User Guide

32
English
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
1 Press dedicated Call Button (Call 1-4 or PTT),
you will hear a tone sequence.
Display icon lit: D
2 Wait for call to be set up when you will hear a
dial tone.
Display shows:
3 Enter desired phone number on the keypad
microphone, taking care not to press the PTT.
Note: Each DTMF digit is transmitted
instantly.
Display shows
entered digits:
4 Once 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.
5 To 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.
ENTER
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