Version 5.8
491
October 2009
SIP User's Manual
9. IP Telephony Capabilities
Using INFO message according to Korea mode:
DTMF digits are carried to the
remote side in INFO messages. To enable this mode, define the following:
•
RxDTMFOption = 0 (
ini
file); 'Declare RFC 2833 in SDP' field = 'No'
•
TxDTMFOption = 3 (
ini
file); '1
st
to 5
th
Tx DTMF Option' field = 'INFO (Korea)'
Note that in this mode, DTMF digits are erased from the audio stream
(DTMFTransportType is automatically set to 0 (DTMF Mute)).
Notes:
•
The device is always ready to receive DTMF packets over IP in all
possible transport modes: INFO messages, NOTIFY, and RFC 2833 (in
proper payload type) or as part of the audio stream.
•
To exclude RFC 2833 Telephony event parameter from the device's
SDP, set RxDTMFOption to 0 in the
ini
file.
The following parameters affect the way the device handles the DTMF digits:
TxDTMFOption, RxDTMFOption, and RFC2833PayloadType
MGCPDTMFDetectionPoint, DTMFVolume, DTMFTransportType, DTMFDigitLength,
and DTMFInterDigitInterval (refer to ''Channel Parameters'' on page
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