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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. 

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

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.