Tait International Limited TPDHBB User Manual
Glossary 159
15 Glossary
A
APCO
The Association of Public Safety
Communications Officials.
Communications Officials.
The APCO Project 25 standards
committee (
committee (
)
defined a digital radio standard. The
standard is often referred to as ‘APCO’
or ‘P25’.
standard is often referred to as ‘APCO’
or ‘P25’.
C
channel
In a conventional system, a channel is a
pair of frequencies used to transmit and
receive radio signals.
pair of frequencies used to transmit and
receive radio signals.
In a P25 trunking system, a channel is a
group of radio users.
group of radio users.
control
channel
channel
In a P25 trunking system, the control
channel is used by the trunking site to let
the radio units in the site’s coverage
area know when they can transmit their
call information.
channel is used by the trunking site to let
the radio units in the site’s coverage
area know when they can transmit their
call information.
conventional
operation
operation
In conventional operation, the radio is
tuned to a programmed channel, and
communicates with other radios either
on that channel, or through a repeater
system.
tuned to a programmed channel, and
communicates with other radios either
on that channel, or through a repeater
system.