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DTMF mode calls
This feature is available for radios with an alphanumeric keypad
only.
DTMF (dual tone multiple frequency) is the tone-based system
used in the world’s telephone networks. If your system has access
to the public switched telephone network or other networks that
make use of DTMF tones, your radio can make a call to a
telephone or send control codes to a remote device.
If you simply wish to call a PABX or PSTN number, follow the
instructions for making such calls in "PABX and PSTN calls" on
page 69. If, however, once you have set up such a call you wish to
send control codes, use DTMF mode.
Dialing control codes
This feature is only available for radios with an alphanumeric
keypad.
DTMF numbers can use numbers 0 to 9, letters A to D, and the
and keys.
Entering tones A to D
To dial tones A to D, your radio must be programmed so that you
can use the PTT key as a ‘shift’ key in conjunction with the
numeric keys as follows:
■ PTT + = A
■ PTT + = B
■ PTT + = C
■ PTT + = D
To enter the tone A, for example:
■ Press and hold the PTT key, then press the on the
keypad.
Entering a pause
To enter a pause:
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