Operator's Manual

19
Sending DTMF With The DTMF Microphone
The optional DTMF microphone allows the radio to send DTMF signaling.
DTMF may be used in a radio system to access a telephone line or to
perform system control functions.
1. Select a channel. DTMF must be enabled on the channel.
2. Ensure there is no activity on the channel by:
• checking the TX/RX LED.
• pressing and holding the Monitor/Clear button. Squelch noise
will be heard if the channel is clear of traffic.
3. Remove the microphone from the hookswitch.
4. "Dial" the required DTMF digits from the telephone keypad on the
microphone. Do not hold the PTT button on the microphone down
while dialing. The DTMF microphone will automatically key the
transmitter.
5. Use the PTT button to transmit voice using the DTMF microphone.