Copyright © 2015 RCA Communications Systems
RPX4500/RPX4600 P25 PORTABLE RADIO – USER MANUAL
9
GLOSSARY OF TERMS
A summary of common radio terms and some other terms used in this document, and their
meanings, are given below.
BANK
SEE ZONE.
Channel
A logical combination of: Network Access Code (NAC); Radio Frequency; De-
fault Talk Group Identity (TGID); Encryption Key Index (KID); and other channel
associated parameters (CTCSS, Scan etc).
PS
Programming Software. Used to configure the radio options and parameters.
DTMF
Dual Tone Multi-Frequency signaling. Used to dial into telephone networks
using tone dialing.
IECEx Scheme
The International Electrotechnical Commission Scheme for Certification to
Standards Relating to Equipment for use in Explosive Atmospheres.
Monitor
Mode of Radio Receive – Any P25 signal regardless of NAC or TGID will be
heard
MPT1327
A signaling standard for Trunked Private Land Mobile Radio Systems. Defined
for systems in the UK but also used outside the UK. Issued January 1988.
Muted
Audio is prevented from being heard through the speaker.
NAC
Network Access Code – Used as a filter where multiple networks may share a
common RF frequency.
Normal Mute
Mode of Radio Receiver – Only signals with matching NAC will be heard.
P25 Channel
Definition consisting of Tx and Rx RF frequencies, NAC and TGID.
P25 Conventional
Non-trunked digital, like digital Private Mobile Radio (PMR).
PTT
Press To Talk. This is the term given to the operator’s key normally used to
transmit a message.
Radio Unit ID
Unique identifier allocated to each radio (0-16,000,000).
Selective
Mode of radio receiver – Only signals with matching NAC and TGID or Unit ID
will be heard.
Unmuted
Audio can be heard from the loudspeaker.
Zone
A collection of channels (usually organized by functional group of users).
