ISDN subscriber matching device in ISDN exchange

摘要

The ISDN exchange of each country implements the Integrated Information Network (ISDN) function that provides services to the subscriber, and the structure of the subscriber-mating device of the ISDN exchange that implements the integrated information network function adopts the respective structure according to the ISDN exchange However, it affects performance and price depending on the structure of the ISDN subscriber matching device. Therefore, in order to realize the ISDN function to provide service to the ISDN subscriber in the TDX-10 electronic switching system, the ISDN subscriber unit structure was invented considering system performance, price, and ease of development.;The present invention is a structure for processing a layer 1, a layer 2 and a layer 3 in an open system layer structure and processes the layer 1 ) Is a structure in which each subscriber performs in a card, and a layer 2 is collected and processed in units of a subscriber module. Therefore, in terms of the overall structure of the system, Layer 2 is distributed in units of modules, and the structure is concentrated in the module of the subscriber.