Method for providing outgoing call reservation service in exchange system
First Claim
1. A method for making an outgoing call reservation in an exchange system, comprising the steps of:
- (a) determining whether there is an input of the outgoing call reservation request from a subscriber of the exchange system, when a specified called party is in a busy state;
(b) if the outgoing call reservation request is input from the subscriber, making a re-dialing to a telephone number of the specified called party repeatedly by a predetermined times of retries, concurrently using a plurality of idle central office lines assigned to a redial sub-group, until a connection to the called party is successfully established via one of the central office lines of said redial sub-group; and
(c) if there is any central office line of the redial sub-group connected to the called party according to the re-dialing on the outgoing call, connecting the corresponding central office line to the subscriber of the exchange system to establish a speech channel.
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Accused Products
Abstract
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.
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Citations
9 Claims
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1. A method for making an outgoing call reservation in an exchange system, comprising the steps of:
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(a) determining whether there is an input of the outgoing call reservation request from a subscriber of the exchange system, when a specified called party is in a busy state;
(b) if the outgoing call reservation request is input from the subscriber, making a re-dialing to a telephone number of the specified called party repeatedly by a predetermined times of retries, concurrently using a plurality of idle central office lines assigned to a redial sub-group, until a connection to the called party is successfully established via one of the central office lines of said redial sub-group; and
(c) if there is any central office line of the redial sub-group connected to the called party according to the re-dialing on the outgoing call, connecting the corresponding central office line to the subscriber of the exchange system to establish a speech channel. - View Dependent Claims (2, 3, 4, 5)
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6. A method for re-dialing a called party, having a busy state, from a calling subscriber of an exchange system, comprising the steps of:
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detecting input of a call reservation by the calling subscriber;
concurrently re-dialing the called party over a plurality of available central office lines;
detecting when one of said central office lines connects to said called party;
terminating the re-dialing over the remaining plurality of available central office lines when one of said central office lines connects to said called party;
connecting said one of said central office lines to said calling subscriber. - View Dependent Claims (7, 8, 9)
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Specification