Motorola GP-388R Manual page 39

To initiate a DTMF call with Manually
Dialled Telephone Interconnect Call
1 Enter the interconnect call from the
keypad, you will hear a tone sequence.
Display shows
e.g.
2 Press dedicated Call Button (PTT or Call
1-4)
Display icon lit:
3 Wait for call to be set up when you will
hear a dial tone.
Display shows:
4 Enter desired phone number, taking care
not to press the PTT.
Note: Each DTMF digit is transmitted
instantly.
Display shows
entered digits:
English 36
D
5 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.
6 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.
Note: The radio starts a programmable timer the
moment both parties stop transmitting
(talking). If the time-out timer expires, the
radio will end the phone call.