Acronyms & Glossary

The acronyms in this business can seem complicated, but the main ones can soon be mastered. However, in the interests of non-discrimination, we offer you the lot:

The terms for data rates can also be confusing. For a bit of enlightenment click here:

A

AC

Alternating Current

ACTS

Advanced Communication Technology Satellite (NASA program)

ACTS

Advanced Communications Technology System (EC program)

ACM

Adaptive Coding & Modulation

AD Adjunct

ADB

Asian Development Bank

ADM

Add/drop multiplexing

ADPCM

Adaptive Differential Pulse Code Modulation

ADSL

Asymmetric Digital Subscriber Line or B-ADSL Broadband-ADSL

AF

Africa

AFC

Automatic Frequency Control

AIN

Advanced Intelligent Network, USA term for IN

Aloha

term used to describe contentious access to a channel (see slotted Aloha)

AM

Africa/Middle East

AMPS

Advanced Mobile Phones System, US analogue cellular

AOL

America Online, a major online/Internet service provider in the USA

AOR

Atlantic Ocean Region

AP

Asia/Pacific

APC

Asia Pacific Telecommunity

APEC

Asia-Pacific Economic Co-operation

APR

Asia Pacific Region

AS

Asia

ASCII

American Standard Code for Information Interchange

ASEAN

Association of South-East Asian Nations

AT

Attention

AT&T

American Telephone & Telegraph Co.

ATC

Alarm Traffic Controller

ATM

Asynchronous Transfer Mode

Attenuation

the loss/absorption of radio frequency signals in the earth’s atmosphere

AUI

Autonomous Unit Interface

B

B-ISDN

Broadband ISDN

BDM

Business Development Manager

BER

Bit Error Rate

Bird

slang term for a satellite

BOD

Bandwidth on Demand

BOT

Build Operate Transfer, associated with a fixed term licence from an established operator (see also BTO)

BPS

Bits Per Second

BSS

Broadcast Satellite Services

BT

British Telecom

BTO

Build Transfer Operate (see also BOT)

BW

Bandwidth

C

C&W

Cable & Wireless

C/N

Carrier-to-Noise Ratio

C-band

6/4 GHz (UL/DL) frequency band used generally for satellite links in Asia, Africa and Latin America due to its resilience to rain fade by comparison with Ku-band Can have TI problems in developed countries..

CA

Carrier Access

CAGR

Compound Annual Growth Rate

CANARIE

Canadian Network for the Advancement of Research, Industry and Education

CAP

Competitive Access Provider

CATV

Cable Television

CB

Call Baring

CBDS

Connectionless Broadband Data Service (Europe’s answer to SMDS)

CC

Calling Centers

CCAF

Call Control Agent Function, IN block

CCF

Call Control Function, IN block

CCITT 7

Signalling System 7 (now SS7) under the auspices of the ITU-T, also known as

CCS

Complete Customer Satisfaction

CDMA

Code Division Multiple Access (either an access technique and/or a cellular system)

CDR

Call Detail Records

CE

Control Elements

CELP

Code Excited Linear Predictive

CEPT

Conference of European Posts and Telecommunications

CFDM

Companded Frequency Division Modulation

CIS

Commonwealth of Independent States

CITEL

The Organisation of Inter-American States (OAS) and its department the Inter-American Telecommunication Commission

CLASS

Custom Local Area Signalling Services

CLI

Calling Line Identity

CME

Compressed Multiplication Equipment

CMIS

Customer Management Information System

CMS

Carrier Monitoring System

CO

Central Office/local Exchange

CODEC

COder DECoder

COO

Chief Operating Officer

CPE

Customer Premises Equipment

CPM

Calls Per Minute

CPU

Central Processing Unit

CSC

Command Signal and Control, used in mesh networks to request connection between remote terminals.

