In network topology, a node connected to one and only one yybranch. Synonym peripheral node.

The property of a system, subsystem, equipment, or process that enables it to continue to function within specified performance limits for an extended period of time, usually months, despite a severe natural or man-made disturbance, such as a nuclear attack, or a loss of external logistic or utility support.
Note: Endurability is not compromised by temporary failures when the local… (Read More →)

See endurability.

Synonym orderwire circuit.

Synonym orderwire circuit.

A system that establishes connections between customer installations (CIs) and constituent public service access points (PSAPs), provides automatic location information (ALI), and has provisions for selective routing. [T1.414-1998]

Service, offered over commercial carrier transmission facilities used in interstate communications, that employs computer processing applications that act on the format, content, code, protocol, or similar aspects of the subscriber's transmitted information; provides the subscriber with additional, different, or restructured information; or involves subscriber interaction with stored information.

A company that provides, via a connection to an exchange carrier, services that add value to voice and/or data information. [T1.251-1996]

Synonym [in ITU-T usage] improved-definition television.

Abbreviation for enquiry character.