A (top)
AAL5 - ATM Adoption Layer 5
ABR - Available Bit Rate
ADSL - Asymmetrical Digital Subscriber Line
AN - Access Node
ANSI - American National Standards Institute
APON - ATM Passive Optical Network
ASCII - American Standard Code for Information Interchange
ASIC - Application Specific Integrated Circuit
ATM - Asynchronous Transfer Mode
ATMOS - ATM Operating System
ATU - ADSL Transceiver Unit
ATU-C - ADSL Transmission Unit - Central Office
ATU-R - ADSL Transmission Unit - Remote
AWG - American Wire Gauge
B (top)
B8ZS - Binary Eight Zero Suppression
BER - Basic Encoding Rate; also, Bit Error Ratio
BERT - Bit Error Rate Test
BISDN - Broadband Integrated Services Digital Network
BONDING - Bandwidth-ON-Demand Interoperability Group
Bps - Bits per second
BRA - Basic Rate Access
BRI - Basic Rate Interface
C (top)
CAN - Campus Area Network
CAP - Carrierless Amplitude and Phase modulation; also, Competitive
Access Provider
CAT-3 - Category 3 Cabling
CAT-5 - Category 5 Cabling
CATV - Community Antenna Television; also, Cable Television
CBR - Constant Bit Rate
CCITT - Consultative Committee for International Telegraph and
Telephone
CEU - Commercial End User
CLEC - Competitive Local Exchange Carrier
CO - Central Office
CODEC - COder/DECoder
CPE - Customer Premises Equipment
CRC - Cyclic Redundancy Check
CSA - Carrier Service Area
CSMA/CD - Carrier Sense Multiple Access/Collision Detection
CSU - Channel Service Unit
D (top)
DACS - Digital Access & Cross-connect System
DCE - Data Circuit-terminating Equipment
DCS - Digital Access & Cross-connect System
DDS - Digital Data Service
DHCP - Dynamic Host Control Protocol
DLC - Digital Loop Carrier
DLCI - Data Link Connection Identifier
DMT - Discrete Multi-Tone
DQDB - Distributed Queue Dual Bus
DRAM - Dynamic Random Access Memory
DS-0 - Digital Signal, level 0
DS-1 - Digital Signal, level 1
DS-3 - Digital Signal, level 3
DSL - Digital Subscriber Line
DSLAM - Digital Subscriber Line Access Multiplexer
DSP - Digital Signal Processor
DSU - Data Service Unit
DTE - Data Terminal Equipment
DWDM - Dense Wave Division Multiplexing
DWMT - Discrete Wavelet Multi-Tone
E (top)
EIA/TIA - Electronic Industries Association/Telecommunications
Industry Association
EMS - Element Management System
ETSI - European Telecommunications Standards Institute
EU - European Union
F (top)
FCC - Federal Communications Commission
FDDI - Fiber Distributed Data Interface
FDI - Feeder Distribution Interface
FDM - Frequency Division Multiplexing
FEXT - Far End CrossTalk
FRAD - Frame Relay Access Device
FRF - Frame Relay Forum
FRSP - Frame Relay Service Provider
FSS - Fixed Satellite Service
FTP - File Transfer Protocol
FTTC - Fiber To The Curb; also FTTK
FTTCab - Fiber To The Cabinet
FTTH - Fiber To The Home
G (top)
Gbps - Gigabits per second
GUI - Graphical User Interface
H (top)
HDSL - High bit rate Digital Subscriber Line
HFC - Hybrid Fiber Coax
HPF - High Pass Filter
HTML - Hyper-Text Markup Language
HTU-C - HDSL Transmission Unit - Central Office
HTU-R - HDSL Transmission Unit - Remote
Hz - Hertz
I (top)
IDC - Insulation Displacement Connection
IDSL - ISDN Digital Subscriber Line
IEEE - Institute of Electrical and Electronic Engineers
IETF - Internet Engineering Task Force
ILEC - Incumbent Local Exchange Carrier
IP - Internet Protocol
IPX - Internetwork Packet eXchange
ISA - Industry Standard Architecture
ISDN - Integrated Services Digital Network
ISO - International Standards Organization
ISOS - Integrated Software On Silicon
ISP - Internet Service Provider
ITU-T, ITU-TSS - International
Telecommunications Union - Telecommunications Standards Sector
