Payload: select the payload type (ranging from 90-118) to
configure the audio codec payload. The pay load between the door
phone and the corresponding intercom device should be identical.
The default payload is 104.
9.5.
Configure DTMF Data Transmission
In order to achieve the door access via DTMF code or some other
applications, you are required to properly configure DTMF in order to
establish a DTMF-based data transmission between the door phone
and other intercom device for the third party integration.
To configure the DTMF data transmission, you can do as follows:
1. Click Account > Advanced > DTMF
2. Set up parameters properly according to your need.
3. Press Submit tab fore the validation or Cancel tab for the
Cancellation.