DUAL TONE MULTI-FREQUENCY (DTMF)

The keys on the microphone keypad function as DTMF keys; the 12 keys found on a push-button telephone plus 4 additional keys (A, B,
C, D). This transceiver provides 10 dedicated memory channels. You can store a DTMF code with up to 16 digits.
Some repeaters in the U.S.A. and Canada offer a service called Autopatch. You can access the public telephone network via such a
repeater by sending DTMF tones. For further information, consult your local repeater reference.

MANUAL DIALING

Manual Dialing requires only two steps to send DTMF tones.
1 Press and hold the microphone [PTT].
2 Press the keys in sequence on the keypad to send DTMF
tones.
• The corresponding DTMF tones are transmitted.
• If the DTMF Hold function is activated, you need not hold down
[PTT] while pressing keys. After transmitting the fi rst tone (by
pressing [PTT] and the fi rst key), pressing additional keys will
keep the transceiver in transmit mode for 2 seconds.
Frequency (Hz)
1209 1336 1447 1633
697 [1] [2] [3] [A]
770 [4] [5] [6] [B]
852 [7] [8] [9] [C]
941 [][0] [#] [D]

■ DTMF Hold

Activate this function to remain in transmit mode, after
beginning to press keys when making a call.
1 Enter Menu mode and access Menu 300.
2 Set DTMF Hold to ON to continue transmitting when
pressing keys.
• Set this menu to OFF to stop the 2 second continuous
transmission.

AUTOMATIC DIALER

There are 10 dedicated DTMF Memory channels available
to store DTMF codes. You can store up to 16 digits in each
channel.

■ Storing a DTMF Code in Memory

1 Enter Menu mode and access Menu 301.
2 Rotate the Tuning control to select a channel number.
3 Press the Tuning control to set the selected channel
number.
• The name entry display appears.
4 Enter a name for the channel, the press the Tuning
control to set it.
• The code entry display appears.
5 Enter a DTMF code for the channel, then press the
Tuning control to set it.
• When a space is entered, it becomes a “Pause” code.

DTMF-1