Instruction manual

ACU-1000 Operations Manual
Interoperability Now 9
Glossary
ACU
Controller
Intuitive, icon based control program for operating an ACU-1000 interoperability system, either
locally or over an IP connection. Provides full control & configuration capabilities.
AP-1
Audio Processor Module; applies a variety of functions to other ACU-1000 module inputs or
outputs, mainly used for additional digital delay. Obsolete.
CSAP
Communications System Access Point – Any entry into the Interoperability System (UHF radio,
telephone line, 8000 MHz trunked talk group, Nextel radio, audio console, etc.)
COR
Carrier Operated Relay - A receiver signal that gives a positive indication a carrier or signal is
being received and the receiver is unsquelched. Same as COS.
COS
Carrier Operated Squelch - See COR.
CPM-2
Original Control Processor Module, replaced by the CPM-4
CPM-4
Control Processor Module - This ACU module controls all aspects of system operation.
Cross-
Connection
A link made between two communications systems interfaced to a single ACU-1000 chassis, or
between systems interfaced over a network to two or more ACU-1000 systems.
CTCSS
Continuous Tone Controlled Squelch System. A squelch system using EIA Standardized sub-
audible tones in the 67Hz to 250Hz frequency range. An FM squelch, which opens only when
the proper sub-audible tone is present.
DIP Switch
Dual In-Line Package Switch (“dipswitch”) - A multi-unit switch that fits into a standard DIP
integrated circuit footprint. It usually contains eight or ten individual switches.
DTMF
Dual Tone Multi Frequency - The standard touch-tone telephone dialing method sends DTMF
characters over the PSTN line.
DSP
Digital Signal Processing (or Processor).
DSP-1
Original Digital Signal Processor Module, replaced by the DSP-2.
DSP-2
The Digital Signal Processor Module, the main radio interface of the ACU-1000 system. DSP
algorithms provided include VOX, VMR, Audio Delay, Noise Reduction, and Tone Keying. The
DSP-2 also provides an Ethernet interface.
EIA
Electronic Industries Association.
Extension
Each ACU-1000 interface module is given an extension number. It’s used to define and track
cross-connections between communications systems interfaced to the ACU-1000.
Hangtime
A system with hangtime will remain in the transmit mode for the duration of the set hangtime
beyond the time indicated by any keying inputs. The hangtime prevents transmitter unkey
during brief pauses in the transmission.
HSP-2A
The ACU-1000 Handset/Speaker/Prompt Module. It provides a local operator interface via a
keypad, handset & speaker. System voice prompt circuitry also resides on this module.
Key
To key a transmitter means to cause it to transmit.
LED
Light Emitting Diode.
LMR
Land Mobile Radio.
LP-2
Replaced by the LP-2
LP-2
The Local Phone Module that interfaces a standard telephone set to the ACU-1000 system.
Mute
To quiet or inhibit audio.
Network
Talkpath
A RoIP/VoIP link creating a cross-connection over an IP-based network.
PCB
Printed Circuit Board.
Port
The ACU rear panel connectors P1 through P12 provide Communications Ports to interface with
other communications equipment.
PSTN-1
Replaced by the PSTN-2
PSTN-2
Public Switched Telephone Network Module; interfaces a telephone system to the ACU-1000.
PTT
Push-to-Talk. An active PTT signal causes a transmitter to key.
RDI-1
An ACU module to interface with radios and other 4-wire devices; it does not contain the DSP
algorithms of the DSP-1 or DSP-2 modules, but includes an RS-232 port. Obsolete.
RoIP
TM
Radio over Internet Protocol. Raytheon proprietary protocol which sends voice plus radio