A telecommunications system service condition in which a user is completely deprived of service by the system.
Note: For a particular system or a given situation, an outage may be a service condition that is below a defined system operational threshold, i.e., below a threshold of acceptable performance. See outage threshold.

That period of time between the onset of an outage and the restoration of service.

The probability that an outage will occur within a specified time period.

The sum of all the outage durations divided by the time period of measurement.

See outage.

For a supported performance parameter of a system, the value that establishes the minimum performance level at which the system is considered to remain in an operational state.
Note: A measured parameter value better than the outage threshold indicates that the system is in a system operational state.

The ability of a user to originate data calls via an ISDN. [T1.615-1992]

Multicast does not use standard destination based routing and instead relies on group membership protocols such as IGMP to help build the multicast distribution tree. Interfaces that have joined the multicast group are added to the OIF table in relation to the respective multicast group. Once added to the table, the network element will create a copy of each multicast… (Read More →)

The process of transmitting address information over a trunk from one switching center or switchboard to another.

1. Information retrieved from a functional unit or from a network, usually after some processing.
2. An output state, or sequence of states.
3. Pertaining to a device, process, or channel involved in the production of data by a computer or by any of its components.
4. Information that has been exported by a TCB [TCSEC].