CW

Call Waiting

Cw/ccw

Clockwise/counter clockwise

D

DAMA

Demand Assigned Multiple Access, satellite access scheme, usually for telephony

DARPA

Defence Advanced Research Projects Agency (US)

DATE

Duly Authorised Telecommunications Entity

dB

Decibel

dBm

Decibels referenced to milliwatts

dBW

Decibels referenced to Watts

DC

Direct Current

DCE

Data Communications Equipment

DCME

Digital Compressed Multiplication Equipment

DCMS

Digital Circuit Multiplication System

DCS 1800

Digital Cellular System, GSM variant at 1800 MHz

DCU

Dial up Data Channel Unit

DECT

Digital European Cordless Telephone/Telecommunication

DID

Direct Inward Dialing

DOD

Department of Defense

DP

Data Processing

DP

Distribution Point, final flexibility point in access network, 100m from subscriber

DPI

Dots per Inch

DS

Digital Signal

DS0

Digital Service, Level 0, 64kbps

DS1

Digital Service, Level 1, 1.544 Mbps

DSI

Digital Speech Interpolation

DSS

Direct Satellite Services

DT

Deutsche Telekom, formerly Deutsche Bundespost

DTE

Data Terminal Equipment

DTH

Direct-to-Home, usually satellite television broadcasting

DTMF

Dual Tone Multiple Frequency

E

E&M

Ear & Mouth

E1

2.048 Mbps (Europe orientated)

Eb/No

Energy per Bit to Noise ratio

EC

Enhanced Capacity

EC

European Commission

ECTRA

European Committee for Telecommunications Regulatory Affairs

EDI

Electronic Data Interchange

EE

Eastern Europe

EII

European Information Infrastructure

EIRP

Equivalent Isotropic Radiated Power, a term used to describe and reference the power a satellite is able to project to a point on the earth’s surface.

EPR

Engineering Progress Report

ESA

European Space Agency

ESCON

Enterprise Systems Connection

ETSI

European Telecommunications Standards Institute

EU

European Union

F

FAT

Factory Acceptance Test

FCC

Federal Communications Commission, US Regulator

FCS

Fibre Channel Standard

FDDI

Fibre Distributed Data Interface

FDM

Frequency Division Modulation

FDMA

Frequency Division Multiple Access

FEC

Forward Error Correction

FEP

Front End Processor

FFOL

FDDI Follow On LAN

FITL

Fibre in the (local) Loop

FLAG

Fibre Link Around the Globe

FNCS

Foreign National Control System

FOB

Free On Board

FOC

Final Operating Configuration

Footprint

the area on the earth covered by a particular satellite’s beam

FOS

Follow on Satellite, Intelsat designation

FOW

Forward OrderWire

FPLMTS

Future Public Land Mobile Telecommunications Systems

FR

Frame Relay

FRAD

Frame Relay Access Device

FRS

Frame Relay Service

FSS

Fixed Satellite Service

FT

France Telecom

FT1

Fractional T1

FTAM

File Transfer and Access Management

FTP

File Transfer Protocol

FTTC

Fibre to the Curb (Kerb), linked to VDSL in deployment

FTTH

Fibre to the Home

FXO

Foreign Exchange Office

FXS

Foreign Exchange Service

G

G/T

Gain to System Noise Temperature Ratio

Gbit

Gigabit

GE

General Electric Corporation

GEO

Geostationary Earth Orbit

GESS

General Electric Satellite Services

GHz

Gigahertz (Billion hertz)

GI

General Instruments Corporation

GII

Global Information Infrastructure

GMDSS

Global Maritime Distress and Safety System

GSM

Global System for Mobile communications, originally: Groupe Spéciale Mobile

GSO

Geostationary Earth Orbit

GTF

Global Traffic Forecast (Intelsat)

GTM

Global Traffic Meeting (Intelsat)

GTS

General TeleSystems Group

GUI

Graphical User Interface

GW

Gateway

H

H-pole

Horizontal pole

HDSL

High-Speed Digital Subscriber Line

HFC

Hybrid Fibre Co-ax

HNS

Hughes Network Systems

HPA

High Power Amplifier

HPPI

High Performance Parallel Interface

HSSI

High Speed Serial Interface

HTTP

Hyper Text Transfer Protocol

Hub

used to describe central station in a star network. The central point of a star network is a major antenna, usually 6 metres or more, but sometimes less. The hub also houses the network management system, the modulation equipment and the main system processors and interfaces with the customer's FEP.

HVS

Hospitality Voice Services

Hz

Hertz

I

I/B

Inbound/Outroute (also known as the return link), from remote terminal to hub

IBS

Intelsat Business Service

IBT

International Business Traveller

IDB

International Development Bank

IDL

Interactive Distance Learning

IDR

Intermediate Data Rate

IDU

Indoor Unit, the box which sits in the user's office and provides the interfaces and processing for the VSAT. Every manufacturer has a different term for the IDU, but they all mean the same thing.

