Operating instructions

SRM9030 ~ Mobile Trunk Radio User Guide
TNM-U-E-0004
Page 31 © Simoco Europe 2001
Appendix C - Glossary
A summary of common radio terms and some other terms used in this
document, and their meanings, are given below.
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.
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 fleet. A fleet is subdivided into groups.
FOACSU
Full Off Air Call Set Up. You must accept the call before the
system allocates a traffic channel for the call (see also
POACSU).
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.
MIC
Abbreviation for microphone.
MPT1327
Refers to the UK Ministry for Post and Telecommunications
specification defining the low level protocol for public trunking
systems.
MPT1343
Refers to the UK Ministry for Post and Telecommunications
specification 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
The code that transmits the status of the mobile to the
Number
controller automatically.