ADSLF |
ADSL Forum, a group of several hundred companies involved in some way in DSL technology, formed to identify and solve technical and market problems and issues and to encourage standards, using a generic approach. |
CAP |
means one of two things:
- Carrier-less Amplitude/Phase modulation, one of the line codes, or modulation systems, used for xDSL.
- Competitive Access Provider, company that competes with traditional phone companies. Usually means the same as CLEC.
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CLEC |
Competitive Local Exchange Carrier, company that typically leases capacity from the local telephone company and resells it. In some cases these companies have networks of their own, such as in large cities. |
DMT |
Discrete Multi-Tone, one of the line codes, or modulation systems, in which incoming data are spread over a number of channels of the available spectrum in an efficient way. |
DSLAM |
Digital Subscriber Line Access Multiplexer, the piece of DSL equipment at the telephone company end of the phone line, usually in a central office. |
ILEC |
Incumbent Local Exchange Carrier, such as any of the regional Bell operating companies or GTE. |
ISDN |
Integrated Services Digital Network, an alternative method to simultaneously carry voice, data and other traffic, using the switched telephone network. |
ISP |
Internet Service Provider, company which provides connection to the Internet, typically piggybacking on the local telephone company's wires. |
IXC |
Inter-Exchange Carrier, typically a long-distance telephone company. |
LAN |
Local Area Network, a wiring system to connect computers together within a company, a building or other local area. |
LEC |
Local Exchange Carrier of whatever variety. It should be noted that there are more than 1000 such carriers in the USA in addition to the five RBOCs and GTE. |
PSTN |
Public Switched Telephone Network, over which voice traffic moves. |
RBOC |
Regional Bell Operating Company, of which there are five: Ameritech, Bell Atlantic, BellSouth, SBC Communications and U S West. |
STP |
Shielded Twisted Pair copper wires, more common in Europe. Each pair may be separately shielded, or the entire cable or sections of the cable may be shielded to protect against outside interference. |
TP |
Twisted Pair copper wires, where the twist provides protection against crosstalk or other interference. |
UAWG |
Universal ADSL Working Group, a group formed in late 1997, and made up of Intel, Compaq, Microsoft, the five RBOCs and others, to move a specific version of xDSL technology to market quickly. |
UTP |
Unshielded Twisted Pair copper wires, typically used in the USA. |
VLSI |
Very Large Scale Integration, a high-speed chip technology. |