ADSL - Asymmetric Digital Subscriber Line
ANSI - American National Standards Institute
ATM - Asynchronous Transfer Mode
ATU-C - ADSL Termination Unit - Central Office
ATU-R - ADSL Termination Unit - Remote
AWG - American Wire Gauge
BERT - Bit Error Rate Test
bps - Bits Per Second
BRI - Basic Rate Interface
CAP - Carrierless Amplitude and Phase
CATV - Cable TV
CBR - Constant Bit Rate
CCITT - Consultative Committee for International Telegraph and Telephone
CLEC - Competitive Local Exchange Carrier
CO - Central Office
CODEC - Coder/Decoder
CPE - Customer Premise (or Provided) Equipment
CSU - Channel Service Unit
DCE - Data Communication (or Circuit-Terminating) Equipment
DHCP - Dynamic Host Configuration Protocol
DLC - Digital Loop Carrier
DMT - Discrete Multi-tone
DSL - Digital Subscriber Line
DSLAM - Digital Subscriber Line Access Multiplexer
DSP - Digital Signal Processor
DSU - Data Service Unit
DTE - Data Terminal (or Termination) Equipment
EMI - Electromagnetic Induction
ETSI - European Telecommunications Standards Institute
FCC - Federal Communications Commission
FDM - Frequency Division Multiplexing
FEXT - Far-end crosstalk
FTTC - Fiber To The Curb
FTTH - Fiber To The Home
HDSL - High bit-rate Digital Subscriber Line
HFC - Hybrid Fiber-Coax
IEC - Inter-Exchange Carrier
IEEE - Institute of Electrical and Electronics Engineers
IETF - Internet Engineering Task Force
ILEC - Incumbent Local Exchange Carrier
IP - Internet Protocol
ISDL - ISDN Digital Subscriber Line
ISDN - Intergrated Services Digital Network
ISO - International Organization for Standards
ISP - Internet Service Provider
ITU - International Telecommunications Union
IXC - Inter-exchange Carrier
Kb/s - Kilobits Per Second
LADC - Local Area Data Circuit
LADS - Local Area Data Service
LAN - Local Area Network
LATA - Local Access and Transport Area
LEC - Local Exchange Carrier
Mb/s - Megabits Per Second
MDF - Main Distribution Frame
MUX - Multiplexer
MVL - Multiple Virtual Line
NAP - Network Access Provider
NAT - Network Address Translation
NEBS - Network Equipment Building Standards
NEXT - Near-end Crosstalk
NIC - Network Interface Card
NID - Network Interface Device
OPTIS - Overlapped Phase Trellis-coded Interlocking Spectrum
PBX - Public Branch Exchange
PCM - Pulse Code Modulation
POP - Point of Presence
POTS - Plain Old Telephone Service
PPP - Point to Point Protocol
PRI - Primary Rate Interface
PSTN - Public Switched Telephone Network
PTT - Postal, Telegraph and Telephone
PVC - Permanant Virtual Circuit
QAM - Quadrature Amplitude Modulation
QoS - Quality of Service
RADSL - Rate Adaptive Digital Subscriber Line
RBOC - Regional Bell Operating Company
SDSL - Symmetric Digital Subscriber Line
SNR - Signal-to-Noise Ratio
SOHO - Small Office/Home Office
SVC - Switched Virtual Circuit
TCP - Transport Control Protocol
TELCO - Telephone Company
TDM - Time Division Multiplexing
UBR - Unspecified Bit Rate
UDSL - Unidirectional Digital Subscriber Line
UTP - Unshielded Twisted Pair
VBR - Variable Bit Rate
VDSL - Very high bit-rate Digital Subscriber Line
VoIP - Voice over Internet Protocol
VPN - Virtual Private Network
WAN - Wide Area Network
xDSL - (generic) Digital Subscriber Line