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1. 发明专利

JP4990948B2 Splitter-less multi-carrier modem 有权
公开(公告)号：JP4990948B2
公开(公告)日：2012-08-01
申请号：JP2009232383
申请日：2009-10-06
申请人：ダフィモカンパニー,ビー.ヴィー. エルエルシーDaphimo Co. B.V., LLC.
发明人：エイ．グレスズクズックジョン , エム．クリンスキーデイビッド , エイ．タザネスマイケル , タザネスマルコス , ダブリュー．グロスリチャード
IPC分类号： H04J11/00 , H04L1/00 , H04B3/50 , H04L27/18 , H04L27/26 , H04L27/34 , H04M11/00 , H04M11/06 , H04Q11/02
CPC分类号： H04M11/062 , H04L1/0001 , H04L1/0025 , H04L5/0007 , H04L5/0046 , H04L5/0058 , H04L5/006 , H04L5/0094 , H04L5/1438
摘要： A modem for use in Digital Subscriber Line communications transmits and receives data over the local subscriber loop in common with voice information over the loop, while avoiding the need for voice/data splitters. The modem responds to disruptions associated with "disturbance events such as on-hook to off-hook transitions and the like by rapidly switching between pre-stored channel parameter control sets defining communications over the loop under varying conditions. In addition to changing parameter control sets responsive to a disturbance event, the modem may also change transmission power levels and other system parameters such as frequency domain equalizer characteristics. Further, provisions are made for reduced bandwidth communications under selected conditions.

4. 发明专利

JP3464749B2 Wavelength division type optical communication path 失效
公开(公告)号：JP3464749B2
公开(公告)日：2003-11-10
申请号：JP652897
申请日：1997-01-17
申请人：日本電信電話株式会社
发明人：岡本　　聡 , 篤渡辺
IPC分类号： H04B10/03 , H04B10/032 , H04B10/07 , H04B10/27 , H04B10/299 , H04Q3/52 , H04Q11/02 , H04B10/02

5. 发明专利

JP3210363B2 失效
公开(公告)号：JP3210363B2
公开(公告)日：2001-09-17
申请号：JP14355591
申请日：1991-06-14
IPC分类号： H04Q3/52 , H04Q11/00 , H04Q11/02

6. 发明专利

JP2001203827A SPLITTER FOR ANALOG TELEPHONE NUMBER AND DIGITAL DATA 失效
公开(公告)号：JP2001203827A
公开(公告)日：2001-07-27
申请号：JP2000346046
申请日：2000-11-14
申请人： CIT ALCATEL
发明人： REUSENS PETER P F
IPC分类号： H04J11/00 , H04M3/00 , H04M11/06 , H04M19/04 , H04Q3/42 , H04Q11/02
摘要： PROBLEM TO BE SOLVED: To provide a telephone system, in which frequency multiplexed analog telephone signal and digital data signal are transmitted via a line 3. SOLUTION: An incoming call is reported to a client private facility 2 by a call instruction signal, having an amplitude effectively from 1 V to 30 V. This amplitude is markedly smaller than ordinary calling. Therefore, call origination is facilitated, and further the call has a form smoother than rectangle. When this call instruction signal is received, a client private facility 2 locally generated a complete calling signal and sends it to a telephone 32. The amplitude of this local calling signal is greater than that of the call instruction signal, but in order to avoid digital data transmission from being interfered by a calling current to become the generation source of serious impulse noises in conventional technology, a line having the digital data signal is disconnected from the client telephone facility, when the calling signal is generated.

