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An overview of the SMARTNET/SmartZone and 

P25 trunked operating modes is located in Section 3.7. 
The following information describes the features 
unique to these modes of operation. Refer to the 
“Radio Wide Features” section starting on page 17 for 
information on features common to all operating 
modes.

Either analog or digital operation can be selected 

for communication on SMARTNET traffic channels. 
Each talk group can be programmed for either type of 
operation. Digital operation may be an optional 
feature.

When power is turned on with a SMARTNET/

SmartZone channel selected, the five-digit Unit ID 
from 1-65,535 is briefly displayed as IDxxxxx. When 
a P25 channel selected, the eight-digit unit ID from 
1-16,777,216 is displayed (see Section 5.15.1).

6.4.1  INTRODUCTION

Standard calls are between you and another 

mobile, group of mobiles, or a control station (a radio 
in a fixed location). Most calls are probably this type. 
Proceed as follows to place and receive group calls: 

6.4.2  PLACING A STANDARD GROUP CALL

1. Turn power on and set the volume as described in 

Section 3.1. Select the channel programmed for the 
talk group you want to call (see Section 3.4.2). 

2. If the talk group is programmed for encryption and 

is not strapped to Clear or Coded, select the desired 
mode by pressing the C/S (Clear/Secure) option 
switch. The status of that switch is ignored if the talk 
group is strapped to Clear or Coded. Refer to 
Section 11.3 for more information.

3. Press the PTT switch and begin talking. An optional 

talk permit tone may sound to indicate when talking 
can begin. Other indications that may occur are as 
follows:

•

If in the secure mode and your radio is not 
programmed with the proper encryption key, 
“KEYFAIL” is displayed and the call must be 
made in the clear mode or the proper key must be 
programmed.

•

If the busy tone sounds and “BUSY” is displayed, 
the system is busy. Release the PTT switch and 
wait for the call back tone to sound. Then press the 
PTT switch within 3 seconds.

•

If a continuous tone sounds and “NO SYS” is 
displayed, you may be out-of-range. Drive closer 
or away from shielding objects and try again.

•

If your unit ID is invalid, the call is being made to 
an invalid group ID, or group calls are not enabled, 
“DISABLED ID” is displayed and an alert tone 
sounds.

•

If an attempt is made to change an analog channel 
from the clear to the secure mode and there is no 
available secure channel, “NO SEC” is flashed, an 
error tone sounds, and the call is terminated.

•

If an attempt is made to change an analog channel 
from the secure to clear mode, “SEC ONLY” is 
displayed, an error tone sounds, and the call is 
terminated. (Calls on digital channels can be 
changed if they are not strapped to clear or secure).

•

If the Secure mode is selected by the C/S (Clear/
Secure) option switch and an attempt is made to 
transmit on a channel strapped as Clear, “Clear 
Only” is displayed and the transmitter is disabled. 
Likewise, if the Clear mode is selected and the 
channel is strapped as secure, “Secure Only” is 
displayed and the transmitter is disabled.

6.4.3  RECEIVING A STANDARD GROUP CALL

Calls are received on only the talk group and/or 

announcement group programmed for the selected