RWCS Network / Telecomm Technical Glossary

Robert Wheatley Consulting Services

Network / Telecomm Technical Glossary


Index:
A B C D E F G H I J K L M N O P Q R S T U V W XYZ

10Base-2	A type of Ethernet LAN. 10 megabit Coax "Thin Net"
10Base-5	A type of Ethernet LAN. 10 megabit Coax "Thick Net"
10Base-T	A type of Ethernet LAN. 10 megabit Twisted pair.
10Base-TX	A type of Ethernet LAN. 10 megabit Fiber Optic.
100Base-T	A type of Ethernet LAN. 100 megabit Twisted pair
100Base-TX	A type of Ethernet LAN. 100 megabit Fiber Optic

A

A-to-D (A/D)	Analog to Digital Converter
AAL	ATM Adaption Layer
AAL-SDU	AAL Service Data Unit
ABM	Asynchronous balance mode
ABR	Available Bit Rate
ABS	Alternate Billing Services
AC	Automatic Callback
ACD	Automatic Call Distributor
ACF	Address Control Field
ACK	Acknowledgement
ACSCC	Access Call Setup Characterization Committee
ACT	Activity Bit
ADCCP	Advanced Data Communications Control Procedures
ADPCM	Adaptive Differential Pulse Code Modulation
ADSL	Asymetric Digital Suberscriber Line
ADTS	Automated Digital Terminal Systems
AFI	Authority and format identifier
AFR	Automatic Flexible Routing
AG/EEE	Above Ground Electronic Equipment Enclosures
Ai	Signaling ID assigned by Exchange A
AID	Access IDentifier
AIM	ATM Inverse Multiplexer
AIN	Advanced Inteligent Network
AIR	Additive Increase Rate
AIS	Alarm Indication Signal
AM	Amplitude Modulation
AMA	Automatic Message Accounting
AMI	Alternate Mark Inversion
Analog	Any representation of information in which the signal is proportional to the information represented.
ANE	Access Network Equipment
ANI	Automatic Number Identification
ANM	Answer Message
ANS	Advanced Networks and Services
ANSI	American National Standards Institute
ANSNET	A major Wide Area Network that forms part of the Internet.
API	Application Programming Interface
APPN	Advanced Peer to Peer Network
APS	Automatic Protection Switching
AR	Automatic Recall
ARE	All Routes Explorer
ARP	Address resolution protocol
ARPA	Advanced Research Projects Agency
ARPANET	An early long haul network funded by ARPA
ARQ	Automatic Repeat reQuest
ASCII	American Standard Communication Information Interchange
ASE	Application Service Element
ASIC	Application Specific Integrated Circuit
ASR	Access Service Request
ATD	Asynchronous Time Division
ATM	Asynchronous Transfer Mode
ATMARP	ATM Address Resolution Protocol
AU	Access Unit
AUI	Access Unit Interface
AUU	ATM User-to-User

B

B-channel B-ICI	Broadband ISDN Inter-Carrier Interface
B-ICI SAAL	B-ICI signaling ATM Adaptation Layer
B-ISDN	Broadband Integrated Service Digital Network
B-NT	Broadband Network Termination
B-TE	Broadband Terminal Equipment
Baud	The number of times per second the signal can change on a transmission line.
BBG	Bellcore Business Group
BBG-I	ISDN Bellcore Business Group
BBS	Bulletin Board Service
BCD	Binary Coded Decimal
Bellcore	Bell Communication Research
BER	Bit Error Rate
BERT	Bit Error Rate Test
BG/EEE	Below Ground Electronic Equipment Enclosure
BIP	Bit Interleaved Parity
BISDN	Broadband ISDN
BISYNC	BInary SYNchronous Control
bit	BInary digiT
BOC	Bell Operating Company
BOM	Beginning of Message
BOOTP	Bootstrap Protocol
BPS	Bits per second
BRI	Basic Rate Interface
BSC	Binary Synchronous Control
BSS	Broadband Switching System
BTN	Billing Telephone Number
BW	Bandwidth

