See on-line. Alternate spellings: on-line, online.
Note: These alternate spellings are inconsistent with convention, but are widely used in computer technology.

A low-powered mobile station in the maritime mobile service intended for use for internal communications on board a ship, or between a ship and its lifeboats and liferafts during lifeboat drills or operations, or for communication within a group of vessels being towed or pushed, as well as for line handling and mooring instructions. [NTIA] [RR]

1. In telephony, the condition that exists when an operational telephone, or other user instrument, is not in use.
Note: On-hook originally referred to the storage of an idle telephone receiver, i.e., separate earpiece, on a hook that extended from a vertical post that supported the microphone also. The hook was mechanically connected to a switch that automatically disconnected the… (Read More →)

In telephony, of a circuit, a signal indicating a disconnect, unanswered call, or an idle condition.

A state in which the customer installation (CI) presents a high-resistance path at the network interface. [T
1. Rpt37-1994]

1. Pertaining to the operation of a functional unit when under the direct control of the system with which it is associated.
Note 1: On-line units are available for immediate use on demand by the system without human intervention.
Note 2: On-line units may not be independently operated.
2. Pertaining to equipment that is connected to a system, and is… (Read More →)

A particular form of authentication information, certified by a trusted authority, which may be used for authentication following direct interaction with the authority [10181-2].

[A] cryptosystem in which encryption and decryption are performed in association with the transmitting and receiving functions. [INFOSEC-99]

An extension telephone, PBX station, or key system station located on property that is contiguous with that on which the main telephone, PBX, or key system is located.

Customer-owned metallic or optical-fiber communications transmission lines, installed within or between buildings.
Note: On-premises wiring may consist of horizontal wiring, vertical wiring, and backbone wiring, and may extend from the external network interface to the user work station areas. It includes the total communications wiring to transport current or future data, voice, LAN, and image information.