Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
2005-04-05
2005-04-05
Ho, Duc (Department: 2665)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
C370S359000, C370S467000
Reexamination Certificate
active
06876624
ABSTRACT:
A multiplex conversion unit is configured with those functions required for a specific network to which it is more economically applicable. Each OC-12IF circuit pack includes a switch for performing time slot assignment (TSA) between a plurality of high-speed transmission lines and at least a low-speed transmission line. An ADM circuit pack includes a switch for performing time slot interchange (TSI) between the high-speed transmission lines and the low-speed transmission line. In an application to a network requiring the TSI function, the switch of the OC-12IF circuit pack performs only the add/drop multiplex (ADM) operation between the signals input/output by the high-speed transmission lines and the ADM circuit pack, and the switch on the ADM circuit pack performs the TSI operation. In an application not requiring the TSI, the TSA operation is performed using a THRU circuit pack.
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Teranishi and Kitamura:Design of Digital Network Transmission Facilities,The Denki Tsushin Kyokai, Aug. 10, 1984, pp. 142-149 Group, ASCI Corp.
Ashi Yoshihiro
Fujita Hiroyuki
Hamaguchi Naohisa
Hitachi , Ltd.
Ho Duc
Kenyon & Kenyon
Nguyen Phuongchau Ba
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