C

CABS	Carrier Access Billing System
CAC	Carrier Access Code
CAC	Connection Admission Control
CAD	Computer Aided Design
CAM	Computer Aided Manufacturing
CATV	Community Area TeleVision (Cable Television)
CBDS	Connectionless Broadband Data Service
CBR	Constant Bit Rate
CCITT	Consultative Committee on International Telephone & Telegraph
CCS	Common Channel Signaling
CCSS7	Common Channel Signaling System 7
CCW	Cancel Call Waiting
CDPD	Cellular Digital Packet Data
CDT	Cell Delay Tolerance
CDV	Cell Delay Variation
CDVT	Cell Delay Variation Tolerance
CES	Circuit Emulation Service
CFV	Call Forwarding Variable
CIB	CRC Indicator Bit
CIC	Carrier Identification Code
CID	Caller IDentifier
CLNS	Connectionless Network Service
CMC	Cellular Mobile Carrier
CMI	Coded Mark Inversion
CND	Calling Number Delivery
CNI	Customer to Network Interface
CO	Central Office
CODEC	COder DECoder
COM	Continuation of Message
CompuServe	A commercial organization that offers network services primarily through telephone connections.
COS	Class of Service
CPAF	Customer Premise Access Facility
CPE	Customer Premise Equipment
CPM	Call Progress Message
CPN	Customer Premises Network
CPN	Calling Party Number
CPR	Call Processing Record
CPU	Central Processing Unit
CRC	Cyclic Redundancy Check
CRC32	32 bit CRC
CRCG	Common Routing Connection Group
CSNET	Computer Science NETwork
CSPDN	Circuit Switched Public Data Network
CSR	Customer Service Record
CST	Connection Setup Time
CSU	Channel Service Unit
CTS	Clear To Send
CW	Call Waiting
CWD	Call Waiting Deluxe

D

D/A (D-to-A)	Digital to Analog Converter
DA	Destination Address
DACS	Digital Access Crossconnect System
DBMS	Data Base Management System
DCE	Data Communications Equipment
DCS	Digital Crossconnect System
DDS	Digital Data System
DES	Data Encryption Standard
DLC	Digital Loop Carrier
DMDD	Distributed Multiplexing Distributed Demultiplexing
DN	Directory Number
Dotted Quad	An IP address in decimal format - Your Dotted Quad is 38.103.63.17
DP	Dial Pulse
DPLL	Digital phase-locked loop
DR	Distinctive Ring
DRCW	Distinctive Ring Call Waiting
DS0 (DS-0)	Digital Signal - rate Zero (64 Kbits/S) - (1 Standard Telephone Voice Channel)
DS1 (DS-1)	Digital Signal - rate One (1.544 Mbits/S) - 24 DS0s
DS2 (DS-2)	Digital Signal - rate Two (6.176 Mbits/S) - 96 DS0s - 4 DS1s
DS3 (DS-3)	Digital Signal - rate Three (44.736 Mbits/S) - 672 DS0s - 28 DS1s - 7 DS2s
DSID	Destination Signaling Identifier
DSP	Digital Signal Processor
DSR	Data Set Ready
DSU	Data Service Unit
DSX	Digital Signal Cross-Connect
DTE	Data Terminal Equipment
DTMF	Dual Tone Multi-Frequency (Touch Tones)
DTR	Data Terminal Ready
DXI	Data Exchange Interface

E

E-Mail	Electronic mail
E1	European Transmission rate One (2.048 Mbits/S)
E2	European Transmission rate Two (34.368 Mbits/S)
E4	European Transmission rate Four (139.264 Mbits/S)
EA	Extended Address
EBCDIC	Extended binary coded decimal interchange code
EC	Exchange Carrier
ECMA	European Computer Manufacturers Association
ECM	Electronic Counter Measures
ECP	Extended Capabilities Port
EDI	Electronic Data Interchange
EEE	Electronic Equipment Enclosure
EG	Earth Ground
EIA	Electronic Industries Association
EMC	ElectroMagnetic Compatibility
EMI	ElectroMagnetic Interference
EOM	End Of Message
EPP	Enhanced Parallel Port
ESD	ElectroStatic Discharge
ESIG	European SMDS Interest Group
ETAG	End Tag
Ethernet	A popular LAN technology invented at Xerox Corporation.
ETSI	European Telecommunications Standards Institute
EU	End User

