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made in the clear mode by pressing the C/S 
(Clear/Secure) option switch (if encryption is 
selectable on the channel). Otherwise, the correct 
key must be loaded. 

4. When the call is finished or is not answered, end it 

by pressing the CALL option switch and placing the 
microphone back on-hook.

6.5.3  PLACING A STANDARD PRIVATE CON-

VERSATION CALL

1. Momentarily press the CALL (Private Call) option 

switch. The tag (alias) of the last called mobile is 
displayed.

2. To select another mobile, rotate the Select switch 

until the tag for the desired mobile is displayed. 

3. Press the PTT switch and one of the following 

events then occurs:

•

The called party answers the call.

•

The called party does not answer. Press the CALL 
option switch to end the call.

•

If the selected mobile ID is not valid, “INVALID 
ID” is displayed and an alert tone sounds.

•

If the radio system is busy, four low tones sound 
and “BUSY” is displayed. When the system is no 
longer busy, the call back tone (four beeps) is 
heard and the channel is automatically acquired. 
Press the PTT switch to continue the call.

•

If the call is in the secure mode and your radio 
does not have the proper encryption key, 
“KEYFAIL” is displayed and the call must be 
made in the clear mode by pressing the C/S 
(Clear/Secure) option switch (if encryption is 
selectable on the channel). Otherwise, the correct 
key must be loaded.

4. When the call is finished or if it is not answered, end 

it by pressing the CALL option switch and placing 
the microphone on-hook.

6.5.4  RECEIVING A PRIVATE CALL (ALL 

TYPES)

1. When a private call or unit call is received, “CALL 

RCVD” is displayed and the call tone sounds once. 

2. To answer the call, press the CALL (Private/Unit 

Call) option switch and then the PTT switch and 
begin speaking. The unit ID of the calling mobile is 
displayed. More information follows:

•

If the PTT switch is pressed before the CALL 
switch, the call is transmitted as a group call.

•

If private calls are not permitted (CALL switch not 
programmed) press the RESP (Call Response) 
option switch to respond.

•

The call must be answered within 20 seconds or it 
is automatically terminated.

•

If the system is busy when a response is made, 
“BUSY” is displayed and the busy tone sounds.

6.6.1  GENERAL

The telephone call feature* allows telephone calls 

to be placed and received over the public telephone 
system using your radio. The type of call (secure/
clear) is determined by the mode selected by the C/S 
(Clear/Secure) option switch. Telephone calling is 
programmed to operate in one of the following modes:

•

Disabled (telephone calls not available)

•

Answer-only capability

•

List Only - Telephone numbers can be selected 
from a preprogrammed list only (direct dialing 
using a keypad is not allowed)

•

Unlimited - With the Handheld Control Unit 
(HHC) only, phone numbers can be selected from 
a list and also entered directly using the keypad 
(future availability).

* This feature requires 5300 firmware 1.20.0/2.0/3.0 or 
later.