Multiplex communications – Wide area network – Packet switching
Patent
1990-07-12
1992-11-17
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 60, 370 941, H04G 1104, H04J 324
Patent
active
051649373
ABSTRACT:
A method and system are provided for concentrating calls for a packet switching system in a hierarchical communication network. A plurality of terminals communicate with an associated plurality of packet concentrators that, in turn, communicate with switching equipment. The system and method comprise initiating a call at a call terminal to be communicated to the packet concentrator and identifying the call terminal by associating a line number communicating the terminal with the concentrator with a first logical channel number for communication from the packet concentrator to the switching equipment. The logic channel number is recorded in association with the first number line at the packet concentrator whereby call communication back to the call terminal can be made on the proper line number by relating the line number with the logic channel line of the call and thereby avoiding the need to switch logic channels between the concentrator and the switching equipment to avoid costly call processing at the concentrator. Further benefits provided by executing of the general call processing at the switching equipment including tariff control.
REFERENCES:
patent: 4964119 (1990-10-01), Endo et al.
CCITT Red Book X.25, vol. VIII, Data Communication Networks Interfaces, Geneva 1985, ISBN 92-61-02321-5, pp. 109-111.
CCITT Red Book X.75, vol. VIII, Data Communication Networks Transmission, Signalling and Switching, Network Aspects, Maintenance and Administrative Arrangements, Geneva 1985, pp. 152-154.
Packet Switching Technology and Its Application, pp. 88-89 and 100-105.
IEICE Technical Report SSE88-56, "A Memory Switch Architecture for ATM Switching Network", by Noboru Endo et al., pp. 37-42.
Kunimoto Masao
Sakurai Yoshito
Takase Akihiko
Tanabe Shirou
Chin Wellington
Hitachi , Ltd.
Olms Douglas W.
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