Glossary - 0 - 9

0 - 9

*69

Identifies the last missed incoming call. Learn more.

10BaseT

An Ethernet LAN that works on twisted-pair wiring that is similar to telephone cable.

2B1Q (Two Binary, One Quaternary)

See Two Binary, One Quaternary.

2-wire

Two-wire loops support loop-start, ground-start, loop reverse-battery or customer-provided in band signaling.

4-wire

Four-wire loops support duplex signaling in addition to all of the same capabilities as 2-wire loops.

5ESS

A digital central office switching system made by Alcatel-Lucent, typically used to serve local subscribers.

500 Access Service

Telephone service using a non-geographic area code that allows the customer to define a sequence of telephone numbers for forwarding calls to him.

56 Kbps

The fastest modem speed supported by a dial up modem.

64 Kbps

The standard speed for a DDS private line digital service.

800 Number Portability

Allows an end user to retain a given 800 telephone number when changing to another long distance carrier.

800 Service

Also known as 'WATS' service (Wide Area Telecommunications Service), uses 800 or 888 as prefix and provides toll free service to the user dialing the number.

911 Service

A universal telephone number that gives the public direct access to the Public Safety Answering Point for emergency calls. Basic 911 service collects 9-1-1 calls from one or more local exchange switches that serve a geographic area, and sends each call to the appropriate designated authority. Also known as E-911 service.

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