Packet switching system

Details Packet switching system Packet switching system

1990-08-31

1993-01-19

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 941, 3701101, H04L 1256

Patent

active

051811995

ABSTRACT:
A private branch exchange having a comparatively small number of ISDN circuits, in the circuit interface a table is provided for the purpose of conversion between a logical channel lying between ISDN terminal equipment and the private branch exchange and one lying between the private branch exchange and an ISDN network. Such a private branch exchange refers to this table to recognize the correspondence of a user packet between ISDN terminal equipment and the private branch exchange to one between the private branch exchange and an ISDN network in order to perform packet switching on the D-channel. The use of this construction eliminates the need of any packet switching hardware, packet switching transmission line and high speed transmission line for communication between divided processors. Therefore, packet switching on the D-channel is possible without hampering the circuit switching performance of current circuit switching equipment.

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patent: 5067125 (1991-11-01), Tsuchida
Kazuo Tuzuki et al., "Packet Switch Configuration in the ISDN Switching", Jul. 21, 1988, pp. 71-75.
Hiromasa Ikeda et al., "Network Systems for ISDN", Aug. 22, 1987, pp. 967-975.

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