The zone to which a radio is currently affiliated.
The process in which a subscriber unit signals to the system which talkgroup or site it is currently associated with.
The talkgroup to which a radio is currently affiliated.
An alphanumeric name used to identify a radio, talkgroup, site, etc. rather than using the assigned six-digit ID number.
A collection of two or more talkgroups. Also called a multigroup.
Announcement Group call
A group call involving two or more talkgroups. Also called a multigroup call.
Announcement Group ID
Unique identifier assigned to each announcement group in a Motorola trunking system.
Association of Public Safety Communications Officers. A national organization of communications professionals that supports and promotes public safety communications concerns.
A method of queuing a call when resources are not available to grant the call.
Equipment at a master site or remote site that controls a set of base stations or repeaters. A central controller is typically a computer that processes inbound and outbound data traffic, assigns repeaters for voice channel access, and generally monitors and maintains order in the system.
A GUI-based operator position that allows the console operators to interact with the system and communicate with radio users.
Communication channel implemented by a base station or repeater used to transmit and receive channel assignment data or process other control commands from the system. Contrast with a base station or repeater functioning as a voice channel used to transmit and receive voice information.
A subaudible, 163.64 Hz tone generated by a radio when dekeying. The controller uses this tone to start the timeout timer in message trunking. In transmission trunking, receipt of the Disconnect Tone causes an immediate release of the voice channel by the controller.
The highest priority service of talkgroup call. When the emergency button of a subscriber unit is pressed and the PTT pressed, an Emergency Call is granted.
A collection of two or more talkgroups.
A group call involving two or more talkgroups.
A site that consists of repeaters and a site controller, which are linked to a Master Site.
Station at a master site or remote site that broadcasts and receives RF signals to and from mobile and portable radios in the field.
A wide-area trunked system configuration that uses multiple transmitter and receiver sites to extend coverage of the system. All the corresponding channel numbers at all the sites uses the same frequency.
A software-based, ver