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AS List of Acronyms

3U

84 HP

  • Rack horizontal pitch. One "HP" is equivalent to 0.2 inch

AC

  • Alternating Current (as opposed to DC)

ACH

  • Anti Condensation Heater

AS

  • Applied Systems (S) Pte Ltd

AIU

  • Alarm Interface Unit

BBU

  • Battery Backup Unit (Applies to DCC and DCC-CN)

BOM

  • Bill of Materials

BQ

  • Bill of Quantity

CAB

  • Changi Air Base

CAB-E

  • Changi Air Base East

CAB-W

  • Changi Air Base West

CAN

  • Controller Area Network

CB

  • As in CB Phone. Refers to a system in which the whole of the energy required for the transmission and signalling is drawn from the exchange. See also LB

CCA

  • Circuit Card Assembly

CLI

  • Command Line Interface

COTS

  • Commercial off-the-shelf

CPLD

  • Complex Programmable Logic Device (alsosee FPGA)

CPU

  • Central Processing Unit

CRC

  • Cyclic Redundancy Check

DC

  • Direct Current (as opposed to AC)

DCC

  • Deployment Centralised Control

DCC-CN

  • Deployment Centralised Control (Compact Nexus)

DCE

  • Data Communication Equipment

DHCP

  • Dynamic Host Configuration Protocol

DSTA

  • Defense Science and Technology Agency, Singapore

DTE

  • Data Terminal Equipment

EMC

  • Electromagnetic Compatibility

ESN

  • Electronic Serial Number

ESR

  • Equivalent Series Resistance (mainly applies to capacitors used in SMPS)

FAT

  • Factory Acceptance Test

FO

  • Fiber Optic

FPGA

  • Field Programmable Gate Array

FXO

  • Foreign eXchange Office. A device which connects to the telephone exchange. The FXO interface receives the loop current from the Central Office and generates a loop closure to initiate a call.

FXS

  • Foreign eXchange Subscriber. A device which connects to the subscriber and delivers dial tone, ringing voltage, and loop power

GCB

  • Genset Circuit Breaker

GFE

  • Government Furnished Equipment

GUI

  • Graphical User Interface

HF

  • High Frequency (as applied to RF Communications 3 to 30 MHz)

HMI

  • Human to Machine Interface

HTX

IDC

  • Insulation Displacement Connector, a form of mass termination involving ribbon cables

ICD

  • Installation Control Document
  • Interconnect Document

IGMP

  • Internet Group Management Protocol

IICD

  • Internal Interconnect Drawing / Diagram

IP

  • Internet Protocol

LB

  • As in LB phone. The LB system was superseded by the Central Battery system. Military field phones are usually of the LB variety

LDO

  • Low Drop Out (as for Linear Regulators)

LNA

  • Low Noise Amplifier (mainly applies to RF Amplifiers)

LRU

  • Line Replaceable Unit

MCB

  • Miniature Circuit Breaker

MCCB

  • Moulded Case Circuit Breaker

MCU

  • Main controller unit

MIB

  • Management Information Base (also see SNMP)

MPN

  • Manufacturer's Part Number

MSS

  • ST Engineering Mission Software and Services

NCS

NISPA

  • Network Integrated System PA

OEM

  • Original Equipment Manufacturer

OLED

  • Organic Light Emitting Diode

OS

  • Operating System

OSAT

  • On Site Acceptance Test

PA

  • Public Address System
  • Power Amplifier

PCB

  • Printed Circuit Board

PCBA

  • Printed Circuit Board Assembly

PDU

  • Protocol Data Unit

POE

  • Power Over Ethernet

POTS

  • Plain Old Telephone Service refers to the traditional, analog voice transmission phone system

PSTN

  • Public Switched Telephone Service

PSU

  • Power Supply Unit

RAM

  • Random Access Memory

RF

  • Radio Frequency

RFQ

  • Request for Quotation

RJ45

  • Registered Jack used usually for connection of a host to the network

ROM

  • Read Only Memory
  • Rough Order of Magnitude

RSN

  • Republic of Singapore Navy

RTOS

  • Real Time Operating System

RTP

  • Real Time Protocol (as for IP based communications)

RX

  • Receive

SAF

  • Singapore Armed Forces

SBAB

  • Sembawang Air Base

SCADA

  • Supervisory Control and Data Acquisition

SLA

  • Service Level Agreement
  • Sealed Lead Acid (as in storage battery)

SMPS

  • Switched Mode Power Supply

SNMP

  • Simple Network Management Protocol (also see MIB)

SOC

  • State of Charge (as applied to VRLA batteries)

SOP

  • Standard Operating Procedure

SSO

  • Switch Socket Outlet

ST

TAB

  • Tengah Air Base

TID

  • Touch Input Display

TX

  • Transmit

UDP

  • User Datagram Protocol

UPS

  • Uninterruptable Power Supply

UHF

  • Ultra High Frequency (as applied to RF Communications 300 MHz to 3 GHz)

UUT

  • Unit Under Test

VHF

  • Very High Frequency (as applied to RF Communications 30 MHz to 300 MHz)

VOX

  • Voice Operated Exchange / Voice Operated Transmission (applies to Radio Transmit)

VRLA

  • Valve Regulated Lead Acid (as in storage battery)