Special Features:

The joint network node (jnn) facilitates the management of digital groups, trunks, and circuits. It provides the means through which the communications resources at a node can be monitored, controlled, and managed. The the jnn components are housed in a s-250 shelter and extension equipment is housed in user access cases.

Properties:

A telephone office having among its characteristics, switching facility for connecting different types of subscribers, either voice or data. Also provides the necessary control signals allowing interfacing with any other central office within the network. Includes a collection of items, both numerous parallel electronic switching equipment and other electronic equipment. Excludes central office, telephone, dial and central office, telephone, manual.