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1. 发明专利

JP2006345131A OPTICAL ACCESS NETWORK SYSTEM 审中-公开
公开(公告)号：JP2006345131A
公开(公告)日：2006-12-21
申请号：JP2005167764
申请日：2005-06-08
申请人： HITACHI COMM TECH LTD
发明人： SEKINE KENRO , TAJIMI NOBURO
IPC分类号： H04B10/00 , H04B10/07 , H04B10/2507 , H04B10/2525 , H04B10/27 , H04B10/272 , H04J14/08
摘要： PROBLEM TO BE SOLVED: To provide an optical access network system having a function of correcting waveform distortion of an up signal generated on a passive optical network (PON). SOLUTION: A station-side device has: a main control section for reporting a transmission permission period to each subscriber connection device; a tap gain adaptive control type equalizer for correcting waveform distortion of a received signal from a subscriber device; an equalizer control section; and a parameter table containing tap gain initial values to be set to the equalizer by the subscriber connection devices. The main control section issues a switching request for equalization characteristics to the equalizer control section every time the transmission permission period is reported to the subscriber connection device, and the equalizer control section reads a tap gain initial value corresponding to an identifier of a subscriber connection device out of the parameter table and sets it to the equalizer in response to the switching request. COPYRIGHT: (C)2007,JPO&INPIT

2. 发明专利

JP2006222619A CONTACTLESS IC CHIP MOUNTED RADIO COMMUNICATION TERMINAL DEVICE, READER WRITER DEVICE FOR CONTACTLESS IC CHIP, AND COMMUNICATION SYSTEM FOR CONTACTLESS IC CHIP 审中-公开
公开(公告)号：JP2006222619A
公开(公告)日：2006-08-24
申请号：JP2005032915
申请日：2005-02-09
申请人： HITACHI COMM TECH LTD
发明人： TAKAHASHI MASAMI
IPC分类号： H04B7/26 , G06K17/00 , G06K19/07 , G06K19/10 , H04B1/59 , H04B5/02 , H04W12/06 , H04W88/18
摘要： PROBLEM TO BE SOLVED: To check whether or not a reader writer device is reliable by accessing an authentication server on a network through a radio communication terminal device. SOLUTION: When there is access from the reader writer device which reads and writes a contactless IC chip, a device ID acquisition request section sends out an ID acquisition request to the reader writer device 1. When an ID is acquired from the reader writer device 1, a device ID authentication request section sends out a request to authenticate the ID to the reader writer device 1. A device ID authentication decision section which performs authentication decision processing according to an authentication result corresponding to the authentication request. When the device ID authentication decision section determines authentication confirmation OK, the contactless IC chip of contactless IC chip mounted radio communication terminal device is permitted to be read and written according to the access from the reader writer device 1. COPYRIGHT: (C)2006,JPO&NCIPI

3. 发明专利

JP2006186489A DISPERSION COMPENSATION APPARATUS AND DISPERSION COMPENSATION METHOD 审中-公开
公开(公告)号：JP2006186489A
公开(公告)日：2006-07-13
申请号：JP2004375729
申请日：2004-12-27
申请人： HITACHI COMM TECH LTD
发明人： FUKASHIRO YASUYUKI , NAKANO HIROYUKI , UDA TETSUYA , HIRAI TORU
IPC分类号： H04B10/2507 , H04B10/2525 , H04B10/275 , H04B10/29 , H04B10/291 , H04B10/524 , H04J14/00 , H04J14/02
摘要： PROBLEM TO BE SOLVED: To realize variable dispersion compensation for dispersion shifted fiber. SOLUTION: A dispersion compensated fiber with a positive wavelength dispersion and a dispersion compensation fiber with a negative wavelength dispersion are prepared, a wavelength multiplex optical signal is introduced to either of the dispersion compensated fibers, once the entire wavelength band has shifted positively or negatively, and thereafter the wavelength band is fine-adjusted, by using the dispersion compensation fiber of the opposite polarity. COPYRIGHT: (C)2006,JPO&NCIPI

