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1. 发明专利

JP2590274B2 失效
公开(公告)号：JP2590274B2
公开(公告)日：1997-03-12
申请号：JP30166589
申请日：1989-11-20
申请人： FUJITSU LTD
发明人： SHUDO HIDEKI , KOBAYASHI OSAMU , IKEDA KOJI
IPC分类号： H04L5/14 , H04L25/02 , H04L25/49

2. 发明专利

JPH07250366A SIMPLE CORDLESS TELEPHONE SYSTEM 失效
公开(公告)号：JPH07250366A
公开(公告)日：1995-09-26
申请号：JP3744894
申请日：1994-03-09
申请人： FUJITSU LTD , FUJITSU ACS KK
发明人： IKEDA KOJI , OSAJIMA MASAHIRO
IPC分类号： H04W48/20 , H04W68/00 , H04W76/02 , H04W84/10 , H04Q7/22 , H04Q7/28 , H04Q7/38
摘要： PURPOSE:To improve convenience of communication by eliminating the need for complicated and expensive exclusive function for connection control to a cordless telephone set but using a general private branch of exchange such as an existing private branch of exchange to implement connection control. CONSTITUTION:Each of plural lines 2 is made corresponded to each of plural cordless telephone sets by one to one each and an exchange 1 and a base station equipment 10 are used to input a calling/receiving signal of the telephone set 3 to the line 2. Upon the receipt of a connection request to a called cordless telephone set 3, the exchange 1 configured as above connects the line 2 corresponding to the telephone set 3 to the device 10, a control means 15 provided in the device 10 identifies the telephone set 3 corresponding to the line 2 having the connection request and calls the telephone set 3 through a radio channel 4. Since the lines 2 are connected in multiple, even when a telephone set 3 is in any radio zone 5, the connection is made available. That is, the exchange 1 handles the telephone sets 3 as if the telephone sets 3 were directly connected similarly to the case with lines connecting a stationary terminal equipment such as an accommodated terminal equipment 7.

3. 发明专利

JPH0548575A SECRECY COMMUNICATION METHOD 失效
公开(公告)号：JPH0548575A
公开(公告)日：1993-02-26
申请号：JP20666491
申请日：1991-08-19
申请人： FUJITSU LTD
发明人： IKEDA KOJI , KATAYAMA SUETOSHI
IPC分类号： H04B7/26 , H04K1/02
摘要： PURPOSE:To maintain secrecy of communication by synthesizing speech and noise and separating noise from speech at the receiving side after sending noise for a predetermined period of time before starting communication at the sending side. CONSTITUTION:Apparatus 300 at the sending side transfers noise generated by a noise generating means 301 for a predetermined period of time before beginning communication to apparatus at the receiving side via a signal sending means 303 through radio line 500, and then uses noise synthesizing means 302 to synthesize speech and noise and sends the result. Signal receiving means 401 of apparatus 400 transmits transferred noise to noise holding means 402, and then the synthesized signal to noise separating means 403. The noise separating means 403 separates noise from the synthesized signal, and outputs the remaining speech. Consequently, even when the synthesized speech is received, speech cannot be recognized, and privacy of communication for a mobile communication system, or the like can be maintained.

4. 发明专利

JPH0385040A OUTPUT CIRCUIT 失效
公开(公告)号：JPH0385040A
公开(公告)日：1991-04-10
申请号：JP22214189
申请日：1989-08-28
申请人： FUJITSU LTD
发明人： KOBAYASHI OSAMU , SHUDO HIDEKI , IKEDA KOJI
IPC分类号： G06F3/00 , H03K19/003 , H03K19/0175 , H04L12/40 , H04L25/02
摘要： PURPOSE:To prevent the effect onto signal transmission of other equipment at the time of turning off a power supply without use of a relay by combining a semiconductor switch element and a semiconductor rectifier element as specified. CONSTITUTION:An N-channel MOSFET 19 being a semiconductor switch element and a PN junction diode 20 being a semiconductor rectifier element are provided to the circuit in addition to a P-channel MOSFET 1 and an N-channel MOSFET 2. Since the FET 19 is turned on at the time of applying the power supply, a signal controlled by a control signal S0 or S0' is sent. Moreover, the FET 19 is turned off at interrupt of power. Thus, the FET 19 and the diode 20 have a high impedance with respect to a positive signal. Thus, even when the positive signal is applied to an output terminal 4 from other equipment, the signal flowing to a power supply line 3 of the output circuit is avoided.

