| 摘要 |
PURPOSE: A method for winding a coil of a jack type splitter used for both ADSL(Asymmetrical Digital Subscriber Line) and a VDSL(Very high data rate Digital Subscriber Line) is provided to guarantee a maximum high speed down stream and reduce a cost by using one splitter for both an ADSL and VDSL. CONSTITUTION: Subscriber lines(LINE TIP, LINE RING) transmitting a voice signal and a DSL data signal are connected to telephone lines(PSTN TIP, PSTN RING) and system lines of an Internet communication system. A low pass filter for cutting off the DSL data signal and a modem for cutting off inflow of a voice signal are provided on the telephone lines(PSTN TIP,PSTN RING). The low pass filter includes coils(L1,L2) and capacitors(C1-C4). The coil L1 includes two coils(L11,L12) disposed in series on the telephone line(PSTN TIP) and two coils(L13,L14) disposed in series on the telephone line(PSTN RING). The coil(L2) includes two coils(L22,L24) disposed in series on the telephone line(PSTN TIP) and two coils(L23,L24) disposed in series on the telephone line(PSTN RING). The capacitors(C1,C2) are disposed between the telephone lines(PSTN TIP,PSTN RING) at a front stage of the coils(L21,L23) and at a rear stage of the coils(L22,L24). The capacitor(C3) is disposed in parallel to the coils(L21,L22). The capacitor(C4) is disposed in parallel to coils(L23,L24).
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