E F Johnson Company 2425M80 Benutzerhandbuch

Draft 02 - Sep 1 2015

6-4

Unit calls allow calls to be placed to a specific radio. Either the Enhanced or standard 
modes may be programmed depending on the capabilities of the radio system. One 
difference between these call types is that the Enhanced type provides an indication that 
the called mobile is not on the air and the standard version does not. Operation in each of 
these modes is described in the following information.

The Unit Call option switch is required to place these calls, and either that switch or the 
Call Response switch is required to answer them. The feature is also selectable via menu 
parameter or soft button (Lightning Control Head only). Unit calls are programmed to 
operate in one of the following modes:

• Disabled

• Answer-only capability

• List only - Unit IDs can be selected from a preprogrammed list only (direct entry as 

follows is not allowed)

• Unlimited - Unit IDs can be selected from a list and also dialed directly using the front 

panel controls or keypad on the Digital Keypad Mic.

To recall from a list:

1 Momentarily press the Unit Call option switch, soft button (Lightning Control Head 

only), or select the menu parameter. The alias of the last called mobile is displayed.

2 To select another mobile, rotate the Select switch until the alias for the desired mobile 

is displayed. 

3 Press the PTT switch and one of the following events then occurs:

To make direct entry from the Menu (scroll down to select direct entry) or by using front 
panel controls or the keypad on the Digital Keypad microphone:

1 Press and hold the Unit Call option key until a tone sounds (approximately one second). 

The last ID called is displayed.

2 If using the front panel controls, enter the ID of the radio you are calling (eight digits 

for Unit Call) by rotating the select switch, pressing F3 to advance the cursor (Standard 
Control Head) or right on the Navigation pad (Lightning Control Head). The F2 button 
(Standard Control Head) or left on the Navigation Pad (Lightning Control Head) can be 
used to move the cursor left to correct an entered number. With the Digital Keypad