5. 发明专利

JPH02281856A AUTOMATIC RINGER SWITCHING SYSTEM 失效
公开(公告)号：JPH02281856A
公开(公告)日：1990-11-19
申请号：JP10394289
申请日：1989-04-24
申请人： FUJITSU LTD
发明人： IKEDA KOJI , MAKIYAMA TAKAO
IPC分类号： H04M1/00
摘要： PURPOSE:To improve the service characteristic of a telephone set by executing the sending-out/non-sending-out of a ringer tone and the turning on/off of a calling display lamp in accordance with the set condition of an incoming display method in the daytime and at night, and also, executing automatic switching in the daytime and at night. CONSTITUTION:This system is constituted of an incoming detecting means 1, an incoming display method input means 2, an incoming display method storage means 3, an illuminance measuring means 4, a day/night deciding means 5, an incoming display control means 6, a ringer tone sending-out means 7, and an incoming display lamp igniting means 8. In this state, in accordance with the incoming display method which is set separately in the daytime and at night, sending-out/non-sending-out of the ringer tone and turning on/off of alight emission diode for the incoming display are executed, therefore, since an unnecessary display is not executed, and also, automatic switching of day/ night is executed, it does not occur that the incoming call is not displayed in a state that the system remains under the night condition even in the daytime. In such a manner, the service characteristic of the telephone set is improved.

6. 发明专利

JPH01268327A TIME DIVISION MULTIPLEXING SYSTEM 失效
公开(公告)号：JPH01268327A
公开(公告)日：1989-10-26
申请号：JP9774688
申请日：1988-04-20
申请人： FUJITSU LTD
发明人： SANO YOSHIO , IKEDA KOJI
IPC分类号： H04J3/00
摘要： PURPOSE:To curtail the number of necessary integrated circuits by constituting a communication speed converting means provided in accordance with each input digital signal, a time area setting means and a gate means by one integrated circuit. CONSTITUTION:Each communication speed converting means 100 receives the corresponding input digital signals a0-an, respectively, each gate means 300 outputs repeated digital signals d0-dn outputted from the corresponding communication speed converting means 100, respectively only during time areas to-tn which are set by the corresponding time area setting 200, and by connecting in parallel outputs of each gate means 300, a time division multiplexing signal (e) is outputted. Also, the communication speed converting means, the time area setting means and the gate means are constituted of one integrated circuit. In such a way, in order to obtain the time division multiplexing signal, other integrated circuit than integrated circuits corresponding to the number of input digital signals is not required, and the number of necessary integrated circuits is curtailed.

7. 发明专利

JPH11143817A INFORMATION PROCESSING SYSTEM, SYSTEM BUS TESTING METHOD AND STORAGE MEDIUM RECORDING ITS PROCESSING PROGRAM 失效
公开(公告)号：JPH11143817A
公开(公告)日：1999-05-28
申请号：JP31207697
申请日：1997-11-13
申请人： NIPPON TELEGRAPH & TELEPHONE , NEC CORP , FUJITSU LTD , OKI ELECTRIC IND CO LTD , HITACHI LTD
发明人： MASUDA ETSUO , SHINPO HIDEO , ISHIKAWA YASUHIRO , IKEDA KOJI , KOBAYASHI HIROSHI , HASHIMOTO HIROSHI
IPC分类号： G06F11/22 , G06F13/28
摘要： PROBLEM TO BE SOLVED: To efficiently execute the performance test of a system bus at an information processing system. SOLUTION: DMAC 8 provided in an input/output controller 4 is started from CPU(central processing unit) 1 and pseudo DMA transfer (DMA transfer without operating a subordinate input/output device) is executed between the controller 4 and a main memory 2 through the DMAC(direct memory access controlling circuit) 8 to give a load to a system bus by this pseudo DMA transfer to test durability and stability of the system bus in the configuration of the information processing system.

