Method for providing outgoing call reservation service in exchange system

摘要

A method for carrying out an outgoing call reservation service, method comprises the steps of determining whether there is an input of the outgoing call reservation request from a calling subscriber of an exchange system, when a called party is determined to be in a busy state; concurrently re-dialing the called party over a plurality of available central office lines; detecting when one of said central office lines connects to the called party; terminating the re-dialing over the remaining plurality of available central office lines when one of the central office lines connects to the called party; and connecting the central office line that made the connection to the called party to the calling subscriber.