Virtual wide area centrex

H - Electricity – 04 – Q

Patent

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Details

H04Q 3/76 (2006.01) H04M 3/42 (2006.01) H04Q 3/58 (2006.01) H04M 7/00 (2006.01)

Patent

CA 2174994

A method and system is disclosed for providing wide area centrex services to a telephone network having a number of telephone switching offices equipped with SSPs (Service Switching Points) operating with AIN (Advanced Intelligent Network) application software. The network has a serving central office for providing centrex functionality to a number of customer sites, each served by separate central offices. A virtual telephone number is assigned to each station used at the customer sites. Each central office is connected to a service control point (SCP) having a number translation database containing the virtual number assignment. A dialed virtual number is translated to a real number to determine how to route a call to any one of the customer sites served with centrex type services and the real number of a calling station is then translated to a virtual number such that centrex type features can be maintained at each customer site.

Méthode et système permettant de fournir des services centrex longue portée à un réseau téléphonique ayant un certain nombre de centres de commutation dotés de SPP (points de commutation de services) utilisant un logiciel d'application AIN (réseau intelligent de pointe). Le réseau a un central serveur offrant la fonctionnalité centrex à un certain nombre de sites clients servis respectivement par des centraux distincts. Un numéro de téléphone virtuel est affecté à chaque station utilisé aux sites clients. Chaque central est relié à un point de commande de services (SCP) comportant une base de données de traduction de numéros contenant des affectations de numéros virtuels. Un numéro virtuel composé est traduit en un numéro réel afin de déterminer comment acheminer un appel vers n'importe quel des sites clients recevant des services de type centrex et le numéro réel d'une station appelante est ensuite traduit en un numéro virtuel pour que les fonctions de type centrex puissent être maintenues à chaque site client.

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