4. 发明专利

JP2003264634A HOOKING SIGNAL TRANSMITTING METHOD AND IP GATEWAY DEVICE FOR TRANSMITTING HOOKING SIGNAL 审中-公开
公开(公告)号：JP2003264634A
公开(公告)日：2003-09-19
申请号：JP2002061346
申请日：2002-03-07
申请人： HITACHI COMM TECH LTD
发明人： ENDO NOBUYUKI
IPC分类号： H04L12/66 , H04M3/00
摘要： PROBLEM TO BE SOLVED: To transmit a hooking signal on an IP network 4 regardless of the call control procedure of a VoIP (Voice over IP). SOLUTION: A VoIP gateway device 1 detects the continuation time of the hooking signal transmitted from an accommodated exchange 2 and acquires the time stamp of an audio IP packet storing an audio signal received from the accommodated exchange 2 in such a case. Then, a hooking IP packet storing them is generated and reported to an opposed apparatus via the IP network 4. Besides, after a timing to transmit an audio signal restored from the audio IP packet having the time stamp contained in the hooking IP packet received from the IP network 4 to the accommodated exchange 2, the hooking signal having the continuation time contained in the hooking IP packet is sent to the accommodated exchange 2. COPYRIGHT: (C)2003,JPO

5. 发明专利

JP2003244203A BAND DIVISION COMMUNICATION EQUIPMENT AND SYSTEM 审中-公开
公开(公告)号：JP2003244203A
公开(公告)日：2003-08-29
申请号：JP2002043764
申请日：2002-02-20
申请人： HITACHI COMM TECH LTD
发明人： SUZUKI KATSUHIKO , HASHIMOTO HIROAKI
IPC分类号： H04L12/911 , H04L12/707 , H04L12/709 , H04L12/801 , H04L12/851 , H04L29/06 , H04L29/14 , H04L12/56
摘要： PROBLEM TO BE SOLVED: To provide band division communication equipment capable of continuing communication by flexibly assigning a communication band to another operable leased line when any failure is occurred in a leased line. SOLUTION: The band division communication equipment 1 for executing communication by assigning respective communication bands obtained by dividing the communication band of at least two leased lines 7-1 and 7-2 to a plurality of data terminal equipment 3 is provided with a line monitoring means 15 for monitoring the soundness of the respective operating lines, communication band assigning means 17 and 131 for dividing the communication band of the operable lines, and for assigning those communication bands to those respective data terminal equipment, and a communicating speed control means 18 for controlling the communicating speed of each data terminal equipment. When the soundness of any line is damaged, the communication band of the operable lines is assigned to those respective data terminal equipment, and the communicating speeds of those respective data terminals are controlled so as to be the communicating speeds of the assigned communication bands. COPYRIGHT: (C)2003,JPO

6. 发明专利

JP2003229926A BULK COMMUNICATION CONTROL DEVICE AND BULK COMMUNICATION CONTROL METHOD 审中-公开
公开(公告)号：JP2003229926A
公开(公告)日：2003-08-15
申请号：JP2002026920
申请日：2002-02-04
申请人： HITACHI COMM TECH LTD
发明人： SAURA KOICHI , KAWASHIMA TOMOKAZU , TANABEYA KANJI
IPC分类号： H04L29/08
摘要： PROBLEM TO BE SOLVED: To provide a bulk communication control device which performs a bulk communication by bundling only successful channels when the connection or bulk procedure of all channels is not made successful. SOLUTION: The bulk communication control device 1 comprises: a terminal interface part 11 for communicating with a data terminal device 3 at an arbitrary communication velocity; line interfaces 14 and 15 for performing communications by a plurality of channels between communication lines 5 and 6; a line control part 13 for carrying out call control with the communication lines; and a data control part 12 having a line delay time detecting part for detecting a line delay time difference for each channel, a training data transmitting/receiving part for transmitting/receiving bulk communication training data and a velocity matching part for matching the velocities of data received from the communication lines on the basis of the detection data of the delay time detecting part. The bulk communication is performed by using the channel in which delay corrected data are successfully transmitted/received within a prescribed time by acquiring the delay correction data while using the channel in which call setting is made successful within the prescribed time. COPYRIGHT: (C)2003,JPO

