Aastra DECT 142 (OMM SIP) Manuel d'utilisateur télécharger pdf (Page 41)

Installation, Administration and Maintenance

Aastra

depl-0794/2.0

Page: 41 (95)

• DTMF Out-of-Band

Used to configure whether DTMF Out-of-Band is preferred or

not.

• DTMF Method

The OMM supports the following DTMF Out-of-Band methods:

o RFC 2833

Transmit DTMF as RTP events according to RFC 2833

(/9/) after the payload type negotiation via SIP/SDP. If the

payload type is not negotiated, “inband” will be used

automatically.

o INFO

The SIP INFO method is used to transmit DTMF tones as

telephone events (application/dftmf-relay). This setting

should be used if RFC 2833 is not supported.

o BOTH

DTMF telephones events are send according to RFC

2833 and as well as SIP INFO method.

Please Note: Possibly, the other party recognises events

twice.

• DTMF Payload Type

If Out-of-Band is enabled the Payload Type specify the payload

type which is used for sending DTMF events based on Section

1.3 reference /9/.

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Aastra DECT 142 (OMM SIP) Manuel d'utilisateur Page 41