RADIO CALLS
DTMF
(Keypad Microphone only)
DTMF means Dual Tone Multi Frequency and is used when the radio is required to operate in a radio system with an interface to telephone systems. There are two methods of accessing DTMF Live Dial Mode, either Automatic or Manual:
Automatic method
To do this, your radio must send a telephone interconnect to a station that connects you to a phone line. After you have finished your call, the radio sends a clear down call (if programmed) to shutdown the connection to the phone line.
Sending the Telephone Interconnect Call
Your radio can be programmed to send the interconnect call in one of the following ways:
•automatically - when a call button
(Call 1 - 4 or PTT) has been programmed with the interconnect call, or a contact list entry has been programmed for DTMF access.
•manually - when you dial the code using the keypad microphone.
If in doubt, please contact your dealer or network manager for further information.
To initiate a DTMF call with Automatic Telephone Interconnect Call
1Press dedicated Call Button (Call
Display icon lit: | D |
2Wait for call to be set up when you will hear a dial tone.
Display shows: | ENTER |
3Enter desired phone number on the keypad microphone, taking care not to press the PTT. Note: Each DTMF digit is transmitted instantly.
Display shows | 8116 |
entered digits: |
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4Once the radio has connected to the called number, you can begin the conversation. Even though this is a phone call, your conversation mimics a radio call, that means that both
parties speak in turn, i.e. press the PTT to talk, release to listen.
5To end the call press the Monitor Button or change channel when the clear down call is sent automatically from your radio to shutdown the phone line.
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