3Com V6100, User Manual Manual, Page: 196 / 496

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V6100 and V7122 User Guide
ini File Field Name
Web Parameter Name
Valid Range and Description
TxDTMFOption
[DTMF RFC2833
Negotiation]
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).
3 (INFO Cisco) = Sends DTMF digits according with Cisco format.
4 (RFC 2833).
5 (INFO Nortel) = Sends DTMF digits according with IETF <draft-
choudhuri-sip-info-digit-00>.
6 (NOTIFY) = Sends DTMF digits according with <draft-mahy-sipping-
signaled-digits-01>.
DTMF negotiation methods are prioritized according to the
order of their appearance.
When out-of-band DTMF transfer is used (3, 5 or 6), the
parameter ‘DTMFTransportType’ is automatically set to 0
(DTMF digits are erased from the RTP stream).
When RFC 2833 (2) is selected, the gateway:
•
Negotiates RFC 2833 Payload Type (PT) using local and
remote SDPs.
•
Sends DTMF packets using RFC 2833 PT according to
the PT in the received SDP.
•
Expects to receive RFC 2833 packets with the same PT
as configured by the parameter ‘RFC2833PayloadType’.
•
Uses the same PT for send and receive if the remote party
doesn’t include the RFC 2833 DTMF PT in its SDP.
When TxDTMFOption is set to 0, the RFC 2833 PT is set
according to the parameter ‘RFC2833PayloadType’ for both
transmit and receive.
ini file note: The DTMF transmit methods are defined using a
repetition of the same (TxDTMFOption) parameter (up to five
options can be provided).
IsDTMFUsed
[Use Out-of-Band DTMF]
Obsolete parameter, use TxDTMFOption instead.
OutOfBandDTMFFormat
[Out-of-Band DTMF Format]
Obsolete parameter, use TxDTMFOption instead.