Shared line appearance across a plurality of switching systems

Details Shared line appearance across a plurality of switching systems Shared line appearance across a plurality of switching systems

H - Electricity

04

Q

H04Q 3/42 (2006.01) H04M 3/42 (2006.01) H04M 9/00 (2006.01) H04Q 3/00 (2006.01) H04M 3/533 (2006.01) H04M 7/00 (2006.01)

Patent

CA 2107754

Allowing a shared line appearance feature to be implemented on a plurality of telephone station sets which are connected to different telecommunication switching systems. The telecommunication switching systems can be interconnected to each other via the public telephone network utilizing standard telecommunication links. A software application program provides a termination point for a directory number that is associated with a shared line appearance. The software application program receives all incoming calls directed to the directory number and determines the operations that should be performed with respect to the telephone station sets terminating the shared line appearance. The software application program directs the incoming calls to the telephone stations sets regardless to which telecommunication system each of the telephone station sets is interconnected. An outgoing call from one of the telephone station sets is switched to the software application program which then switches the outgoing call to thedestination telephone terminal as if the outgoing call had originated at the location of the software application program. With respect to the outgoing call, the software application program also transmits messages to the other telephone station sets terminating the shared line appearance, so that those telephone station sets canindicate that the shared line appearance is busy.

L'invention permet de mettre en oeuvre une fonction de représentation de ligne partagée sur un certain nombre d'appareils téléphoniques connectés à différents systèmes de commutation de télécommunication. Ces systèmes peuvent être interconnectés entre eux sur le réseau téléphonique public au moyen de liaisons de télécommunication ordinaires. Un programme d'application logicielle constitue un point de terminaison pour un numéro d'annuaire associé à une représentation de ligne partagée. Ledit programme reçoit tous les appels d'arrivée destinés au numéro d'annuaire et détermine les opérations à exécuter relativement aux appareils téléphoniques terminant la représentation de ligne partagée. Le programme dirige les appels d'arrivée aux appareils téléphoniques quel que soit le système de télécommunication auquel ils sont connectés. Un appel de départ provenant d'un des appareils téléphoniques est transmis au programme d'application logicielle qui le transmet ensuite au poste téléphonique d'arrivée comme si l'appel provenait de l'emplacement dudit programme. En outre, le programme transmet alors des messages aux autres appareils téléphoniques terminant la représentation de ligne partagée, pour que ces derniers puissent indiquer que la représentation de ligne partagée est occupée.

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