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公开(公告)号：US4103113A
公开(公告)日：1978-07-25
申请号：US788972
申请日：1977-04-19
摘要： Key information from an attendant console is transferred to a telephone exchange in a bit serial manner, and line status information from the telephone exchange is also transferred in a bit serial manner and in a time-shared manner. At the request of the attendant console, the line status information is transferred from the telephone exchange to the attendant console in a bit serial manner, and subjected to serial-parallel conversion to obtain parallel signals for driving lamp indicator portions so as to provide an indication of the line status information. The number of signal lines connected to the attendant console is markedly reduced and, in the case of telephone number modification or the like, proper steps can be taken immediately.
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公开(公告)号：US4113990A
公开(公告)日：1978-09-12
申请号：US788971
申请日：1977-04-19
申请人： Shoji Nojiri , Hisao Kanzaki , Nobuyuki Yasoshima , Yasuo Satake , Kenichi Ogawa
发明人： Shoji Nojiri , Hisao Kanzaki , Nobuyuki Yasoshima , Yasuo Satake , Kenichi Ogawa
CPC分类号： H04M19/02
摘要： A signal sending control system for use in a telephone system includes a ringing signal sending circuit having a signal source for generating a continuous ringing signal, interrupting means for controlling the sending of the ringing signal over each subscriber line, one switch for each subscriber line for selectively and switchably connecting the respective subscriber line to a speech network of the system and to the ringing signal sending circuit, a common controller for providing control information as to the duration of the ringing signal, and a control circuit for individually controlling the switching circuit of each subscriber line in accordance with the control information and for controlling the transmission duration of the ringing signal.
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公开(公告)号：US3643031A
公开(公告)日：1972-02-15
申请号：US3643031D
申请日：1969-09-15
申请人： KOKUSAI DENSHIN DENWA CO LTD , FUJITSU LTD , HIROSHI SASAKI , TATSUO MARUYAMA , HISAO KANZAKI , YASUHIKO SAKAMOTO , NOBUYUKI YASOSHIMA
CPC分类号： H04B7/2123
摘要： A time division multiplexing communication system has a plurality of stations and a switching station. Two of the stations communicate with each other via the switching station by utilizing signals comprising a block having a plurality of words each comprising a plurality of frames which are bursts of a constant time length. Each of the stations comprises channel rearrangement control means for rearranging ground channels to satellite channels and for rearranging satellite channels to ground channels in accordance with informations from an order data channel. Burst synchronism control means connected to the channel rearrangement control means provides the timing of transmission and reception of bursts. Order word controls means connected to the channel rearrangement control means receives command data, provides an order data channel, changes the command data to the format of the order data channel, transmits the format to the other stations and assembles a word from the order data channel information received from the other stations. Command control means is connected to the order word control means, the channel rearrangement control means and the burst synchronism control means and is controlled by a program to discriminate the condition of operation of the channel rearrangement control means, the burst synchronism control means and the order word control means, and supplies thereto command data commanding the means to operate. The order word control means transfers the work assembled from the order data channel received from the other stations to the command control unit when the word is directed to the station. Block synchronism controlling means controls the timing of transmission and reception of the blocks and provides block synchronism for blocks of period TB determined in accordance with the equations nTB > OR = Tl +TP and (n- 1)TB
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