会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 41. 发明专利
    • TIME-DIVISION FEEDING SYSTEM
    • JPH0194795A
    • 1989-04-13
    • JP25270687
    • 1987-10-07
    • FUJITSU LTD
    • SAWANO KAZUHIKOSHINKAWA HIROSHIYOSHINO HARUYUKI
    • H04Q3/42
    • PURPOSE:To scale down a subscriber circuit by providing a time-division switch periodically and time-dividedly charging a capacitor provided to the subscriber circuit in a different phase with the aid of D.C. power source supplied from a common power source part. CONSTITUTION:The time division switch 6i, the capacitor for accumulation 7 and a low-pass filter 8 are respectively provided to the subscriber circuit 20i housing each subscriber. When the control signal (fi) of a logical value zero is inputted, the switch 6i is set to a block state and set to a conductive state when the signal (fi) of the logical value '1' is inputted. The signal (fi) shows the logical value 1 only in a prescribed term (t) with a different phase in a prescribed cycle T0 and shows the logical value zero in the other term. As the result, the D.C. electric power source of -48 volt is time-dividedly fed to the circuit 20i from the common electric power source part 1 in the prescribed term (t) with the different phase every prescribed cycle T0, the capacitor 7 is charged and smoothed by the filter 8.
    • 46. 发明专利
    • REMOTE SUBSCRIBER ACCOMMODATING EQUIPMENT
    • JPS6394797A
    • 1988-04-25
    • JP23990886
    • 1986-10-08
    • FUJITSU LTD
    • YOSHINO HARUYUKIMATSUMOTO YUZO
    • H04Q3/60
    • PURPOSE:To accommodate a comparatively small number of remote subscribers in a digital exchange economically by locating a remote subscriber equipment on a remote location, connecting a telephone set by a subscriber line of a short distance and connecting it to a digital exchange by a multiplex transmission line. CONSTITUTION:A remote subscriber accommodating equipment 22 is arranged near plural telephone sets 1 at a remote location and the telephone sets 1 are accommodated in each subscriber circuit 3 in the remote subscriber accommodating equipment 22 via a subscriber line 12 within a prescribed distance 12. A voice signal subjected to digital coding sent/received from and to a digital exchange network by the subscriber circuit 3 is subjected to time division multiplex by a multiplexer 100 and sent via a multiplex transmission line 30 synchronized by synchronizing devices 27, 28. Moreover, a call signal sent from the subscriber circuit 3 to each telephone set 1 is supplied from a signal repeater 23 based on an instruction transmitted from the digital exchange. Moreover, the test of the subscriber line 12 including the telephone set 1 is executed by a test repeater 24 based on an instruction sent from the digital exchange.