7. 发明专利

JP2964984B2 失效
公开(公告)号：JP2964984B2
公开(公告)日：1999-10-18
申请号：JP8508597
申请日：1997-04-03
申请人： NIPPON DENKI KK
发明人： SHIRAGAKI TATSUYA
IPC分类号： G02F1/313 , G02F1/31 , G02F2/02 , H04Q11/00 , H04Q11/02
摘要： An optical switch device includes an integrated space switch section and a wavelength switch section which reduces, a packaging volume and cost. The optical switch device includes a plurality of multi-functional wavelength converters. One of these converters includes a wavelength converter 121, in which an input terminal and an output terminal are connected to optical divider 131 and opticalcoupler 141, respectively, is operated as the wavelength converter only when a current flows through a semiconductor optical amplifier in the wavelength converter. When the current does not flow through the amplifier, the light is not outputted. By turning on/off the current flowing through the semiconductor optical amplifier in the wavelength converter, wavelength converter 121 can functions as a gate switch. The switch device has both of a wavelength conversion function and a space switch function. Wavelength converters 121-123 connected to one optical divider 131 are connected to different opticalcouplers 141-143, respectively, whereby the device can also have a wavelength multiplexing function.

8. 发明专利

JPH10282532A OPTICAL SWITCH DEVICE 失效
公开(公告)号：JPH10282532A
公开(公告)日：1998-10-23
申请号：JP8508597
申请日：1997-04-03
申请人： NEC CORP
发明人： SHIRAGAKI TATSUYA
IPC分类号： G02F1/313 , G02F1/31 , G02F2/02 , H04Q11/00 , H04Q11/02
摘要： PROBLEM TO BE SOLVED: To provide an optical switch device reduced in its packaging volume and cost by integrally forming a space switch part and an wavelength switch part. SOLUTION: An wavelength converter 121 connecting its input terminal to an optical branching unit 131 and connecting its output terminal to an optical coupler 141 acts as an wavelength conveter only when a current is injected into a semiconductor optical amplifier included in its inside, and when a current is not injected, outputs no light. Thereby the converter 121 can be allowed to act as a gate switch by turning on/off the injection current to the amplifier in the converter 121, so that the converter 121 constitutes a switch device having both of an wavelength conversion function and a space switch function. When plural wavelength converters 121 to 123 connected to one optical branching unit 131 are connected to respectively different optical couplers 141 to 143, the device can be provided with an wavelength multiplexing function.

9. 发明专利

JP2754403B2 失效
公开(公告)号：JP2754403B2
公开(公告)日：1998-05-20
申请号：JP14659089
申请日：1989-06-12
申请人： FUJITSU KK
发明人： KUROYANAGI TOMOJI , SHIMOE TOSHIO
IPC分类号： H04Q11/02 , H04Q3/52

10. 发明专利

JPH09113855A OPTICAL BRANCHING AND INSERTING NODE AND OPTICAL NETWORK 失效
公开(公告)号：JPH09113855A
公开(公告)日：1997-05-02
申请号：JP27303195
申请日：1995-10-20
申请人： NEC CORP
发明人： MISONO MASATOSHI , HENMI NAOYA
IPC分类号： G02F1/11 , G02F1/33 , H04B10/07 , H04B10/2507 , H04B10/27 , H04B10/275 , H04B10/29 , H04J14/00 , H04J14/02 , H04Q3/52 , H04Q11/02 , H04B10/02
摘要： PROBLEM TO BE SOLVED: To enable branching and insertion by one branching filter without any signal deterioration due to interference by shifting branch light and insert light shift in light frequency. SOLUTION: A node controller 1 controls a branching and inserting filter driving device 41 by utilizing the output of an optical receiver 321 so that the center wavelength of the branching and inserting filter and the branched light wavelength become stable shifting by 2.5GHz. As a method for the stabilization, a method which equalizes the output of the optical receiver 321 to a reference voltage can be employed. An optical branch 212 branches and sends part of light sent out to an optical transmission line 202 to the optical receiver 322. The received signal is sent to the node controller 1. The node controller 1 controls the optical receiver 301 to stabilize inserted light to the branching and inserting filter 101 as well as the branched light of the branching and inserting filter 101. Consequently, only one acoustooptical filter is needed as a branching and inserting switch.

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