F

FAQ	Frequently Asked Questions
FCC	Federal Communications Commission
FCS	Fast Circuit Switching
FCS	Frame Check Sequence
FDD	Floppy Disk Drive
FDDI	Fibre Distributed Digital Interface
FDM	Frequency-division multiplexing
FEBE	Far End Block Error
FEC	Forward Error Correction
FEP	Front End Processor
FET	Field Effect Transistor
Fiber optics	The use of light conducted by glass strands to transfer data.
FIFO	First In First Out memory
FITL	Fiber In The Loop
FM	Frequency modulation
FR	Frame Relay
FRAD	Frame Relay Access Device
FRS	Frame Relay Service
FSK	Frequency-Shift Keying
FT1	Fractional T1 (See T1)
FTP	File Transfer Protocol
FTTH	Fiber To The Home
Full-duplex	A data interchange protocol which echoes all data received
FXO	Foreign Exchange Office (CO end of a loopstart POTS line)
FXS	Foreign Exchange Subscriber (Subscriber end of a loopstart POTS line)
FYI	For Your Information

G

GAP	Generic Address Parameter
Gateway	Computer Equipment Manufacturer
Gbits/S	1,000,000,000 Bits per Second (Giga Bits per Second)
GFC	Generic Flow Control
GIF	Graphical Interchange Format (a picture file format)
GR	Generic Requirement
GTPU	Gas Tube Protection Unit
GUI	Graphical User Interface

H

Half-duplex	A data interchange protocol where the transmitted data is echoed back locally at the transmitting end
HBRTS	High Bit Rate Transmission System
HCDS	High Capacity Digital Services
HCS	Header Check Sequence
HDB3	High Density Bipolar 3 (A method of "Zero" suppression)
HDD	Hard Disk Hrive (the non-removable disk in your computer)
HDLC	High level Data Link Control
HDSL	High rate Digital Subscriber Line
HDTV	High Definition Television
HEC	Header Error Control
HOL	Head of Line
homepage	A page of information accessible through the WWW
HTML	HyperText Markup Language
HTTP	HyperText Transport Protocol
HUB	Central connection device for a LAN (usually an Ethernet Used with 10base-T)
hypertext	A system for storing pages of textual information that each contain embedded references to other pages of information

I

I2C	Integer-Integrated Circuit (Philips - Synchrounous Bidirectional Serial Bus)
IAB	Internet Architecture Board
IAM	Initial Address Message
IBC	Integrated Broadband Communications
IC	Integrated Circuit
IC	Interexchange Carrier
ICD	International Code Designator
ICMP	Internet Control Message Protocol
ICN	InterConnecting Network
ID	Identifier
IDLC	Integrated Digital Loop Carrier
IDU	Interface Data Unit
IE	Information Element
IEC	Inter-exchange Carrier
IEEE	Institute of Electrical and Electronic Engineers
IETF	Internet Engineering Task Force
ILEC	Independant Local Exchange Carrier
IN	Intelligent Network
INC	InterNational Carrier
InterNIC	Internet Network Information Center
IP	Internet Protocol
IP Address	Address on the Internet - Your IP = 38.103.63.17
IPLS	InterLATA Private Line Services
IPTS	Intelligent Public Telephone System
IPX	Novell Internetwork Packet Exchange
IS	Information Services
ISDN	Integrated Services Digital Network
ISDU	Isochronous Service Data Unit
ISO	International Standards Organization
Isochronous	A system where data and timing information are mixed together
ISP	Internet Service Provider
ITU	International Telecommunications Union
IXC	IntereXchange Carrier

J

JIS	Japanese Industrial Standards
JPEG	Joint Photographic Experts Group
JTM	Job transfer and manipulation

K

K	Kilo (1000)
Kbit/S	1,000 bits per Second (Kilo Bits per Second)

L

LAN	Local Area Network
LANE	Local Area Network Emulation
LAP	Link Access Procedure
LAP-B (LAPB)	Link Access Procedure Balanced Mode
LAP-D (LAPD)	Link Access Procedure for ISDN 'D' channel
LAP-F (LAPF)	Link Access Procedure for Frame Relay Bearer Mode Service
LATA	Local Access and Transport Area
LEC	Local Exchange Carrier
LED	Light-Emitting Diode
LLC	Local Link Control
LMS	Local Measured Service
LOF	Loss of Frame
LOS	Loss of Signal
LSAP	Link Service Access Point
LSB	Least Significant Bit
LSDB	Listing Services DataBase
LSI	Large Scale Integration
LSS	LATA Switching System
LT	Line Termination
LTE	Line Terminating Equipment