IEC

Inter Exchange Carrier

IEEE

Institute for Electrical and Electronics Engineers

IF

Intermediate Frequency

IN

Intelligent Network

INAP

Intelligent Network Application Part Protocol

Inbound

see I/B

Inroute

see I/B

IOC

Initial Operating Configuration

IOR

Indian Ocean Region

IP

Intelligent Peripheral, IN block

IP

Internet Protocol

IPCU

DAMA IP Channel Unit

IPMI

Internet Protocol Multicasting Initiative

IPR

Intellectual Property Rights

IPSL

Integrated IP Software License

IRD

Integrated Receiver/Decoder

ISDN

Integrated Services Digital Network

ISO

International Standards Organisation

ISOC

the Internet Society

ISP

Internet Service Provider

IT

Information Technology (usually refers to computers and the computing environment)

ITU-T

ITU Telecommunications standards body

ITU

International Telecommunications Union

IVPN

International VPN

IXC

Inter-Exchange Carrier (US term)

J

JDS-HR

Japan Digital Services - Half Rate

JPEG

Joint Photographic Experts Group

K

k

kilo (thousand)

Ka-band

20/30 GHz (UL/DL) planned for deployment by several satellite systems in the late 1990s, early 2000 due to increased bandwidth and propensity towards smaller antennas.

kBPS

kilo Bits Per Second

kft

Kilofeet (USA cable length measurement)

kHz

kilohertz (thousand hertz)

Ku-band

10/14 GHz (UL/DL) frequency band, used generally for satellite links in Europe and North America due to its susceptibility to rain fade during heavy rain and problems of TI in many developed countries.

kW

kilowatt

L

L-band

1.5/2.5 GHz (UL/DL) frequency band, primarily used for mobile satellite links (traditionally Inmarsat, but more recently the satellite PCN systems planned for LEO and MEO operation).

LA

Latin America

LAN

Local Area Network (span < 10km)

LATM

Local ATM

LCR

Least Cost Routing

LDCELP

Low Delay CELP

LEC

Local Exchange Carrier, US term

LEO

Low Earth Orbit

Link Budget

a calculation based on satellite power, earth station power and antenna size which describes the parameters of a satellite communications link.

LMDS

Local Multipoint Distribution Service

LNA

Low Noise Amplifier

LNB

Low Noise Block downconverter RF receiver module for a receive-only terminal (data or TVRO).

M

M&C

Monitor and Control

MAC

Monitor and Control

MAN

Metropolitan Area Network (span approximately 50km)

MAP

Mobile Application Part Protocol

Mbps

Million Bits Per Second

MCC

Master Control Center / Computer

MCPC

Multiple Channels Per Carrier

MCS

Master Control Station the main controller, usually for a mesh network. The master controls the network, setting up and tearing down links between VSATs as required.

ME

Middle East

MEO

Medium Earth Orbit

Mesh network

any network station able to communicate with any other network station.

MHz

Megahertz (million hertz)

MIPS

Million Instructions Per Second

MiTTs

Minutes of Telecommunications Traffic

MMCS

Meridian Multi Media Center Switch

MNC

Multi-National Company

Modem

Modulator/Demodulator

MOS

Mean Opinion Score

MPEG

Motion Pictures Experts Group

MPS

Multiple Priority System

MPT

Ministry of Posts and Telecommunications

MSS

Mobile Satellite Service

MTP

Message Transfer Part

N

NA

North America

NAP

Network Access Point

NASA

National Aeronautical and Space Agency (US)

NCB

National Computer Board

NCC

Network Control Computer

NCCC

Network Control Coordination Channel

NCS

National Control System

NCT

Network Control Terminal

NEC

Nippon Electronic Corporation

NGSO

Non-Geostationary Earth Orbit, used as a general descriptive for LEO and MEO systems.

NGW

National Gateway

NII

National Information Infrastructure (for the USA, see also GII and EII)

NISC

National Information Services Council

NIU

Network Interface Unit

NMS

Network Management System, monitors and controls the remote stations (VSATs) in a network, performs traffic analysis and trouble shooting.

