter in
SDP (default).
The device is designed to always be receptive to RFC 2833
DTMF relay packets. Therefore, it is always correct to include the
'telephony-event' parameter as default in the SDP. However,
some devices use the absence of the 'telephony-event' in the
SDP to decide to send DTMF digits in-band using G.711 coder. If
this is the case, you can set RxDTMFOption to 0.
Determines a single or several preferred transmit DTMF
negotiation methods.
[0] Not Supported = No negotiation - DTMF digits are sent
according to the parameters DTMFTransportType and
RFC2833PayloadType (default).
[1] INFO (Nortel) = Sends DTMF digits according to IETF
<draft-choudhuri-sip-info-digit-00>.
[2] NOTIFY = Sends DTMF digits according to IETF <draft-
mahy-sipping-signaled-digits-01>.
[3] INFO (Cisco) = Sends DTMF digits according to Cisco
format.
[4] RFC 2833.
[5] INFO (Korea) = Sends DTMF digits according to Korea
Telecom format.
Notes:
DTMF negotiation methods are prioritized according to the
order of their appearance.
When out-of-band DTMF transfer is used ([1], [2], [3], or [5]),
the parameter DTMFTransportType is automatically set to 0
(DTMF digits are erased from the RTP stream).
357
6. Configuration Parameters Reference
Description
October 2009