Method and apparatus for monitoring status of speech connection between central office lines

摘要

A method and apparatus for monitoring the status of a speech connection between central office lines in a private exchange system may be constructed with a controlling unit for controlling a connection between a network and a corresponding central office line to perform a speech connection between first and second central office lines; a line interface unit for interfacing the first and second central office lines under the control of the controlling unit; a network unit for connecting the first and second central office lines to each other under the connection control of the controlling unit; and a speech monitoring the status of unit for monitoring the speech connection during the connection of the first and second central office lines, by directly detecting the presence or absence of a signal from the first and second central office lines inputted thereto through the network unit without interrupting the connection between the first and second central office lines and for outputting the speech connection status to the controlling unit such that the first and second central office lines are disconnected in the absence of the signal for a predetermined period of time.