8. 发明专利

JPH04100369A DATA/VOICE COMMUNICATION SWITCHING SYSTEM 失效
公开(公告)号：JPH04100369A
公开(公告)日：1992-04-02
申请号：JP21783290
申请日：1990-08-18
申请人： FUJITSU LTD
发明人： IKEDA KOJI , SANO YOSHIO
IPC分类号： H04M11/06
摘要： PURPOSE:To facilitate switching between a voice communication and a data communication by recognizing the data transmission by a monitor part when some of specific bits are not changed and the voice communication when the specific bits are all changed, and switching a changeover switch. CONSTITUTION:A voice terminal 10 transmits a voice signal by using all bits of a transmission unit consisting of a specific number of bits and a data terminal 11 sends a data signal by using some of the bits of the transmission unit while the remaining bits are set to a fixed value. A monitor part 13 recognizes the signal of the voice communication when the specific bits are all changed and switch the switch 12 to the voice terminal 10, but when some of the specific bits are set to the fixed value and not changed, the signal of the data communication is recognized and the switch 12 is switched to the data terminal 11. Consequently, the voice communication and data communication are easily switched without any intervention of an operator and one channel B is effectively usable, thereby improving the serviceability.

9. 发明专利

JPH03162036A DRIVER CIRCUIT 失效
公开(公告)号：JPH03162036A
公开(公告)日：1991-07-12
申请号：JP30166589
申请日：1989-11-20
申请人： FUJITSU LTD
发明人： SHUDO HIDEKI , KOBAYASHI OSAMU , IKEDA KOJI
IPC分类号： H04L5/14 , H04L25/02 , H04L25/49
摘要： PURPOSE:To reduce undershoot of an output pulse by short-circuiting a secondary side of a pulse transformer so as to avoid high impedance state. CONSTITUTION:When no reference voltage is fed to a pulse transformer 10, the secondary side terminal of the pulse transformer 10 reaches a high impedance and in this case, a short-circuit means 30 short-circuits the secondary winding of the pulse transformer 10 for a prescribed period after the reference voltage interrupt is started. Thus, just after the application of the reference voltage to the pulse transformer 10 from a switch circuit 20 is interrupted, the charge stored in line capacitor C is discharged momentarily via the short- circuit means 30. Thus, the attenuation vibrating state is avoided.

10. 发明专利

JPH03101550A POWER INPUT CONTROLLER TO ISDN TERMINAL EQUIPMENT 失效
公开(公告)号：JPH03101550A
公开(公告)日：1991-04-26
申请号：JP23872289
申请日：1989-09-14
申请人： FUJITSU LTD
发明人： IKEDA KOJI , NAKAYAMA MIKIO
IPC分类号： H04M1/00 , H04M1/253 , H04M19/08 , H04Q11/04
摘要： PURPOSE:To minimize the power consumption at a power failure by providing a line signal detection circuit, a switch closing state self-hold circuit, a line signal detection inhibit circuit and a self-hold release circuit. CONSTITUTION:When a signal on a signal line 101 is detected by a line signal detection circuit 1, a switch closing state self-hold circuit 2 uses the line signal detection circuit 1 to receive the state of the signal detection on the signal line 101 and to close a switch SW thereby holding the closing state. Thus, power supply to an exchange is applied from a power supply 118 through a power input line 117. When a hook switch HS1 is closed, a line signal detection inhibit circuit 3 inhibits line signal detection by the line signal detection circuit 1 in interlocking with the closing of the hook switch HS1. Thus, the power input to an ISDN terminal equipment is controlled at power supply limit such as power failure.

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