NOC

Network Operations Center

NSF

National Science Foundation (US)

NTE

Network Terminating Equipment

O

O&M

Operations and Management

O/B

Outbound/Outroute, from hub to remote terminal

OA&M

Operations Administration and Management

OC

Optical Carrier

ODU

Outdoor Unit, the transmission and reception electronic package mounted on the antenna and connected to the IDU by an IFL cable. This can also be known as the "radio" or the "RF package".

OEM

Original Equipment Manufacturer

OFTEL

Office of Telecommunications (UK Regulator)

OMT

Orthogonal Mode Transducer

ONP

Open Network Provision

OQPSK

Offset Quaternary Phase-shift Keying

Oribital Slot

longitude position above the equator at which a satellite is located

OSI

Open Systems Interconnection

Outbound

see O/B

Outroute

see O/B

P

P6

Pentium 6

PA

Power Amplifier

PABX

Private Automatic Branch Exchange

PAMA

Permanent Assignment Multiple Access

PAS

PanAmSat

PBX

Private Branch Exchange

PC

Personal Computer

PCCA

Pacific Century Corporate Access

PCG

Pacific Century Group

PCM

Pulse Code Modulation

PCN

Personal Communications Network

PCP

Primary Cross-connection Point, street cabinet/flexibility point

PCS

Personal Communication System

PDH

Plesiochronous Digital Hierarchy

PES

Personal Earth Station, Hughes VSAT product

PIN

Personal Identification Number

PLDT

Philippines Long Distance Telephone Company

PMO

Program Management Office

PN

Pseudo Noise

POC

Point Of Contact

POM

Project Office Manager

POP/PoP

Point of Presence, usually referring to an Internet service provider/access point

POR

Pacific Ocean Region

POTS

Plain Old Telephone Service

PRB

Project Review Board

PRI

Primary Rate Interface

PSC

Project Steering Committee

PSN

Public Switched Network

PSTN

Public Switched Telephone Network

PT

Point

PTO

Private Telecommunications Operator

PTS

Per Trunk Signaling

PTT

Posts, Telegraph and Telephone company (usually a government monopoly operator)

PVC

Permanent Virtual Circuit, as opposed to Switched Virtual Circuit

Pwr

Power

Q

QoS

Quality of Service

QPM

Quarterly Progress Meeting

QPR

Quarterly Progress Report

QPSK

Quadrature Phase Shift Keying, a modulation scheme

R

R&D

Research and Design

RAITN

Regional Arab Information Technology Network

RAM

Random Access Memory

RASCOM

Regional African Satellite Communications Organisation

RBOC

Regional Bell Operating Company

Remote

or remote terminal, used to describe a VSAT installation

RF

Radio Frequency

RFC

Request for Comments

RFFP

Request For Final Proposals

RFI

Request for Information

RFP

Request for Proposal

RFT

Radio Frequency Transmitter used to describe large antennas with associated receive/transmit equipment

RJ-11

Registered Jack –11

ROM

Read Only Memory

ROW

Return OrderWire

RS232

Recommended Standard –232

RSVP

Repondez s’il vous plait (please reply)

Rx

Receive

S

S-A

Scientific-Atlanta

S-band

4/2 GHz (UL/DL) frequency band

SATCOM

Satellite Communications

Satellite Capacity

the resources required for a link between two terminals, usually calculated in satellite power versus satellite bandwidth

SCADA

Supervisory Control and Data Acquisition

SCCP

Signalling Connection Control Part, part of SS7

SCE

Service Creation Environment, IN block

SCEP

Service Creation Environment Point, IN block

SCF

Service Control Function, IN block

SCP

Service Control Point, IN block

SCPC

Single Channel per Carrier, satellite dedicated circuit, the satellite equivalent to a leased line. Actually an SCPC link comprises two clear channels, usually running at rates from 9.6 kbps to 2 Mbps, but the rate could be far higher.

