JPS64852A - Alarm system using telephone set - Google Patents
Alarm system using telephone setInfo
- Publication number
- JPS64852A JPS64852A JP5338888A JP5338888A JPS64852A JP S64852 A JPS64852 A JP S64852A JP 5338888 A JP5338888 A JP 5338888A JP 5338888 A JP5338888 A JP 5338888A JP S64852 A JPS64852 A JP S64852A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- alarm
- telephone
- signal
- turning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
PURPOSE: To transmit the alarm from an alarm sensor to telephone slave machines by using a call signal oscillating circuit part provided in a main telephone circuit as an alarm tone emitting means and using general telephone slave machines.
CONSTITUTION: When the contact of an optional alarm sensor 14, for example, a fire sensor 14A is turned on, this turning-on signal is transmitted to an alarm circuit 36 of a first telephone slave machine 112. The alarm circuit 36 transmits this turning-on signal from an information output part 39 to a control circuit 16 through an information input part 33 in a main telephone circuit 15. When the turning-on signal of the fire sensor 14A is transmitted to the circuit 16, the circuit 16 switches relays r13∼r53 corresponding to all telephone slave machines 12 to the side of a call signal oscillator 26 and switches relays r14∼r54 to the side of an off-hook detector 27 to ring all telephone slave machines 12 at a time.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5338888A JPS64852A (en) | 1987-03-23 | 1988-03-07 | Alarm system using telephone set |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-69922 | 1987-03-23 | ||
JP6992287 | 1987-03-23 | ||
JP5338888A JPS64852A (en) | 1987-03-23 | 1988-03-07 | Alarm system using telephone set |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01852A JPH01852A (en) | 1989-01-05 |
JPS64852A true JPS64852A (en) | 1989-01-05 |
Family
ID=26394102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5338888A Pending JPS64852A (en) | 1987-03-23 | 1988-03-07 | Alarm system using telephone set |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS64852A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0678350A (en) * | 1992-08-25 | 1994-03-18 | Matsushita Electric Works Ltd | Home telephone system having telephone exchange function |
JP2007228632A (en) * | 2007-05-24 | 2007-09-06 | Hitachi Communication Technologies Ltd | Information notification system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6115868B2 (en) * | 1977-11-21 | 1986-04-26 | Mitsubishi Chem Ind |
-
1988
- 1988-03-07 JP JP5338888A patent/JPS64852A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6115868B2 (en) * | 1977-11-21 | 1986-04-26 | Mitsubishi Chem Ind |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0678350A (en) * | 1992-08-25 | 1994-03-18 | Matsushita Electric Works Ltd | Home telephone system having telephone exchange function |
JP2007228632A (en) * | 2007-05-24 | 2007-09-06 | Hitachi Communication Technologies Ltd | Information notification system |
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