Codan Radio P25 Training Guide - Manual (Page 111)

P25 RADIO SYSTEMS | TRAINING GUIDE
Chapter 9: P25 Glossary of Terms Page 103
Et Interface
The label given to the Telephone
Interconnect Interface in the General
System Model.
EVM
Error Vector Magnitude
ETSI
Abbreviation for “European
Telecommunications Standards
Institute.”
FCC
Abbreviation for “Federal
Communications Commission”
FDMA (Frequency Division Multiple Access)
Access method that divides a
communication channel into two or more
individual channels.
FEC
Abbreviation for “Forward Error
Correction”
FIFO
A service discipline of queuing systems,
based on the First In, First Out rule.
FIPS
Abbreviation for “Federal Information
Processing Standard.”
Firmware
Software that is permanently stored in a
hardware device which allows reading
and executing the software, but not
writing or modifying the software.
Flow Control
In data communications systems, a
device function that controls the rate at
which data may be transmitted from one
terminal so that it is equal to the rate
at which it can be received by another
terminal.
FNE
Abbreviation for “Fixed Network
Equipment.”
Format
In data transmission, the arrangement
of contiguous BITs or Frame sequences
which make a group, word, message or
language.
Frame
In data transmission, the sequence
of contiguous BITs bracketed by and
including beginning and ending fl ag
sequences. Unit of data of the data link
layer.
FS
Frame Synchronization to mark the fi rst
information BIT
FSI
Abbreviation for “Fixed Station
Interface”.
FSK
Frequency Shift Keying A form of
frequency modulation in which the
modulating signal shifts the output
frequency between predetermined
values.
FSNF
Abbreviation for “Fragment Sequence
Number Field” in the Common Air
Interface.
FTP
Abbreviation for “File Transfer Protocol.”
Full-Duplex
An operating method in which
transmission is permitted,
simultaneously, in both directions of a
telecommunications channel.
G Interface
The label given to the Inter Sub-System
Interface in the General System Model.
Galois Field (GF)
A data fi eld used to calculate parity
checks for a Reed-Solomon code.
Gateway
An interface that provides the necessary
protocol translation between disparate
networks.