7. 发明专利

JP2003209621A SWITCHING DEVICE 审中-公开
公开(公告)号：JP2003209621A
公开(公告)日：2003-07-25
申请号：JP2002272600
申请日：2002-09-19
申请人： HITACHI COMM TECH LTD
发明人： NAGAYAMA SAKAE , AZUMA KAZUMASA , KATAGIRI KAZUNOBU
IPC分类号： H04L12/66 , H04M3/00
摘要： PROBLEM TO BE SOLVED: To provide message services equivalent to conventional circuit switched services at a low cost, by making voice data into IP (Internet protocol) packets using a packet network such as the Internet. SOLUTION: The switching device comprises a conventional circuit unit 11 for accommodating a general telephone 5 and a PSTN (public switched telephone network) 8, an IP call control unit 14 for conducting call control with a packet network, a voice conversion unit 13 for conducting mutual conversion between voice data and packet voice data, and a switching control unit 12 for conducting respective switching control on the conventional circuit unit 11, the IP call control unit 14, and the voice conversion unit 13. Call control information from the PSTN 8, etc., to the packet network is received by the conventional circuit unit 11, and passed to the IP call control unit 14 by the switching control unit 12 to be converted into call control data in accordance with the packet network. Voice data from the PSTN 8, etc., to the packet network is received by the conventional circuit unit 11, and passed to the voice conversion unit 13 to be converted into voice data in accordance with the packet network. COPYRIGHT: (C)2003,JPO

8. 发明专利

JP2003198430A CLOCK GENERATOR 审中-公开
公开(公告)号：JP2003198430A
公开(公告)日：2003-07-11
申请号：JP2001394931
申请日：2001-12-26
申请人： HITACHI COMM TECH LTD
发明人： KIKUCHI NOBUTSUGU
IPC分类号： G06F1/04 , H03L7/00 , H04B1/74 , H04L7/00 , H04L7/033
摘要： PROBLEM TO BE SOLVED: To provide a simply configured and high-stable clock generator which can gradually follow the reference clock of a different phase without changing the phase of clock output before and after switching even when a standby system is switched to an active system by matching the clock output of the standby system to the reference cock of the active system beforehand even when the phases of the reference clocks of the active system and the standby system are different. SOLUTION: An A system clock generator 2 and a B system clock generator 3 in the duplex configuration of the active system and the standby system are provided while having oscillators 4 and 9, selectors 5 and 10, phase-locked loop (PLL) circuits 6 and 11, output gates 7 and 12 and system switching control circuits 8 and 13. COPYRIGHT: (C)2003,JPO

9. 发明专利

JP2003198081A INFORMATION DISPLAY STRUCTURE FOR PRINTED CIRCUIT BOARD 审中-公开
公开(公告)号：JP2003198081A
公开(公告)日：2003-07-11
申请号：JP2001391359
申请日：2001-12-25
申请人： HITACHI COMM TECH LTD
发明人： ENDO SADAO
IPC分类号： H05K1/02 , H05K3/46
摘要： PROBLEM TO BE SOLVED: To solve the problem that a printed circuit board is reduced in size and increased in density following the reduction in size of an electronic apparatus, and hence it is difficult to secure a space for an information display unit. SOLUTION: A board 1A has an electronic component mounting surface 3 for mounting an IC 4, a resistor 4, a capacitor 6 and the like of electronic components, and an interference area 2 of a dead space slidably inserted into guide rails 17A, 17B of shelves 16A, 16B of an apparatus body 14. In this body, a recess 13 is formed on a surface of the area 2, an information display medium 12 showing the information or the like relating to the printed circuit board 1 is disposed in a bottom of the recess 13, and a surface 12a of the medium 12 is not projected externally from the surface 2a of the area 2. COPYRIGHT: (C)2003,JPO

10. 发明专利

JP2003188482A PRINTED WIRING BOARD 审中-公开
公开(公告)号：JP2003188482A
公开(公告)日：2003-07-04
申请号：JP2001387931
申请日：2001-12-20
申请人： HITACHI COMM TECH LTD
发明人： TAKITA MASAKICHI , TAKADA SHOSAKU
IPC分类号： H05K1/02
摘要： PROBLEM TO BE SOLVED: To solve the problem that a worker may overlooks a V-cut processing recognition pattern due to the hardly recognizable property of the pattern and, particularly, unprocessed V-cuts are formed when the number of V-cuts to be processed is large. SOLUTION: A printed wiring board has a product section 2 on which electronic parts are mounted, a disposable board section 3, and a V-cut formed on the boundary 4 between the product section 2 and disposable board section 3 for cutting off the section 3 from the section 2. The V-cut processing recognition pattern 5 indicating the necessity/unnecessity of V-cut processing and the processing position of the V-cut when the V-cut must be processed is provided on the boundary 4 and, at the same time, V-cut processing recognition notched sections 7L and 7R for causing the worker to recognize the necessity/unnecessity of V-cut processing and the processing position of the V-cut are provided on the outside of the pattern 5 in the end sections of the disposable board section 3. COPYRIGHT: (C)2003,JPO

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