Improved method and apparatus for searching a plurality of...

Details Improved method and apparatus for searching a plurality of... Improved method and apparatus for searching a plurality of...

H - Electricity

04

M

H04M 3/46 (2006.01) H04M 1/274 (2006.01) H04Q 7/38 (2006.01) H04M 3/42 (2006.01)

Patent

CA 2283144

A method and apparatus for improving call connection to one of a plurality of destination numbers (30) on a calling list (25) is disclosed. The method involves monitoring the inband signals between an interrogating mobile switching center (15) and a remote node (14) during call setup procedures. An inband monitoring device (60) looks for terminating signals indicating that call setup to the remote nodes (40) will not be completed. Such signals would include the tones associated with a busy signal, a call congestion signal or special information tones. Upon detection of such a termination signal, the call setup procedure is immediately discontinued without waiting for expiration of a call answer timeout period.

Procédé et appareil permettant d'améliorer l'établissement d'une liaison avec un numéro d'appel (30) pris parmi une pluralité de numéros d'appel figurant sur une liste d'appel (25). Le procédé consiste à surveiller les signaux intrabande entre un central mobile (15) interrogateur et un noeud éloigné (14) pendant des procédures d'établissement de liaison. Un dispositif (60) de surveillance intrabande recherche des signaux de fin de communication indiquant que l'établissement d'appel vers les noeuds éloignés (40) n'ira pas à son terme. Ces signaux devraient comprendre les tonalités associées à un signal "occupé", un signal de réseau saturé ou des tonalités d'informations spécifiques. La détection d'un tel signal de fin de communication a pour effet d'interrompre immédiatement l'établissement de la liaison sans attendre la fin d'une période d'attente de réponse d'appel.

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