Method and apparatus for searching a plurality of destination numbers
First Claim
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1. A method for improving call connection to a calling list, comprising the steps of:
- initiating a call to one of a plurality of destination numbers on a calling list;
monitoring inband signals during call setup for an inband signal indicating call setup cannot be completed; and
aborting the call setup if the inband signal indicates the call setup cannot be completed.
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Abstract
A method and apparatus for improving call connection to one of a plurality of destination numbers on a calling list is disclosed. The method involves monitoring the inband signals between an interrogating mobile switching center and a remote node during call setup procedures. An inband monitoring device looks for terminating signals indicating that call setup to the remote nodes will not be completed. Upon detection of such a termination signal, the call setup procedure is immediately discontinued without waiting for expiration of a call answer timeout period.
23 Citations
22 Claims
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1. A method for improving call connection to a calling list, comprising the steps of:
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initiating a call to one of a plurality of destination numbers on a calling list; monitoring inband signals during call setup for an inband signal indicating call setup cannot be completed; and aborting the call setup if the inband signal indicates the call setup cannot be completed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for improving call connection to one of a plurality of destination numbers on a calling list, comprising the steps of:
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actuating an inband signal monitoring device in response to an attempted call setup with one of the plurality of destination numbers; monitoring inband signals during call setup for tones indicating a busy signal, a congestion signal, and a special information signal; and aborting the call setup if any one of the busy signal, congestion signal and special information signal are detected prior to termination of the call setup due to a call answer timeout period. - View Dependent Claims (15, 16, 17)
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18. A system for improving call connection to one of a plurality of destination numbers on a calling list, comprising:
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a switching center for initiating a call setup to the one of the plurality of destination number on the calling list; and means for monitoring an inband signal to the switching center during call setup for a termination signal indicating call setup cannot be completed and terminating the call setup upon detection of the terminating signal, the means for monitoring responsive to initiation of call setup by the switching center. - View Dependent Claims (19, 20, 21, 22)
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Specification