Gigaset N670 IP PRO Installation, Configuration And Operation page 37

DTMF over VoIP Connections
DTMF signalling (Dual Tone Multi Frequency) is required, for example, for querying and
controlling certain network mailboxes via digit codes, for controlling of automatic directory
enquiries or for remote operation of the local answering machine.
To send DTMF signals via VoIP, you must define how key codes should be converted into and sent
as DTMF signals: as audible information via the speech channel or as a "SIP Info" message.
Ask your VoIP provider which type of DTMF transmission it supports.
Automatic negotiation of DTMF transmission
For each call, the phone attempts to set the appropriate DTMF signalling type for the codec
currently being negotiated: select Yes.
The system will use the transmission method matching best the received capabilities from
the peer based on the following priority order:
•
send via RFC2833, if the PT (Payload Type) for the telephone event is provided by the peer
•
send via SIP INFO application/dtmf-relay, if SIP INFO method is supported by the peer
•
send in-band audio
No automatic attempts to set DTMF transmission type: select No (DTMF transmission type is
Audio by default).
Send settings of DTMF transmission
Make the required settings for sending DTMF signals:
Audio or RFC 2833
SIP Info
Connection ringtones
Not available when the device is in All in one + internal telephony - dynamic IP
mode.
Different ringtones are possible for internal, external, group, door, emergency and optional calls.
Prerequisite: The provider/platform sends the correct information via the Alert-Info field in the
SIP header.
The user can select different ringtones for specific calls at the handset. You can here define which
different ringtones are allowed to be set by the user.
In the Name field enter the name for the menu entry that should be shown in the handset
menu.
Note: Internal calls cannot be changed.
The Alert-Info pattern field contains the Info-Alert definition that must be contained in the
SIP header to identify the appropriate call type.
Field is empty: The entry is not shown in the handset menu.
DTMF signals are to be transmitted acoustically (in voice packets).
DTMF signals are to be transmitted as code.
Provider and PBX profiles
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