METHOD FOR TRANSFERING EXTERNAL CALL IN BUSYLINE STATE WITH EXTENSION LINE IN PRIVATE BRANCH EXCHANGE SYSTEM

摘要

end. The technical field to which the invention described in the claims belongs;The present invention relates to a method of converting a trunk line call in a private exchange.;I. The technical problem to be solved by the invention;In the case of switching a trunk line call that is in communication with one station to another station in a private exchange, if the receiver of the converted station is busy or there is no answer, the trunk line call is switched.;All. Summary of Solution of the Invention;An extension in a private exchange is performed by a station waiting function implemented in a private exchange so that a trunk line call held and held by an extension subscribed to the exchange is held and held by another extension subscribed to the exchange. It is characterized by a method of switching a CO line in a call.;la. Important uses of the invention;The present invention is used in a private exchange installed in a place that frequently connects external telephones, such as hotels.