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    • 24. 发明专利
    • TELEPHONE TRANSFER SYSTEM
    • JPH03147463A
    • 1991-06-24
    • JP28470989
    • 1989-11-02
    • HITACHI LTD
    • YAMAGISHI JUNKOMIZUHARA NOBORUSAKUMA TETSUO
    • H04M3/54H04M3/42
    • PURPOSE:To attain the connection between a caller and a called party by devising the system such that transfer registration is attained from a public telephone network to a PBX and a public telephone network telephone number is set as a transfer destination telephone number so as to make dialing to the public telephone network at the arrival of a call. CONSTITUTION:When a PBX 100 receives an extension telephone number or a transfer destination telephone number as a transfer registration special number and a transfer original telephone number from an extension telephone set 104 or a public telephone network 107, a controller 102 reads a transfer registration table 200 from a memory 103 of the PBX 100. Then the received extension telephone number is retrieved based on the read table 200. When the received extension telephone number exists, the transfer destination telephone number received by the transfer destination telephone number area 203 relating to the received extension telephone number is recorded in the read table 200 and a transfer display flag 202 is set to 1. Then the controller 102 gives a command to send a processing end tone to a switch device 101 to terminate the processing. When the received extension telephone number does not exist as the result of the retrieval, the disabled transfer registration is informed.
    • 25. 发明专利
    • INDIVIDUAL TELEPHONE NUMBER SYSTEM
    • JPH02172357A
    • 1990-07-03
    • JP32577988
    • 1988-12-26
    • HITACHI LTD
    • MIZUHARA NOBORUAZEYANAGI MIKISUKE
    • H04M3/42
    • PURPOSE:To improve the operability by providing a reference list between an individual telephone number and a subscriber number and also a reference list between an abbreviated number and an individual telephone number in a memory of an exchange. CONSTITUTION:A reference list between an individual telephone number and a telephone number and also a reference list between an abbreviated individual telephone number used for an individual for each individual belonging to an exchange network and an individual telephone number are provided in a memory 205 of an exchange 200. Then the telephone set 200 converts the abbreviated individual telephone number received from an outgoing telephone set 100 into a destination telephone number by using the two lists to connect an outgoing telephone set 100 and an incoming telephone set 100. Thus, even in the individual telephone number system in which a telephone number is provided for each individual registered to an exchange network, the abbreviated dial is usable and the operability at dialing is improved.
    • 28. 发明专利
    • DIGITAL NETWORK SYSTEM CHANGEOVER SYSTEM
    • JPH01138832A
    • 1989-05-31
    • JP29597087
    • 1987-11-26
    • HITACHI LTD
    • IINO YUKIOINOUE KENSUKEAOKI EIJIMIZUHARA NOBORU
    • H04B1/74H04L1/22H04M3/22
    • PURPOSE:To attain uninterruptible system changeover by connecting nodes by a duplicated transmission line and applying system switching at fault synchronously with the clock of the transmission line at the signal receiving side of the opposite node. CONSTITUTION:If a fault takes place in a 0 system transmission line 50, transmission line interfaces 25, 35 of stations A, B detect it. The station A uses the detected information to give a system changeover command 1 to a selector 63 in a 0 system line setting multiplex/demultiplex switch 23. As a result, the signal from the 0 system interface 25 is received by the selector 63 into the signal reception from the transmission line interface 26 of the 1 system synchronously with the clock of the transmission line. On the other hand, the station B uses the fault detection information of the interface 35 to give the system changeover command 1 to the collector 73 in the 0 system line setting multiplex/ demultiplex switch 33. Thus, the signal reception from the 0 system interface 35 is switched into the signal reception from the 1 system interface 36 synchronously with the clock of the transmission line.
    • 30. 发明专利
    • COLLECT CALL SERVICE SYSTEM
    • JPS62147854A
    • 1987-07-01
    • JP28771985
    • 1985-12-23
    • HITACHI LTD
    • MIZUHARA NOBORUHOSHI TORU
    • H04M3/42
    • PURPOSE:To attain the automation and instantaneousity of a collect call service by applying a collect call incoming when a pass word for collect call registered by each subscriber in advance and a pass word dialed by a caller are coincident with each other. CONSTITUTION:When the pass word number registration request of the collect call is set, the pass word number represented by dialing is received and the collect call incoming enable displays and the pass word number are registered to a location in a collect call control table corresponding to the relevant sub scriber respectively. When the collect call sending request is given, an opposite dial number and the pass word number are received. The pass word number of the subscriber corresponding to the received opposite dial number is read from the collect call control table, compared with the received pass word num ber and when the pass word numbers are coincident with each other as the result, a call tone is sent to the calling subscriber and the talking state is set. The talking charge during this operation is charged upon the incoming subscrib er and the processing is finished when the handset is hooked on by either one of the parties.