Title:
COMMUNICATION SYSTEM AND INTERCOM SYSTEM FOR MULTIPLE-FAMILY DWELLING
Document Type and Number:
WIPO Patent Application WO/2012/081707
Kind Code:
A1
Abstract:
A communication system comprises a communication path, the communication path further comprising: secondary lines for a plurality of systems to which one or a plurality of communication terminals are branch connected; and a primary line to which the plurality of secondary line systems are respectively branch connected via a plurality of branch apparatuses. Each of the plurality of branch apparatuses further comprises: a pair of primary line connection units which are inserted in series along the primary line; a secondary line connection unit to which the secondary line to the system extension device is connected; and a branch circuit for branching a signal traveling between the pair of primary line connection units to the secondary line connection unit.
Inventors:
MIZUTA TOMOAKI (JP)
MAESHIMA MASAYUKI (JP)
FURUYA TOMOHIDE (JP)
UMEDA NAOKI (JP)
MAEDA MITSURU (JP)
HYOSU HARUHIKO (JP)
MAESHIMA MASAYUKI (JP)
FURUYA TOMOHIDE (JP)
UMEDA NAOKI (JP)
MAEDA MITSURU (JP)
HYOSU HARUHIKO (JP)
Application Number:
PCT/JP2011/079241
Publication Date:
June 21, 2012
Filing Date:
December 16, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
MIZUTA TOMOAKI (JP)
MAESHIMA MASAYUKI (JP)
FURUYA TOMOHIDE (JP)
UMEDA NAOKI (JP)
MAEDA MITSURU (JP)
HYOSU HARUHIKO (JP)
MIZUTA TOMOAKI (JP)
MAESHIMA MASAYUKI (JP)
FURUYA TOMOHIDE (JP)
UMEDA NAOKI (JP)
MAEDA MITSURU (JP)
HYOSU HARUHIKO (JP)
International Classes:
H04M9/00; H04B3/54
Foreign References:
| JP2008047974A | 2008-02-28 | |||
| JP2005252827A | 2005-09-15 | |||
| JP2010109611A | 2010-05-13 | |||
| JP2002094974A | 2002-03-29 | |||
| JP2010109750A | 2010-05-13 | |||
| JP2005184128A | 2005-07-07 |
Attorney, Agent or Firm:
NISHIKAWA, Yoshikiyo et al. (JP)
Yoshikiyo Nishikawa (JP)
Yoshikiyo Nishikawa (JP)
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Claims: