Multiplex communications – Wide area network – Packet switching
Patent
1994-09-01
1996-03-19
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 601, H04J 116, H04L 1256
Patent
active
055008518
ABSTRACT:
An ATM exchanger includes a plurality of switch units connected in multiple stages, in which a circuit is provided for writing a test cell pattern into and reading it from a buffer memory of each switch unit in accordance with an instruction from a controller, so that the test cell read from the buffer memory can be transferred appropriately to the controller.
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Asano Kenichi
Horie Nobuhiro
Kozaki Takahiko
Hitachi , Ltd.
Hitachi ULSI Engineering Corp.
Nguyen Chau T.
Olms Douglas W.
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