Master-slave microprocessor control circuit
Method and a system for transmitting alarms
Method and apparatus for communications monitoring
Method and apparatus for detecting and reporting a defective tel
Method and apparatus for gradual application of a hitless...
Method and apparatus for gradual application of a hitless...
Method and apparatus for improving telecommunications system per
Method and apparatus for monitoring selected telecommunications
Method and apparatus for obtaining telephone status over a...
Method and apparatus for screening telephone calls in response t
Method and apparatus for surveillance of voice over internet...
Method and apparatus for tapping control in an electronic switch
Method and devices for monitoring subscribers of a...
Method and equipment for intercepting telephone calls
Method and system for calculating the estimated time of...
Method and system in telecommunications system
Method and system of providing cataloging and detecting...
Method for automatically tracing interface for exchange and...
Method for monitoring a subscriber of an intelligent network
Method for monitoring incoming calls to a user's premises on a p