AudioCodes Mediant 1000 User Manual page 271

SIP User's Manual
3. Using NOTIFY messages according to <draft-mahy-sipping-signaled-digits-01.txt>:
In this mode DTMF digits are carried to the remote side using NOTIFY messages.
To enable this mode set:
•
'RxDTMFOption = 0' (Declare RFC 2833 in SDP = No)
•
'TxDTMFOption = 2' (1
Note that in this mode DTMF digits are erased from the audio stream
(DTMFTransportType is automatically set to 0 (DTMF Mute)).
4. Using
In this mode, DTMF digits are carried to the remote side as part of the RTP stream in
accordance
To enable this mode set:
•
'TxDTMFOption = 4' (1
•
'RxDTMFOption = 3' (Declare RFC 2833 in SDP = Yes)
Note that to set the RFC 2833 payload type with a different value (other than its
default, 96) configure the 'RFC2833PayloadType' (RFC 2833 Payload Type)
parameter. The gateway negotiates the RFC 2833 payload type using local and
remote SDP and sends packets using the PT from the received SDP. The gateway
expects to receive RFC 2833 packets with the same PT as configured by the
'RFC2833PayloadType' parameter. If the remote side doesn't include 'telephony-
event' in its SDP, the gateway sends DTMF digits in transparent mode (as part of the
voice stream).
5. Sending DTMF digits (in RTP packets) as part of the audio stream (DTMF Relay is
disabled):
Note that this method is normally used with G.711 coders; with other LBR coders the
quality
To ser this mode:
•
'TxDTMFOption = 0' (1
•
'RxDTMFOption = 0' (Declare RFC 2833 in SDP = No)
•
'DTMFTransportType = 2' (DTMF Transport Type = Transparent DTMF)
Note 1:
Note 2:
The following parameters affect the way the Mediant 1000 SIP handles the DTMF digits:
TxDTMFOption, RxDTMFOption and RFC2833PayloadType (described in
MGCPDTMFDetectionPoint, DTMFDigitLength and DTMFInterDigitInterval (Section
6.5.13
DTMFVolume and DTMFTransportType
Version 5.0
st
RFC 2833
with
st
of the
st
The gateway 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 gateway's
SDP, set 'RxDTMFOption = 0' in the ini file.
on page 255).
th
to 5 DTMF Option = NOTIFY)
relay with
RFC
th
to 5 DTMF Option = RFC 2833)
DTMF
th
to 5 DTMF Option = Disable)
(Table 5-28).
271
9. Telephony Capabilities
Payload type
2833
digits is
December 2006
negotiation:
standard.
reduced.
Table 5-6).