I Call Procedure; I Receiving And Transmitting - Icom IC-F1721 Instruction Manual

I Call procedure

When your system employs tone signaling (excluding CTCSS
and DTCS), the call procedure may be necessary prior to voice
transmission. The tone signalling employed may be a selec-
tive calling system which allows you to call specific station(s)
only and prevent unwanted stations from contacting you.
q Select the desired TX code channel, 2/5-tone code,
Individual ID code* or Talkgroup ID code* according to
your System Operator's instructions.
• This may not be necessary depending on programming.
• Refer to pgs. 10–12 for selection.
*Digital mode operation only.
w Push the call key (assigned to one of the dealer program-
mable keys; except for the Digital mode operation) or [PTT].
e After transmitting, the remainder of your communication
can be carried out in the normal fashion.
Selective calling Non-selective calling

I Receiving and transmitting

Receiving:
q Push [
] to turn the power ON.
w Push [CH Up] or [CH Down], or rotate [CH Up/Down] to
select a channel, in sequence.
e When receiving a call, adjust the audio output level to a
comfortable listening level.
Transmitting:
Wait for the channel to become clear to avoid interference.
q Take the microphone off hook.
• 2-tone, 5-tone mute may be released. (The 'audible' condition is
selected and BUSY indicator lights green.)
• A priority channel may be selected automatically.
w Wait for the channel to become clear.
• The channel is busy when BUSY indicator lights green.
e Push [CALL] when initiating a call from your side.
• Coded audio may be heard from the transceiver, then "
appears.
• This operation may not be necessary depending on your signal-
ing system. Ask your dealer for details.
r While pushing and holding [PTT], speak into the micro-
phone at your normal voice level.
t Release [PTT] to receive.
IMPORTANT: To maximize the readability of your signal;
1. Pause briefly after pushing [PTT].
2. Hold the microphone 5 to 10 cm (2 to 4 inches) from
your mouth, then speak into the microphone at a normal
voice level.
2
BASIC OPERATION
2
"
9