VoIP Glossary
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A
ATA: stands for Analog Telephone Adapter also know as VoIP Phone Adapter.
ADSL: Asymmetric Digital Subscriber Line.
B
bandwidth : Using a bandwidth measurement tool you can test your upload and download Internet speed in Kbps, Mbps or Hz depending on the network type you have.
broadband : high speed Internet service. Cable and DSL Internet are among the popular broadband services.
BRI : short for Basic Rate Interface.
C
Cable Internet : High speed Internet access provided over cable television network.
Cable modem : a device used as bridge to connecting to the Internet service provided by cable TV company.
D
Dial-Up Internet : a type of Internet connection established using PSTN line. Maximum speed of 56 Kbps can be achieved with on a dial-up Internet access.
Dial-Up IP-Phone : a type of VoIP hard phone that comes with built-in modem and RJ-11 port for dialing to ISP and for Internet access.
DS : Digital Service
DSL : Digital Subscriber Line. A type of high speed Internet access. DSL is one of the popular digital service, 256 Kbps speed is 4 times faster than a dial-up Internet.
DSL modem : a device used as a bridge to connect to high speed/broadband Internet access.
E
E-911: enhanced 911 emergency service.
encapsulation: the process of network traffic packetizing to transport data, voice and video. Network professionals explain encapsulation as enclosing voice (data) into an envelop and mailing it through postal mail (IP networks).
VoIP Glossary
F
FoIP: stands for Fax over Internet Protocol. The method of sending fax through Internet.
FXO: Foreign Exchange Office is the port that receives the analog telephone line from your phone company (PSTN).
FXS: Foreign Exchange Station is the port where telephone handsets connected.
G
Gateway: A device used for making telephone calls and fax. See VoIP gateway
Gatekeeper: a terminal device that manages other VoIP devices. See VoIP gatekeeper
H
H.323: a standard protocol by ITU (International Telecommunications Union) used in IP Telephony / VoIP technology.
hard phone: VoIP equipment. See VoIP devices.
Hz: short for Hertz.
I
IP: Internet Protocol
IP-PBX: short for Internet Protocol - Private Branch eXchange is VoIP based telephone exchange used by companies. In business telephone systems, IP-PBX can be purchased or hosted by VoIP providers, unlike traditional PBX provided by CLEC/ILEC carriers.
IP telephony: a technology that allows you to make and receive telephone calls within LAN. See VoIP.
ISDN: short for Integrated Services Digital Network.
ISP: Internet Service Provider.
J
Jitter: in IP Telephony/VoIP terminology jitter is a type of packet delay caused by improper queuing, slow or congested Internet network.
VoIP Glossary
K
Kbps: kilobits per second
L
LAN: Local Area Network
LD: Long Distance
M
MAN: Metropolitan Access Network
Mbps: megabits per second
N
NAT: Network Address Translation
NIC: Network Interface Card
O
Online Phone Call : a method of placing telephone call through Internet. See VoIP Phone Service and PC to Phone Calls.
Origination: in IP Telephony/VoIP an origination is a process of taking a call off the Internet or from PSTN lines and sending to the destination (called party) over Internet network by an ITSPs.
OSP: stands for Open Settlement Protocol. A client/server protocol used by Internet service providers to exchange authorization, accounting, and usage information to support IP telephony. Open Settlement Protocol is implemented in voice telephony gateways such as softswitches, H.323 multimedia conferencing gateways, and Session Initiation Protocol (SIP) proxies. Reference Wikipedia.
P
POP : Point of Presence
POTS : Plain Old Telephone Service
PRI : stands for Primary rate interface. In Europe known as E-1 which provides 32 channels/lines. In North America T-1 which provides 24 channels.
PSTN : Public Switched Telephone Network
Q
Q.931: is a type of an ISDN protocol.
QoS: short for Quality of Service generally defined on a VoIP phone service call connection.
QSIG: stands for Q-Signaling.
R
RAS: short for Registration, Admission and Status, is a management protocol tool used for VoIP Gateways and VoIP Gatekeeper endpoints.
Router: a network device that also acts as a hub or switch. See VoIP router - these types of routers provide LAN, WAN, FXS and FXO ports.
RRSV : stands for Resource Reservation Protocol.
RTP : short for Real-Time Transport Protocol.
S
Soft-phone: an application downloaded on computers to enable users to make a phone call through the Internet. See VoIP soft-phone.
SRTP: Secure Real-time Transport Protocol
T
TCP : Transmission control protocol. Often written as TCP/IP.
T1 : a DS type of network which consists of 24 channels with bandwidth of 1.536 Mbps.
U
UDP: User Data-gram Protocol.
VoIP Glossary
V
VoIP : Voice Over Internet protocol, a technology that allows you to make and receive telephone calls over the Internet network. Technically speaking calls made from LAN to WAN and to traditional PSTN or cellular phones. See above IP Telephony.
VoWi-FI : short for Voice over Wi-Fi. VoIP service offered over Wi-Fi. See Wi-Fi below.
W
Wi-Fi : wireless local area network (WLAN) developed by WiFi alliance; an organization that owns WiFi trade mark.
Wi-Fi Phone : a type of cellular phone that enables you to make VoIP calls over Wi-Fi network or hot-spot. See wireless VoIP Phones.
Wi-Max : short for Worldwide Interoperability for Microwave Access. WiMax is broadband wireless faster than WiFi more than six times and can work up to 31 miles.
WWW: World Wide Web
X
XMPP: short or stands for Extensible Messaging and Presence Protocol. It is XML based protocol.
Y
Z
ZRTP : an in-band key exchange protocol for SRTP based based on either the Diffie–Hellman (D–H) or the elliptic curve Diffie–Hellman (ECDH) algorithms, with Man-in-the-Middle protection based on human voice recognition. (Glossary courtesy of ZRTP.org)
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