M

M	Mega (1,000,000)
m	mili (0.000,001)
MAN	Metropolitan Area Network
Mbits/S	1,000,000 bits per Second (Mega Bits per Second)
MHS	Message handling service
MIS	Management Information Service
MID	Message IDentifier
MIME	Multipurpose Internet Mail Extensions
MIPS	Millions of Instructions per Second
MLHG	Multi-Line Hunt Group
MMF	Multimode Fiberoptic cable
Modem	MODulator- DEModulator
MPEG	Motion Picture Experts Group
MRCS	Multi-rate Circuit Switching
MS	Meta Signaling
MSB	Most Significant Bit
MSR	Message Storage and Retrieval
MUB	MultiUse Bearer service
MUX	Multiplexer

N

NA	Network Adapter
NAK	Negative AcKnowledgment
NASA	National Aeronautics and Space Administration
NC	Network Channel
NCI	Network Channel Interface
NDIS	Network Driver Interface Specification
NDS	Network Data System
NESC	National Electrical Safety Code
NFS	Network File System
NI	Network Interface
NIC	Network Interface Card
NIST	National Institute of Standards and Technology
NMS	Network Management System
NNTP	Network News Transport Protocol
Node	Point of equipment connection on a network
NPA	Numbering Plan Area (Area Code)
NRM	Network Resource Management
NSE	Network Switching Element
NSAP	Network Service Access Point
NSF	National Science Foundation
NSFNET	National Science Foundation NETwork.
NSP	Network Service Provider
NT	Network Termination
NTM	Network Traffic Management

O

OAM	Operations, Administration and Maintenance
OC	Optical Carrier
OC-1	Optical Carrier - rate One (51.84 Mbits/S)
OC-3	Optical Carrier - rate Three (155.52 Mbits/S)
OC-12	Optical Carrier - rate Twelve (622.08 Mbits/S)
ODI	Open Data-Link Interface
OOF	Out of Frame
OPM	Optical Power Meter
OSI	Open System Interconnection
OTC	Operational Telephone Company
OTDR	Optical Time Domain Reflectometer

P

P-NNI	Private Network to Network Interface
PABX	Private Automatic Branch Exchange
Packet switching	A system where messages are divided into and sent as small blocks of data.
PAD	Packet Assembler and Disassembler
PC	Personal Computer
PCM	Pulse Code Modulation
PDH	Plesiochronous Digital Hierarchy
PDU	Packet Data Unit
PIC	Polyolefin Insulated Conductor
PIN	Personal Identification Number
ping	Packet InterNetwork Gopher.
PLCP	Physical Layer Convergence Procedure
PLL	Phase Locked Loop
PLS	Private Line Service
PLPC	Physical Layer Convergence Protocol
POP	Post Office Provider
POS	Point-Of-Sale
POTS	Plain Old Telephone Service
PPDN	Public Packet Data Network
PPP	Point-to-Point Protocol
PPS	Packets Per Second
PRI	Primary Rate Interface
Prospero	A distributed file system that can be used to access the archie service.
Protocol	The rules two or more computers must follow to exchange messages.
PSDS	Public Switched Digital Service
PSTN	Public Switched Telephone Network
PTT	Post Telephone and Telegraph Administration
PUC	Public Utilities Commission
PVC	Permanent Virtual Connection

Q

QA	Queue Arbitrated
QOS	Quality Of Service
QPSX	Queued Packet and Synchronous Circuit Exchange

R

R&D	Research and Developement
RAI	Remote Alarm Indication
RBOC	Regional Bell Operating Company
RC	Radio Control
RCF	Remote Call Forwarding
RD	Receive Data
RDT	Remote Digital Terminals
RFC	Request For Comment
RFI	Radio Frequency Interference
RFI	Request For Information
RI	Routing Information
RIP	Routing Information Protocol
RISC	Reduced Instruction Set Computing
RM	Resource Management
RNR	Receiver Not Ready
route	The path that network traffic takes from its source to its destination
Router	The equipment which accomplishes routes.
RSVP (protocol)	Resource ReserVation Protocol
RT	Receive Timing
RTS	Request To Send
RTOS	Real Time Operating System
RWCS	Robert Wheatley Consulting Services
RxC	Received eXchange Clock
RxD	Received eXchange Data

