Medias Mediatrix 1204, Справочное руководство

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Chapter 16 - Voice Transmissions DTMF Transport Type
208 Mediatrix 1204
DTMF Transport over the SIP Protocol
You can select the method used to transport DTMFs out-of-band over the SIP protocol.
This feature is effective only if the voiceIfDtmfTransport variable is set to outOfBandUsingSignalingProtocol
(see “DTMF Transport Type” on page 205 for more details).
X
To select the DTMF transport method over the SIP protocol:
1. In the voiceIfMIB , set the DTMF transport type in the voiceIfDtmfTransport variable to
outOfBandUsingSignalingProtocol .
2. In the sipInteropMIB , set the DTMF transport type in the sipInteropDtmfTransportMethod variable
( sipInteropDtmfTransportBySipProtocol group).
The following methods are available:
3. Set the DTMF duration sent in the INFO message when using the infoDtmfRelay method to
transmit DTMFs in the sipInteropDtmfTransportDuration variable.
This value is expressed in milliseconds (ms). The default value is 100 ms.
4. In the analogScnGwMIB , set the DTMF duration when using the infoDtmfRelay method to receive
DTMFs in the analogScnGwDtmfDuration variable.
This is the duration, in milliseconds (ms), a DTMF is played when dialing the destination phone
number.
5. Set an inter-digit dial delay in the analogScnGwInterDigitDial Delay variable.
This is the delay, in milliseconds (ms), between two DTMFs when dialing the destination phone
number. This is useful when the Mediatrix 1204 receives DTMFs out-of-band faster than it can
signal them.
6. Restart the Mediatrix 1204 so that the changes may take effect.
Standards Supported • draft-choudhuri-sip-info-digit-00.txt
Table 133: DTMF Out-of-Band Transport Methods
Method Description
draftChoudhuriSipInfoDigit00 Transmits DTMFs by using the method defined in draft-
choudhuri-sip-info-digit-00 . Only the unsolicited-digit part is
supported.
infoDtmfRelay Transmits DTMFs by using a custom method. This custom
method requires no SDP negotiation and assumes that the other
peer uses the same method.
It uses a SIP INFO message with a content of type application/
dtmf-relay . The body of the message contains the DTMF
transmitted and the duration of the DTMF:
Signal= 1
Duration= 160
When transmitting, the duration is the one set in the
sipInteropDtmfTransportDuration variable (see Step 3 below).
When receiving, the duration of the DTMF received is not used.
The value is the one set in the
analogScnGwDtmfDuration
variable (see Step 4 below).
DTMFs are transmitted one at a time. It is thus not compatible
with the PIN dialing feature (see
“PIN Dialing” on page 258 for
more details).
Available digits are “0123456789ABCD*#”. The Mediatrix 1204
also supports the “,;p” characters when receiving DTMFs.