Facility and method for d channel packet switching

Details Facility and method for d channel packet switching Facility and method for d channel packet switching

H - Electricity

04

Q

H04Q 3/42 (2006.01) H04L 12/56 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2061897

For packet-data switching in the ISDN D channel through a digital exchange, the need for a costly frame handler for processing OSI Layer 2 and 3 functions is to be eliminated. To do this, in response to destination information in the SET UP message, an OSI Layer 3 control unit (SE3) establishes a connection between the two OSI Layer 2 control units (SE1, SE2) of the exchange (VST), to which the data terminals (DEE1, DEE2) are connectable. Direct packet-data transfer can then take place between the OSI Layer 2 control units without further partici- pation of the Layer 3 control unit.

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