IXC - IntereXchange Carrier
J (top)
JPEG - Joint Photographic Experts Group
K (top)
Kbps - Kilobits per second
KHz - KiloHertz
L (top)
L2TP - Layer Two Tunneling Protocol
LAN - Local Area Network
LANE - LAN Emulation
LATA - Local Access Transport Area
LEC - Local Exchange Carrier
LMDS - Local Multipoint Distributed Service
LPF - Low Pass Filter
M (top)
MAC - Media Access Control
MAE - Metropolitan Area Ethernet
MAN - Metropolitan Area Network
Mbps - Megabits per second
MDF - Main Distribution Frame
MDSL - Moderate speed Digital Subscriber Line
MIB - Management Information Base
MMDS - Multichannel Multipoint Distributed Service
MPEG - Motion Picture Experts Group
MPOE - Minimum Point Of Entry
MSO - Multiple System Operator
MTBF - Mean Time Between Failure
MTSO - Mobile Telephone Switching Office
MUX - Multiplexer
N (top)
NAP - Network Access Provider
NAT - Network Address Translation
NDIS - Network Design Interface Specification
NEBS - Network Equipment Building System
NEXT - Near End CrossTalk
NIC - Network Interface Card
NID - Network Interface Device
N-ISDN - Narrowband ISDN
NMS - Network Management System
NSN - Network Service Node
NSP - Network Service Provider
NTE - Network Termination Equipment
NTU - Network Termination Unit
O (top)
OA&M - Operations, Administration, & Maintenance
OC-1 - Optical Carrier, level 1
OC-3 - Optical Carrier, level 3
OC-12 - Optical Carrier, level 12
ONU - Optical Network Unit
OSI - Open Systems Interconnection
P (top)
PBX - Public Branch eXchange
PON - Passive Optical Network
POP - Point Of Presence
POTS - Plain Old Telephone Service
PPP - Point-to-Point Protocol
PPTP - Point-to-Point Tunneling Protocol
PRI - Primary Rate Interface
PSC - Public Service Commission
PSTN - Public Switched Telephone Network
PTO - Public Telephone Operator
PTT - Postal Telephone & Telegraph
PUC - Public Utilities Commission
PVC - Permanent Virtual Circuit
Q (top)
QAM - Quadrature Amplitude Modulation
QoS - Quality of Service
R (top)
RADSL - Rate Adaptive Digital Subscriber Line
RBOC - Regional Bell Operating Company
RFI - Radio Frequency Interference
RMON - Remote Network Monitoring Specification
RSVP - Resource Reservation Protocol
RT - Remote Terminal
RTU - Remote Termination Unit
S (top)
SDH - Synchronous Digital Hierarchy
SDSL - Symmetric Digital Subscriber Line
SIP - SMDS Interface Protocol
SLIP - Serial Line Internet Protocol
SMDS - Switched Multimegabit Data Service
SNA - Systems Network Architecture
SNI - Subscriber Network Interface
SNMP - Simple Network Management Protocol
SOHO - Small Office, Home Office
SONET - Synchronous Optical NETwork
STM - Synchronous Transfer Mode
STM-1 - Synchronous Transport Module-1
STS-1 - Synchronous Transport Signal-1
SU - Service User
SVC - Switched Virtual Circuit
SWC - Service Wire Center
T (top)
TCP/IP - Transmission Control Protocol/Internet Protocol
TDM - Time Division Multiplexing
TIMS - Transmission Impairment Measurement Set
TP - Twisted Pair
TPON - Telephony over Passive Optical Network
U (top)
UADSL - Universal ADSL
UAWG - Universal ADSL Working Group
UBR - Unspecified Bit Rate
UDSL - Universal Digital Subscriber Line
URL - Uniform Resource Locator
UTP - Unshielded Twisted Pair
V (top)
VBR - Variable Bit Rate
VC - Virtual Circuit
VCI - Virtual Channel Identifier
VDSL - Very high data rate Digital Subscriber Line
VF - Voice Frequency
VLAN - Virtual LAN
VLSI - Very Large Scale Integration
VoD - Video on Demand
VP - Virtual Path
VPI - Virtual Path Identifier
VPN - Virtual Private Network
W (top)
WAN - Wide Area Network
WIPO - World Intellectual Property Organization
X (top)
XNS - Xerox Network System
