Parameter set-up:
Mode: select DTMF mode among five options: “Inband”,
“RFC2833”, “Info+Inband” and “Info+RFC2833” based on the
specific DTMF transmission type of the third party device to be
matched with as the party for receiving signal data.
How to Notify DTMF:select among four types: “Disable” “ DTMF”
“DTMF-Relay” “Telephone-Event” according to the specific type
adopted by the third party device. You are required to set it up
only when the third party device to be matched with adopts “Info”
mode.
Payload: set the payload according the the specific data
transmission payload agreed on between the sender and receiver
during the data transmission.