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programmed. Only the individual ID of the target radio
is sent (a talk group ID is not sent). The radios that can
be called are preprogrammed 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 radio
must be programmed with the Unit ID option switch
or menu parameter, and have a Unit Call programmed
for the ID of the calling radio.
Place and receive a Unit Call as follows:
1. To transmit a Unit Call, press the Unit Call option
switch or select the Unit Call menu parameter. The
alias (tag) of the last Unit Call is displayed.
2. If required, press the Up/Down switch to display the
desired call. The alias and ID of the 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 radio 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 Call is received, two beeps sound (if
tones are enabled), and "Call Rcvd" and the alias of
the unit ID are alternately flashed.
5. To respond, select the Unit Call mode by pressing
the Unit Call option switch or selecting the menu
parameter. The following operation then occurs:
•
If a unit call has been programmed with the ID of
the calling radio, 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 radio, a response cannot be made in
this 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.
CONVENTIONAL MODE FEATURES
5.17.6 P25 CONVENTIONAL TELEPHONE
CALLS
General
Telephone calls can be placed and received on
P25 conventional channels. This feature allows tele-
phone calls to be placed and received over the public
telephone system using your radio. Telephone calls are
programmed to operate in one of the following modes:
•
Disabled
•
Answer-only capability
•
List only - Telephone numbers can be selected
from a preprogrammed list only (direct entry
using the keypad is not allowed)
•
Unlimited - Telephone numbers can be selected
from a list and also dialed directly entered using
the keypad.
Both limited and DTMF keypad models can place
telephone calls by recalling the telephone number
from a preprogrammed list as just described. However,
only DTMF keypad models can directly dial telephone
numbers using the keypad.
Access/De-Access Codes
P25 conventional telephone calls utilize an access
to access the system when placing a telephone call,
and a de-access code to terminate the call when it is
finished. These codes are preprogrammed in pairs by
the Access/De-Access Code list selected on the
conventional Per System screen, and up to 16 pair can
be programmed. Each conventional P25 channel can
be programmed to automatically select one of these
code pairs. They must match the system codes, and the
default code is *1P(pause)#.
Placing a Telephone Call
Recalling From List
1. Select the conventional channel that is programmed
to select the desired access and de-access codes.
2. Momentarily press the Phone option key or select
the Phone > Num List menu parameter. The display
indicates the last number dialed by alternately
displaying "Last Num" and the telephone number.
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