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Talkgroup A group of users in a Type II or Type IIi system.
Talk Permit Tone A brief series of beeps that provides radio operators with an indication
that a voice channel is available for use and is assigned to them.
Talk Prohibit Tone An audible tone (honk) heard from the radio's speaker when PTT is
pressed. The tone will be heard when the radio is out of range of the
system or it is programmed with the incorrect system information.
Time-Out Timer (TOT) A function that limits the transmission period to a pre-defined time.
The radio will automatically stop transmitting when the timer goes off
after the pre-defined time and will generate an alert tone to notify the
user that no transmission is taking place.
Transmission Trunking Upon releasing the PTT, the radio will return to monitor the Control
Channel if the user desires to initiate another call.
Trunking The automatic sharing of communications paths between a large
number of users.
Type I A type of Trunking that is composed of Fleets and Subfleets and is
limited by the size of codes of those groups. A Type I system
handshaking includes sending of the Acknowledge Tone and High
Speed Handshake.
Type II A type of Trunking system that is composed of Announcement Groups
and Talkgroups. A Type II system is limited on talkgroups and
individual ID combinations to 48,000 IDs and 4,000 talkgroups per
system. The Type II system handshaking does not include sending
Acknowledge tone and High Speed Handshake.
Type IIi A type of Trunking system composed of Fleets, Subfleets and
Talkgroups. This Trunking type supports both Type I and Type II
Handshaking. This Trunking type also allows Type I radios to
communicate with Type II radios on the same voice channel.
Unit ID The electronic tuning/alignment information of a particular radio.
Universal ID A particular personality in a radio unit which is chosen as the one
whose Trunking identity will always be used to address this unit. In
this manner, a unit would respond to an individual call (Private Call,
Call Alert, Phone Interconnect, etc.) regardless of the current
personality chosen.
User Scan Scan type which is programmable through the front panel buttons on
the radio.
Voice Channel A Trunked repeater that is used to transmit and receive data and voice
from the radios on the system.
Wide Area Call A call in a wide area coverage system which utilizes a voice channel in
all sites of the system.
Zone A collection of channels which have something in common.
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