At&t Bell Laboratories

Larry W Kirsch

Thomas Wayne Anderson

Dario L Parola

Elliott Baral

Ronald B Martin

David A Redberg

David S Isenberg

Bernard W Fecht

Ronald S Byrd

Frederick W Korty

A network monitor and associated control system is provided to monitor a toll network for customer signaling. A multi-tone signal processor and associated control is provided such that when signaling is detected, such signaling is validated against a provisioned list. A valid signal is reported to a central control of the network switch, which takes action in response to the signal.

Method and apparatus for monitoring a network for customer signaling

This invention relates to a method and apparatus for providing point-to-point line service by providing a switched communication circuit only whenever either terminal of the private line service lifts its receiver. In a departure from the prior art, and in order to ensure that no other stations can get access to the private line terminals, the service is provided by assigning both terminals to a common software defined network, and by routing the call through the software defined network using a non-dialable routing number derived from the identity of a calling station. Whenever either terminal lifts its receiver, a connection is set up within the software defined network; this prevents callers from outside the software defined network from accessing either terminal. Alternatively, an ingress switch of a public switched network can directly provide a non-dialable routing number for routing a call from a station that has gone off-hook to a predetermined destination identified in such a way that it cannot be reached by dialing a call. Advantageously, fully private line service is provided without requiring dedicated facilities.

Virtual private line service

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Bolingbrook, IL, United States of America

Larry W Kirsch