Multiplex communications – Wide area network – Packet switching
Patent
1992-09-03
1994-05-03
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 851, 370 941, 370 97, 3701101, H04J 306
Patent
active
053094409
ABSTRACT:
An ISDN-user-network interface system comprising an interface buffer and an interface adapter. The interface buffer provided between an ISDN network terminal equipment and a terminal equipment to receive an up-signal frame transmitted from said terminal equipment to said network terminal equipment, to store said up-signal frame, and to transmit said stored up-signal frame at a timing when said network terminal equipment is capable of detecting the synchronization of said up-signal frame. The interface adapter provided between said ISDN network terminal equipment and said terminal equipment, to receive an up-signal frame transmitted from said terminal equipment to said network terminal equipment, to detect D-channel bits of said up-signal frame, to transmit said up-signal frame to said network terminal equipment, to copy said detected D-channel bits into echo channel bits of a down-signal frame from said net-work terminal equipment to said terminal equipment received immediately after the transmission of said up-signal frame, and to transmit said down-signal frame to said terminal equipment.
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patent: 4835769 (1989-05-01), Donaghue, Jr. et al.
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patent: 5204860 (1993-04-01), Sparks
Fujioka Masanobu
Kikuta Hiroyuki
Nakamura Hajime
Watanabe Fumio
Blum Russell W.
Burns Robert E.
Kokusai Denshin Denwa Kabushiki Kaisha
Lobato Emmanuel J.
Olms Douglas W.
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