A

ACELP
Algebraic Code-Excited Linear Prediction

ACK
Acknowledgement

ADPCM
Adaptive Differential Pulse Code Modulation

Amplification
Boosting of signal strength

Analog
Variable signals across an infinite set of values

ANSI
American National Standards Institute

API
Application Programming Interface

ARP
Address Resolution Protocol

ATM
Asynchronous Transfer Mode

Attenuation
Loss in signal strength

B

Bandwidth
The width of the passband used to transmit a signal

Baseband
Signals pulsed directly without frequency division

Baud
Signaling rate

Broadband
Signals pulsed using some form of frequency division multiplexing

Broadcast
Transmit to all members of a group

C

Checksum
Sum of a group of digits for error checking

CIR
Committed Information Rate

CO
Central Office

CODEC
Coder/decoder

Companding
Compressing/expanding

COS
Class of Service

CS-ACELP
Conjugated Structure Algebraic Code-Excited Linear Prediction

CSMA/CD
Carrier Sense Multiple Access with Collision Detection

D

DDP
Datagram Delivery Protocol

DHCP
Dynamic Host Configuration Protocol

DiffServ
Differentiated Services

Digital
Discrete signals across a predefined set of values

DNS
Domain Name System

DoS
Denial of Service

DSL
Digital Subscriber Line

DSP
Digital Signal Processor

DTMF
Dual Tone Multi-Frequency

F

FCC
Federal Communications Commission

FTP
File Transfer Protocol

Full Duplex
Two-way

H

Half Duplex
Alternating two-way

HostID
Host Identifier

HTTP
Hypertext Transfer Protocol

I

ICMP
Internet Control Message Protocol

IEC
InterExchange Carrier

IEEE
Institute of Electrical and Electronics Engineers

IETF
Internet Engineering Task Force

IHL
Internet Header Length

IP
Internet Protocol

IPX
Internetwork Packet Exchange

ISDN
Integrated Services Digital Network

ISOC
Internet Society

ISP
Internet Service Provider

ISUP
Integrated Services Digital Network User Part

ITSP
Internet Telephony Service Provider

ITU-T
International Telecommunication Union-Telecommunication Standardization Sector

ITXC
Internet Telephony Exchange Carrier

IXC
InterExchange Carrier

L

LAN
Local Area Network

LD-CELP
Low Delay Code-Excited Linear Prediction

LEC
Local Exchange Carrier

LSR
Label Switching Router

M

MEGACO
Media Gateway Control

MF
Multi-Frequency

MGC
Media Gateway Controller

MGCP
Media Gateway Control Protocol

MOS
Mean Opinion Score

MPEG
Moving Pictures Experts Group

MPLS
Multi-Protocol Label Switching

MPMLQ
Multi-Pulse Maximum Likelihood Quantization

N

NAT
Network Address Translation

NetID
Network Identifier

O

Octet
Eight bits of data

OS
Operating System

OSI
Open Systems Interconnection

OSPF
Open Shortest Path First

P

Padding
Fill characters

PAM
Pulse Amplitude Modulation

Passband
The range of frequencies used to transmit a signal

PBX
Private Branch Exchange

PCM
Pulse Code Modulation

PING
Packet Internet Groper written by Mike Muuss

POP
Point of Presence

Port
A logical point of connection

POTS
Plain Old Telephone Service

PPP
Point-to-Point Protocol

PSTN
Public Switched Telephone Network

Q

QoS
Quality of Service

Quantize
Encode a PAM signal into a PCM signal

R

RAS
Registration, Admission, and Status

RFCv
Request for Comment

RIP
Routing Information Protocol

Routing
Selecting an appropriate path for a message

RSVP
Resource Reservation Protocol

RTCP
Real Time Control Protocol

RTP
Real Time Transport Protocol

S

SAP
Session Announcement Protocol

SDH
Synchronous Digital Hierarchy

SDP
Session Description Protocol

SGCP
Simple Gateway Control Protocol

Simplex
One way

SIP
Session Initiation Protocol

SLA
Service Level Agreement

SLIP
Serial Line Internet Protocol

SMTP
Simple Mail Transfer Protocol

S/N
Signal-to-Noise ratio

SNA
Systems Network Architecture

SNMP
Simple Network Management Protocol

SS7
Signaling System 7

SSH
Secure Shell

Switching
Placing temporary links between connections

SYN
Synchronize Sequence Number

T

TCP
Transmission Control Protocol

TCP/IP
Transmission Control Protocol/Internet Protocol

TDM
Time Division Multiplexing

TIA
Telecommunications Industries Association

TSAPI
Transport Service Access Point Identifier

U

UDP
User Datagram Protocol

URL
Uniform Resource Locater

V

VoIP
Voice over IP

VPN
Virtual Private Network

W

WAN
Wide Area Network

WI-FI
Wireless Fidelity

WWW
World Wide Web

X

XML
Extensible Markup Language