SDA

System Design Authority

SDF

Service Data Function, IN block

SDH

Synchronous Digital Hierarchy, follow on from PDH

SDLC

Synchronous Data Link Control

SDMA

Space Domain Multiple Access

SDP

Service Data Point, IN block

SIB

Service Independent Building Block, IN block

SITA

Société Internationale de Télécommunications Aéronautique

Slotted Aloha

term used to describe time divided contentious access to a channel, also known as TDMA

SMAP

Service Management Access Point, IN block

SMCS

Short Message Service Center

SMDS

Switched Multimegabit Data Service, connectionless data service

SME

Short Message Entity

SME

Small to Medium sized Enterprise

SMP

Service Management Point, IN block

SMS

Service Management System, IN block

SMS

Short Message Service

SMSC

Short Message Service Centre, part of GSM messaging system

SN

Service Node, IN block

SNA

Systems Network Architecture

SNG

Satellite News Gathering

SoHo

Small office/Home office

SONET

Synchronous Optical Network, US equivalent to SDH

Space Segment

technically refers to the satellite, but often used to describe satellite capacity

SPCN

Satellite Personal Communications Network

SRC/DST

Source/Destination

SRF

Specialised Resource Function, IN block

SS/TDMA

Satellite Switched Time Division Multiple Access, Intelsat service

SS5

Signaling System 5

SS7

Signalling System 7, supported by the ITU-T, also known as CCITT 7

SSF

Service Switching Function, IN block

SSP

Service Switching Point, IN block

SSPA

Solid State Power Amplifier

ST

Subscriber Terminals

ST1

Switched T1

Star network

all communications between remote stations required to transit a central hub.

STM

Satellite Technology Management, Inc.

STM

Synchronous Transfer Mode, or

STM

Synchronous Transfer Module

T

T1

1.544 Mbps (US orientated)

TACS

Total Access Communications Systems (Analogue)

TAM

Total Available Market

TAS

Telecommunications Authority of Singapore

TBD

To Be Determined

TCP/IP

Transmission Control Protocol/Internet Protocol

TDM

Time Division Multiplexing, a satellite channel divided into time slots for transmission from a central hub to a group of VSAT sites. Individual time slots can be addressed specifically to one or more VSATs. Usually used as the access protocol for the outbound channel (hub to VSAT) of a VSAT system.

TDMA

Time Division Multiple Access, a contentious access satellite channel which is divided into time slots for sharing between VSATs at different sites usually for connection to a hub. Usually used as the access protocol for the inbound channel (VSAT to hub) of a VSAT system.

TES

Telephony Earth Station (Hughes SCPC DAMA product)

TI

Terrestrial Interference

TMC

Terminal Monitor and Control

TMN

Telecommunication Management Network

TQM

Total Quality Management

Transponder

a defined amount of bandwidth supported by various components on the satellite. Measured in increments of MHz (usually 36, 48 or 72).

TRM

Technical Review Meeting

TVRO

Television Receive Only earth station

Tx

Transmit

U

UAE

United Arab Emirates

UDP

User Datagram Protocol

UEM

Universal Equipment Modules

UIC

User Interface Client

UMTS

Universal Mobile Telecommunications System

UNI

User Network Interface

UPN

Universal Personal Number

UPT

Universal Personal Telecommunications

V

V-band

50/40 GHz

V-pole

Vertical-pole

VAC

Voltage Alternating Current

VADSL or VDSL

Very high speed (Asymmetric) Digital Subscriber Line

VEC

Voice Equivalent Circuit

VFCU

Voice/FAX Channel Unit

VM

Voice Mail

VME

Versa Module Eurocard

VMM

Voice / Modem Module

VPN

Virtual Private Network

VPS

Voice Processing System

VSAT

Very Small Aperture Terminal, business premises earth stations, term used to describe almost any direct to business satellite earth station, one-way or interactive. Typically however, it is used for data systems (interactive less than 2.4 metre antennas and one-way less than 1.8 metre antennas). Can use TDM/TDMA, SCPC or DAMA access schemes.

VSSP

Virtual Service Switching Point

W

W

Watt

WAN

Wide Area Network, covers LANs and MANs, data limited to available rates

WB

World Bank

WBS

Work Breakdown Structure

WC

Watts per channel

WDM

Wavelength Division Multiplexing, used to increase capacity on fibre

WE

Western Europe

WLL/WiLL

Wireless Local Loop, WiLL is also Motorola’s WLL product line name

WTO

World Trade Organisation

WWW

World Wide Web

X

X-band

6-10 GHz (UL/DL) frequency band, military use.

xDSL

term used to describe all types of Digital Subscriber Line technologies (ADSL/VDSLHDSL etc.)

Y

Yank

term used to describe Americans, English slang for pull as in "pull your chain"

Z

Z-band

Only kidding, although there probably is a Z-band, I just needed a Zed (see in Yankee) to finish off.

 

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