Definitions and acronyms – GAI-Tronics L3149B C200 Advanced Deskset User Manual
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Definitions and Acronyms
Term Definition
CSQ
Carrier squelch
CTS
Clear-to-send
DPDT
Dual-Pole Double Throw
DPST
Dual-Pole Single Throw
DPL
Digital Private Line - a system analogous to Private Line but using low speed digital
signaling instead of subaudible tones.
HLGT
High level guard tone
LLGT
Low level guard tone
LOTL
Line Operated Transmit Light
LTR
Logic Trunked Radio
MDC
Motorola Digital Communication
PL
Private Line - is a means of grouping users of a common radio channel. Subaudible tones
are transmitted with audio; a particular radio’s speaker (or the speakers of a group of
radios) will unmute to broadcast a transmission only if the associated subaudible tone
identifies it as belonging to the radio’s user group.
PTT
Push-to-talk
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