Isdn compound switching system

Details Isdn compound switching system Isdn compound switching system

H - Electricity

04

L

354/222

H04L 29/14 (2006.01) H04L 1/22 (2006.01) H04L 12/52 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2028141

For example, in order to simplify the backup system of an on-line service system, according to the invention, a host computer, a communication manager, and a number of ISDN compound switching units (I-SW) are installed on the part of a central controller unit. In addition, a terminal control unit and an I-SW remote manager are installed at the central controller unit or each of specific business offices. A plurality of ISDN compound switching units, a network terminal equipment, a digital service unit (DSU), a modem M, a terminal control unit, a plurality of terminal equipment, and automatic equipment, are installed in each business office. Using private lines, the communication manager unit is connected to the ISDN com-pound switching units of respective business offices via the DSU and modem (M). The communication manager unit (CCU) is connected to the ISDN network via the ISDN compound switching units and the network terminal equipment. The ISDN compound switching units in respective business offices can be connected to the ISDN network via the ISDN lines. In the event that any failure arises and the backup function is needed, the ISDN compound switching units are switched over to the connection with the ISDN line under the control of the I-SW remote manager on the part of the central controller unit or the business office demanding the backup operation.

Afin de faciliter le soutien d'un système en ligne, l'unité centrale comprend un ordinateur serveur, un dispositif de commande des communications et un commutateur composite RNIS (I-SW). En outre, une centrale de vente particulière est équipée d'un dispositif de commande des terminaux et d'un dispositif de commande à distance du I-SW. Chaque bureau de vente est équipé d'un commutateur composite RNIS, d'un terminal de réseau, d'une unité de service numérisé (USN), d'un modem M, d'un dispositif de commande de terminaux, de terminaux et de machines automatiques. Le dispositif de commande des communications (CCU) de la centrale est connecté aux commutateurs composites RNIS dans les bureaux de vente par un circuit exclusif via des USNs et des modems. En outre, le CCU est connecté à un réseau de circuit RNIS via un commutateur composite RNIS et des équipements de terminaison du réseau. Les commutateurs composites RNIS dans les bureaux de vente peuvent être connectés au réseau RNIS via le circuit RNIS sous la commande du dispositif de commande à distance du I-SW de la centrale ou du bureau de vente, si nécessaire, par exemple en cas de panne.

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