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Viking™ VP600 Portable Radio Operating Manual

6-3

Calls are received on only the talkgroup and/or announcement group programmed for the 
selected channel (with scanning disabled). When the selected channel is programmed with 
Talk or Announcement groups, only the Talk or Announcement group IDs is detected. 
Other IDs in the Announcement group are detected only if no talkgroup is programmed.

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 to 7.0 seconds or 
continuously during the call.

PTT ID- The unit ID of the radio 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 pre 
programmed 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.

Unit calls allow calls to be placed to a specific radio unit. 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 radio 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 button is required to place these calls, and either that key or the Call 
Response option button is required to receive them. Unit calls are programmed to operate 
in one of the following modes:

• Disabled.

• Response-only capability.

• List only - Unit IDs can be selected from a pre-programmed list only (direct entry using 

the keypad is not allowed).

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

keypad.