User's Manual

CONVENTIONAL FEATURES
25
Revised August 2002
Part No. 001-5300-007CD-NR
4.13.4 CHANGING TALK GROUP ASSIGNED TO
A CHANNEL
Group calls are placed by simply selecting the
channel programmed for the desired group, monitoring
the channel if required, and transmitting. If the
TG
SEL
option switch is programmed, the talk group
assigned to a channel can be changed by the user. The
new talk group continues to be assigned to the channel
even after radio power is cycled or another channel is
selected. To change a channel talk group, proceed as
follows:
1. Select the channel to be changed and then press the
TG SEL option switch.
2. Rotate the Select switch to display the talk group to
be assigned to that channel. Talk groups are indi-
cated by a unique identification in the alphanumeric
display.
3. To select that talk group and return to normal oper-
ation, press the
TG SEL switch again or press the
Select switch. If talk group selection has been
disabled on the channel by programming, the talk
group does not change, “NO LIST” is displayed,
and a tone sounds.
4.13.5 UNIT (INDIVIDUAL) CALLS
Unit calls (also called Individual Calls) can be
placed to a specific radio on Project 25 channels If the
CALL option switch is programmed. Only the indi-
vidual ID of the target radio is sent (a talk group ID is
not sent). The mobiles that can be called are prepro-
grammed in the unit call list.
To receive a unit call, the RF channel of the call
must be selected or scanned and the correct NAC and
unit ID must be detected. The ID of the calling radio is
then transmitted back. To respond to the call, the trans-
ceiver must be programmed with the unit ID option
switch, and have a Unit Call programmed with the ID
of the calling mobile.
Place and receive a Unit Call as follows:
1. To transmit a unit call, press the CALL option key.
The alias (tag) of the last Unit Call is displayed.
2. If required, rotate the Select switch to display the
desired call. The alias and ID of the unit calls that
have been programmed are alternately displayed.
3. Press and then release the PTT switch. Ringing is
then heard and “WAIT” displayed to indicate that
the mobile is being rung. To disable this ringing but
not the call, briefly press the PTT switch again.
Ringing occurs for 20 seconds or until the call is
answered, whichever occurs first.
4. When a unit ID call is received, two beeps sound (if
tones are enabled), and “Call Rcvd” and the alias or
frequency of the currently selected talk group are
alternately flashed.
The transceiver may also be programmed to display
the alias of the channel on which the call is being
received (if it is not the same as the selected
channel) and/or the ID of the mobile placing the
call.
5. To respond, select the Unit Call mode by pressing
the CALL option key. The following operation then
occurs:
• If a unit call has been programmed with the ID of
the calling mobile, it is automatically selected. A
response can then be made without changing the
selected channel.
• If no Unit Call has been programmed with the ID
of the calling mobile, a response may have to be
made in the standard mode.
If the call timer times out (set by programming)
or the channel is changed before a response is made,
the unit call mode is exited.
4.14 KEYPAD PROGRAMMING
NOTE: The Keypad programming feature is available
to Federal Government users only. Users regulated by
the Federal Communications Commission are not
allowed to have this feature.
Introduction
Keypad programming is available on Federal
radios if the PROG option key is programmed. It is