User`s guide

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Auto-Affiliation The ability of radios in a Type II or Type IIi Trunking system to
automatically transmit their talkgroup and unit ID information to the
Central Controller. Affiliation occurs after the radio has locked on to
the control channel frequency. It does not require that the user of the
radio press PTT.
Automatic Multiple Site Select See “AMSS”.
Automatic Retry The ability of a Portable radio to send up to 16 in-bound signalling
words in a four-second period provided that the out-bound signalling
word is not received from the Central Controller after the radio has
made a request to transmit.
BCL See “Busy Channel Lockout”.
bps Bits per second. Unit of measurement representing bit rate (the
number of binary bits transmitted per unit time).
BSI See “Base Station Identifier”.
Back-up File A duplicate or copy of an archive file that can be used in the event that
the original archive file is lost, damaged or erased accidentally.
Base Station Identifier (BSI) An identifier which is programmed into the Central Controller and
sent out in Morse code ID on the lowest frequency Trunked repeater.
Blank Frequency A channel that is not assigned a transmit frequency.
Blank PL Code A channel that is not assigned a receive or transmit PL code.
Busy Channel Lockout (BCL) A feature on Conventional modes that gives “listening privacy”. The
radio will not key when there is a carrier on a channel unless it is the
user’s PL/DPL group. Instead, the user will hear a busy tone while PTT
is pressed. In addition, the user will not be allowed to monitor the
channel. If all the users who share the channel have BCL enabled on
their radios, they will have privacy similar to that provided by a
Trunked radio system.
Busy Override A feature that allows messages to get through to critical users (or users
at critical sites) even when some sites may have busy channels. Those
at available sites are also included in the communication. Others join
the conversation as frequencies at their sites become available.
CA See “Call Alert”.
CAI Digital Operation A radio that is equipped with CAI (Common Air Interface) Digital
Operation uses the IMBE (Improved Multi-Band Excitation) digital
signalling protocol to encode and decode digital signals.
CSQ See “Carrier Squelch”.
Calibration A means of teaching the radio to adjust itself for optimum
performance.
Call Alert (CA) A Stat-Alert or RapidCall signalling feature that acts as a paging system
within the radio’s communication network. A Call Alert is sent with a
series of audible signals and/or a flashing display (depending on the
radio product and model) to notify an individual radio or an entire