Apparatus and method for indicating the status of a trunk in the guide of a national exchange

摘要

end. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a public switched telephone system, and more particularly, to an apparatus and method for indicating a state of a relay trunk when a self-originated call is relayed using a guide.;I. SUMMARY OF THE INVENTION The present invention has a problem in that since the guide can not know the trunk state information in the public switchboard, the conventional guide-line function has a problem in that a worker scans the relay lines and finds an empty relay line.;All. DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention: In order to solve the above-mentioned problems, the present invention provides an apparatus for indicating a relay trunk state in a guide of a public switching center, A database for storing state data of a relay trunk transmitted from the public switching center in the guide zone, and a database connected to each of the databases, wherein a local call relay request is transmitted from the local station to the local station, And a plurality of PCs (PCs) for reading the status of the relay trunks of the public exchange exchanges stored in the database and displaying the vacant relay trunks on the monitor.;la. An important application of the invention is: an apparatus and method for indicating trunk status in a guide station of a public switching center.