1
Satoshi Kakuma, Shuji Yoshimura, Kazuo Hajikano, Masami Murayama, Yuzo Okuyama: Procedure for switching-over systems. Fujitsu, January 30, 1996: US05488606 (51 worldwide citation)

An ATM (asynchronous transfer mode) exchange has a buffer for system #0 and a buffer for system #1 providing P-MEM's for storing data including an A bit and for a VCI/VPI currently in use is set to "1'. Upon detecting a switchover between the systems, every B bit is reset to "0". When the exchange w ...


2
Yuzo Okuyama, Satoshi Kakuma, Shiro Uriu, Kazuo Hajikano: Preset virtual path determining method and device in ATM exchange system. Fujitsu, Helfgott & Karas PC, October 7, 1997: US05675587 (49 worldwide citation)

A test cell generating section periodically generates a pass determining test cell at preset timing, multiplexes them with user cells from a user line interface, and transmits the result of multiplexing to an ATM exchange. When no user cell is supplied from the user line interface, the test cell gen ...


3
Yoshihiro Watanabe, Satoshi Kakuma, Sumie Morita, Yuzo Okuyama, Kenichi Okabe: System of controlling miscellaneous means associated with exchange. Fujitus, October 22, 1996: US05568479 (44 worldwide citation)

The present invention relates to a system for controlling a miscellaneous device such as a remote device associated with an exchange which handles a fixed length cell with a control field and an information field. The object of the invention is to offer a system where an exchange can control a misce ...


4
Mikio Nakayama, Tetsuo Tachibana, Youzou Iketani, Yuzo Okuyama, Satoshi Kakuma: Interface device between a network and an exchange for assembling fixed-length cell and transmitting the same. Fujitsu, September 10, 1996: US05555261 (22 worldwide citation)

An internal timing information producing portion produces internal timing information IRTS1 to IRTS4 which is the timing information on a data reception clock by using a network clock C.sub.N and the data reception clock C.sub.RU. A calculator calculates the difference between the internal timing in ...


5
Mikio Nakayama, Tetsuo Tachibana, Youzou Iketani, Yuzo Okuyama, Satoshi Makuma: Interface device. Fujitsu, Helfgott & Karas P C, July 7, 1998: US05778001 (18 worldwide citation)

An internal timing information producing portion produces internal timing information IRTS1 to IRTS4 which is the timing information on a data reception clock by using a network clock C.sub.N and the data reception clock C.sub.RU. A calculator calculates the difference between the internal timing in ...


6
Jyoei Kamoi, Tomoyuki Yamaguchi, Mikio Nakayama, Yuzo Okuyama: Line multiplexing system. Fujitsu, Helfgott & Karas PC, February 15, 2000: US06026098 (16 worldwide citation)

A plurality of input lines are respectively connected to separate multiplexing units that are connected in cascade by cascading lines. Select signals are transferred in parallel with fixed length packets over the cascading lines. Each separate multiplexing unit is responsive to a select signal recei ...


7
Yuzo Okuyama, Naotoshi Watanabe: Traffic control apparatus and method thereof. Fujitsu, Katten Muchin Zavis Rosenman, September 30, 2003: US06628614 (10 worldwide citation)

A UPC process unit judges whether an arrived cell conforms to a declared parameter. When receiving a cell which is transmitted by a GFR service, a frame process unit modifies the judgment result of the UPC process unit taking an AAL5 frame into consideration. A cell process unit discards the arrived ...


8
Yuzo Okuyama, Satoshi Kakuma, Yasunori Tonooka, Megumi Shibata: Message information terminating system. Fujitsu, October 3, 1995: US05455824 (7 worldwide citation)

A message information terminating system in a switching center is connected to a plurality of remote stations by Derived Data Link interfaces and includes transmission lines connected to the same data terminal unit of the switching center, for transmitting message information containing various info ...


9
Yuzo Okuyama, Kazuo Sato, Yamato Tachibana, Ryuhei Motono, Kazuo Takeoka: HDB3 code violation detector. Fujitsu, Staas & Halsey, February 8, 1994: US05285459 (4 worldwide citation)

An HDB3 code violation detector includes a converting part for receiving positive polarity data and negative polarity data from a PCM line and for converting an HDB3 code received via the PCM line into an NRZ signal, and a first judging part receiving the positive polarity data, the negative polarit ...


10
Yuzo Okuyama, Satoshi Kakuma: Delay-in-frames correcting system in a PCM transmission line. Fujitsu, Staas & Halsey, August 5, 1997: US05654967 (2 worldwide citation)

A delay-in-frames correction system in a switch unit in a PCM transmission line is used for data communication. A channel data storage unit is provided to temporarily store data corresponding to each channel on the output side or the input side of the switch unit in each direction in the PCM transmi ...