Title:
DSL MODEM
Document Type and Number:
WIPO Patent Application WO/1999/052268
Kind Code:
A1
Abstract:
A POTS splitter (11) demultiplexes/combines a POTS signal and a DSL (high-speed digital communication) signal. A DSL terminal of the POTS splitter (11) is connected to a DSL modulator/demodulator (14). A DC converter (15) converts a POTS signal (Sa) fed to a terminal from an exchange (21) of a communication service station (20) into a predetermined dc voltage, which is fed as an operating power supply to the DSL modulator/demodulator (14). In such a way, a DSL (Digital Subscriber Line) modem capable of operating even in a power failure without any auxiliary power supply is realized. One of a POTS device and the DC converter (15) may be selectively connected to the POTS splitter (11) by means of a switch (16).
Inventors:
ANDOU NORIHIRO (JP)
ISHIGAMI MOTOHIRO (JP)
ISHIGAMI MOTOHIRO (JP)
Application Number:
PCT/JP1999/001651
Publication Date:
October 14, 1999
Filing Date:
March 31, 1999
Export Citation:
Assignee:
JAPAN AVIATION ELECTRON (JP)
ANDO NORIHIRO (JP)
ISHIGAMI MOTOHIRO (JP)
ANDO NORIHIRO (JP)
ISHIGAMI MOTOHIRO (JP)
International Classes:
H04M19/08; H04L12/10; H04M11/00; H04M11/06; (IPC1-7): H04M19/08; H04M11/00
Foreign References:
| JPH09275387A | 1997-10-21 | |||
| JPS60125052A | 1985-07-04 | |||
| JPS6281866A | 1987-04-15 |
Attorney, Agent or Firm:
Kusano, Takashi (Shinjuku 4-chome Shinjuku-ku Tokyo, JP)
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