68009482001 September 9, 2011
Chapter 10 Acronyms and Definitions
10.1 Terms and Definitions
The following items listed below are the terms and definitions:
Term Definition
10/100-BASE-T 10/100 Megabit Twisted Pair Ethernet Network
2W Two-Wire Interface (Transmit and Receive on same copper pair)
4W Four-Wire Interface (Transmit and Receive on different copper pairs)
ACIM ASTRO Console Interface Module; a Motorola proprietary digital RS232 interface to
the Console via the CCGW
AGC Automatic Gain Control
ASTRO Brand name for APCO 25 compliant product
CCGW Conventional Channel Gateway
Channel The multiple frequencies/talkgroups that a Consolette station can support
Channel Activity Another name for the base station’s E-Lead. An output from the station indicating it is
receiving a qualified signal.
CPS Customer Programming Software; a PC-based software tool that allows customizing
radio functionality, including transmit and receive frequencies.
E&M Keying Ear and Mouth Keying. See PTT and Channel Activity.
FCC Federal Communications Commission
FT (Function Tone) The short tone bursts that follow high level guard tone. These bursts are mapped to
functions in the station. For instance, Setting the repeat mode, choosing a frequency,
etc. Typically function tone is 40 ms in length. Dual function tone may be needed if
encryption is supported.
GCAI Global Core Accessory Interface; Motorola proprietary accessory port for use with
Motorola approved cables; USB and RS232 styles supported
HLGT (High Level Guard
Tone)
The initial tone of a TRC sequence begins with High Level Guard Tone. Typically a
120 ms burst of guard tone at an elevated level.
ID Identification
IP Internet Protocol
LAN Local Area Network
LED Light Emitting Diode
LLGT (Low Level Guard
Tone)
If the base station is to remain keyed the last function tone is followed by low level
guard tone. As along as low level guard tone is present the station will remain keyed.
When voice is routed to the station, it is summed with low-level guard tone in order to
keep the station keyed.
MDC1200 Motorola signaling format used on radio transmissions
NIC Network Interface Card
OS Operating System
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