150 P25 Glossary TB9100/P25 CG/P25 TAG Installation and Operation Manual
© Tait Limited March 2014
ARP
ARP (Address Resolution Protocol) is a IP protocol used to map IP network
addresses to the hardware addresses used by a data link protocol.
B
Base station
A radio receiver and transmitter that is located in a specific place (at a site) that
enables a two-way radio to communicate with a dispatcher or over a larger
range with other two-way radios. Specifically, Tait TB9100 equipment in a
subrack.
Battery protection
mode
A PMU enters battery protection mode when it has AC power but its DC
power is below the configured power shutdown voltage. In battery protection
mode, the PMU will shut down to protect the battery if it loses AC power.
BCD
BCD (binary coded decimal) is a code in which a string of four binary digits
represents a decimal number.
bearer network
Telecom equipment that is used to carry user data.
BER
Bit Error Rate. A measure of the quality of digital transmission, expressed as a
percentage. The BER indicates the proportion of errors to correctly received
digits in a received signal.
C
C4FM
Compatible Four-level Frequency Modulation. A modulation scheme defined
in the P25 CAI standard for 12.5 kHz bandwidth.
CAI
Common Air Interface. The over-the-air data formats and protocols defined by
the APCO P25 committee.
Calibration
Software
The TB9100 Calibration Software is a utility for defining the switching ranges
of the receiver and the exciter and for flattening the receiver response across its
switching range. It can also be used to calibrate TB9100 modules.
call
A complete exchange of information between two or more parties. A call
requires a receive signal path and a transmit signal path. In trunked systems, a
call may be a conversation, made up of a number of overs, but in conventional
systems, a call is an over.
calling profile
A group of configuration settings that defines the properties of the TB9100
analog line, which can be regarded as equivalent to a SU on the network.
central voting
Voting that is centralized at one member of the channel group.
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