An arrangement in which switching for a private network is provided by one or more common control switching systems.
Note: The switching systems may be shared by several private networks and also may be shared with the public telephone networks.

An automatic switching system that makes use of common equipment to establish a connection.
Note: The common equipment then becomes available to establish other connections.

Equipment used by more than one system, subsystem, component, or other equipment, such as a channel or switch.

[In security,] one of a family of devices developed to read-in, transfer, or store key. [INFOSEC-99]

See CGI.

A protocol used by an application process to exchange information and commands for the purpose of managing remote computer and communications resources.

A service that specifies the service interface to the Common Management Information Protocol (CMIP).
Note: To transfer management information between open systems using CMIS/CMIP, peer connections, i.e., associations, must be established. This requires the establishment of an Application Layer association, a Session Layer connection, a Transport Layer connection, and, depending on supporting communications technology, Network Layer and Link Layer connections.

A return path that is common to two or more circuits and that serves to return currents to their source or to ground.

In a line or circuit, the dc potential difference between ground and the common return.

A trunk group between exchange carrier switches which transports access traffic for numerous interexchange carriers concurrently and may also carry exchange carrier (EC) traffic. [T
1. Rpt 11-1991]