Title:
TELEPHONE SYSTEM
Document Type and Number:
Japanese Patent JP3487794
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a telephone system which ensures a speech communication operation and also reduces power consumption when power interruption takes place.
SOLUTION: This telephone system is provided with a power supply feeding part 105 ensuring power supply to a telephone terminal, a power supply controlling part 104 selecting a power supply (battery 106 or commercial power supply) to the telephone terminal and also adjusting its voltage, a power interruption detecting part 102 detecting power interruption and a central controlling part 103 which acquires information about the power interruption from the part 102, also detects a call out from the telephone terminal and controls the part 104 based on the results.
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Inventors:
Takaya Tokuyoshi
Application Number:
JP34812999A
Publication Date:
January 19, 2004
Filing Date:
December 07, 1999
Export Citation:
Assignee:
NEC Access Technica, Ltd.
International Classes:
H04M19/00; H04Q3/58; (IPC1-7): H04M19/00; H04Q3/58
Domestic Patent References:
| JP3211944A |
Attorney, Agent or Firm:
Rock wall Fuyuki
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