Medias Mediatrix 1204, Reference Manual

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DTMF Transport Type Reference Manual (SIP Version)
Mediatrix 1204 207
If you set the voiceIfDtmfTransport variable to signalingProtocolDependent , the remote party
must select one of the two transport types. Transporting DTMF by using RTP has priority over the
SIP INFO method.
DTMF Payload Type
When selecting the outOfBandUsingRtp DTMF transport mode (see “DTMF Transport Type” on page 205 for
more details), you can determine the actual RTP dynamic payload type used for the “telephone-event” in an
initial offer. The payload types available are as per RFC 1890.
X
To define the DTMF payload type:
1. In the voiceIfMIB , set the DTMF transport type in the voiceIfDtmfTransport variable
( voiceIfDtmfTransportTable group) to outOfBandUsingRtp .
2. Set the payload type in the voiceIfDtmfPayloadType variable.
Available values range from 96 to 127.
DTMF – RFC 2833 Events
You can define which events will be relayed via RFC 2833. This could be very useful in a Remote Line
Extension scenario, as described in
“Remote Line Extension” on page 259 .
X
To define the DTMF enforce default events:
1. In the voiceIfMIB , set the DTMF enforce default events in the voiceIfDtmfEnforceDefaultEvents
variable.
Standards Supported • RFC 1890 – RTP Profile for Audio and Video Conferences
with Minimal Control
Standards Supported • RFC 2833: RTP Payload for DTMF Digits, Telephony Tones
and Telephony Signals
Table 132: DTMF Enforce Default Events
Parameter Description
enable Conformance is enforced and support for RFC 2833 implies the support of basic
telephony-events. When setting the variable
voiceIfDtmfTransport to
outOfBandUsingRtp ( “DTMF Transport Type” on page 205 ), or the variable
telephonyAttributesHookFlashProcessing to outOfBandUsingRtp ( “Hook Flash
Processing” on page 256 ), the Mediatrix 1204 will advertise the support for events
0-15; it will assume support for events 0-15 when support for RFC 2833 is received
in an announcement.
disable This creates a deliberate deviance to RFC 2833 as support of basic events is not
automatic. The variables
voiceIfDtmfTransport and
telephonyAttributesHookFlashProcessing then act independently to specify which
events will be relayed via RFC 2833. If Hook Flash relay is enabled by itself, support
of event 16 alone will be advertised; if both Hook Flash and DTMF relay are
activated, events 0-16 are supported.