Using DTMF Signals as Post Dialable Digits
Post dialable digits are transmitted with DTMF after the dialed number itself, as soon as a connection is established. You can use this to control certain scripting commands with DTMF. You can also configure a post dialable digits on a speed dial.
Syntax
Post dialable digits are separated from the dialed number by an "x". In addition, you can use a comma to set a pause of two seconds. To insert a longer pause, you can add several successive commas.
Example
1234x567,,89
This string dials the number "1234". When the call is accepted, the numbers "567" are transmitted with DTMF. After a pause of four seconds "89" is transmitted.