S

SA	Source Address
SAAL	Signaling ATM Adaptation Layer
SAP	Service Access Point
SAR	Sucessive Approximation Register
SC	Service Code
SCA	Selective Call Acceptance
SCCP	Signaling Connection and Control Part
SCI	Serial Communications Interface (Example: RS-232)
SCI+	Serial Communications Interface (SCI + Synchrounous Suport)
SCR	Silicon Control Rectifier
SDH	Synchronous Digital Hierarchy
SDLC	Synchronous Data Link Control
SDU	Service Data Unit
SE	Switching Element
SET	Institute for System Design Technology
SG	Signal Ground
SGM	Segmentation Message
SID	Signaling Identifier
Simplex	Simple Exchange
SIOP	Simple Serial I/O Port (Similar to SPI but simpler)
SIPP	SMDS Interface Protocol
SIR	Sustained Information Rate
SLIP	Serial Line Internet Protocol
SMDS	Switched Multi-megabit Data Services
SMF	Single Mode Fiber
smiley	A sequence of characters that indicates humorous intent i.e. :-)
SMPTE	Society of Motion Picture & Television Engineers
SMS	800 Service Management System
SN	Sequence Number
SNA	System Network Architecture
SNAP	Sub Network Access Protocol
SNI	Subscriber - Network Interface
SNMP	Simple Network Management Protocol
SoC	System on a Chip
SOH	Section OverHead
SONET	Synchronous Optical NETwork
SPD	Surge Protection Device
SPE	Synchronous Payload Envelope
SPI	Serial Peripheral Interface (Similar to SCI but faster)
SPID	Service Protocol Identifier
SR	Source Routing (Bridging)
SRS	SIP Relay Service
SS	Switching System
SS7	Signaling System # 7
SSDU	SMDS Service Data Unit
ST	Send Timing
STM	Synchronous Transfer Mode
STM-1	Synchronous Transfer Module - rate One (155.56 Mbits/S)
STM-4	Synchronous Transfer Module - rate Four (622.08 Mbits/S)
STP	Shielded Twisted Pair cable
STS	Synchronous Transfer Signal
STS-1	Synchronous Transfer Signal - rate One (51.84 Mbits/S)
STS-3	Synchronous Transfer Signal - rate Three (155.56 Mbits/S)
STS-12	Synchronous Transfer Signal - rate Twelve (622.08 Mbits/S)
Surfing	A slang phase used by the popular press that means "using Internet services to browse information"
SVC	Switched Virtual Circuit

T

T1	North American Transmission rate One (1.544 Mbits/S)
T carrier	Any of the metallic T type Transmissions systems i.e. T1, T3 etc.
T1S1	ANSI T1 Subcommittee
T3	North American Transmission rate Three (44.736 Mbits/S)
TA	Terminal Adapter
TAU	Test Access Unit
TAXI	Transparent Asynchronous eXchange Interface
TCAS	T-Carrier Administration System
TCP	Transmission Control Protocol
TCP/IP	Transmission Control Protocol/Internet Protocol
TCS	Transmission Convergence Sublayer
TD	Transmit Data
TDM	Time Division Multiplexing
TDR	Time Domain Reflectometry
TE	Terminal Equipment
Tel Co	Telephone Company
TLP	Transmission Level Point
TLPU	Telephone Line Protection Unit
TM	Traffic Management
TMN	Telecommunications Management Network
TMP	Test Management Protocol
Token Ring	A LAN technology in which the network information passes through each node.
TS	Time Stamp
TSG	Time Signal Generator
TxC	Transmit eXchange Clock
TxD	Transmit eXchange Data
TWC	Three-Way Calling

U

UBR	Unspecified Bit Rate
UDP	User Datagram Protocol
UNI	User Network Interface
UNIX	Operating system developed at AT&T Laboratories.
uP	Micro Processor
URL	Uniform Resource Locator (dot.com internet address)
USB	Universal Serial Bus (a PC I/O port)
UTP	Unshielded Twisted Pair cable

V

VBR	Variable Bit Rate
VC	Virtual Channel ( Virtual Circuit)
VCI	Virtual Circuit Identifier
VLAN	Virtual Local Area Network

W

W3C	World Wide Web Consortium
WACS	Wireless Access Communications System
WAIS	Wide Area Information Server
WAN	Wide Area Network
WDM	Wavelength Division Multiplexing
Web	World Wide Web
Whois	Internet service that looks up information about a user in a database.
WTN	Working Telephone Number
WWW	World Wide Web

X

XNS	Xerox Network Systems
XTP	eXpress Transport Protocol


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