E F Johnson Company 2425M80 Benutzerhandbuch

Draft 02 - Sep 1 2015

6-3

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 three seconds.

- If a continuous tone sounds and “OUT OF RANGE” is displayed, you may be out of 

range of the site or blocked from it by radio-shielding structures or objects. Drive 
away from shielding structures or objects and try again. If this does not work, drive 
closer to the site.

- If your unit ID is denied, the call is being made to an invalid group ID, or group calls 

are not enabled, “Denied” is displayed and an alert tone sounds.

- If an attempt is made to change a channel from the clear to the secure mode and there 

is no available secure channel, “CLEAR ONLY” is flashed, an error tone sounds, and 
the call is terminated. (SmartNet Only)

- If the Secure mode is selected by the Clear/Secure option switch, soft button 

(Lightning Control Head only) or menu parameter 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, “SECR ONLY” (Standard Control Head) or “Secure Only” (Lightning 
Control Head) is displayed and the transmitter is disabled.

Calls are received on only the talkgroup and/or announcement group programmed for the 
selected channel (with scanning disabled). 

When a group call is received, the alias of the selected channel is displayed. The radio can 
be programmed so that the following are also displayed for 0.5-7.0 seconds or 
continuously during the call.

PTT ID - The unit ID of the mobile placing the call is displayed.

TG on Rx - The alias of the talkgroup on which the call is being received is displayed 
(typically for use by technicians).

User Group ID - If the group ID of the call being received is included in a 
preprogrammed User Group ID list, the alias programmed in that list for that group is 
displayed.

Receive Key ID - The Key ID (or the alias, if programmed) of the key used to decode 
the call is displayed.