To send DTMF tones
If you need to send long DTMF strings, it is more convenient to send them via
the communicator interface, see ”Multiple calls” on page 50.
To send DTMF tones manually
1 Make a call to the desired phone number.
2 Key in the digits you want to send as DTMF tones. The digits are sent one
by one to the network. DTMF tones can be transmitted even when the
phone key click is set off.