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SRP9180 - Trunked Portable Radio User Guide
NUMBERING CONVENTIONS
DESCRIPTION
Alert tones
The transceiver emits these tones to indicate an invalid operator or error.
Indicator
When displayed next to a Function, indicates that the Function is active.
Chevron
Same as Indicator
Cradle
The bracket that holds the microphone when it is not in use.
Dial string
A complete string that defines a call type and call address.
Fleet
A number of radios. Normally all radios owned by a user form a leet. A fleet is
subdivided into groups.
Group
A number of radios with the same group identity, normally organised
into functionally related groups.
Identity
The unique number of a trunking radio. This is fully specified as
PREFIX/FLEET/UNIT NO.
MPT1327
Refers to the UK Ministry for Post and Telecommunications specification defining
the low level protocol for public trunking systems.
MPT1343
MPT1343 Refers to the UK Ministry for Post and Telecommunications specifica-
tion defining the User Interface for radios operating on MPT1327 public trunking
systems.
Network
The trunking infrastructure and all its interconnections.
POACSU
Partial Off Air Call Set Up. The system checks to see if the unit being called is in
radio contact, before allocating a traffic channel for the call. No check is made to
see if you can/want to accept the call (see POACSU).
Prefix
A larger division of mobile identities that is subdivided into FLEETS.
PSTN
Public Switched Telephone Network — the telephone system
PTT
Press-to-Talk. Hold down the Press-to-talk switch on the
microphone for the duration of the transmission.
Service.
The radio has established communications with the trunking structure.
Status Number
The code that transmits the status of the mobile to the controller automatically
Appendix C - Glossary
A summary of common radio terms and some other terms used in this document, and their meanings, are given below.