JPH0415343U - - Google Patents
Info
- Publication number
- JPH0415343U JPH0415343U JP5465290U JP5465290U JPH0415343U JP H0415343 U JPH0415343 U JP H0415343U JP 5465290 U JP5465290 U JP 5465290U JP 5465290 U JP5465290 U JP 5465290U JP H0415343 U JPH0415343 U JP H0415343U
- Authority
- JP
- Japan
- Prior art keywords
- power outage
- telephone
- central office
- office line
- detection means
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Monitoring And Testing Of Exchanges (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Description
第１図は本考案による停電切替回路のボタン電
話装置への適用例を示す実施例のブロツク図であ
る。
１００……主装置、１１０（１）〜１１０（ｎ
）……局線回路、１１５……ハイウエイスイツチ
、１１６……制御回路、１１８……電流切替回路
、１１９……バツクアツプバツテリー、１２０…
…停電検出回路、１２１……主装置側通話電流検
出リレー、２００（１）〜２００（２）……ボタ
ン電話機、２１３……ボタン電話機制御回路、２
２１……停電通話回路、２２２……停電ブザー、
２２３……ボタン電話機通話電流検出リレー。
FIG. 1 is a block diagram of an embodiment showing an example of application of a power outage switching circuit according to the present invention to a key telephone device. 100...Main device, 110(1) to 110(n
)... Office line circuit, 115... Highway switch, 116... Control circuit, 118... Current switching circuit, 119... Backup battery, 120...
... Power outage detection circuit, 121 ... Main unit side call current detection relay, 200 (1) to 200 (2) ... Button telephone, 213 ... Button telephone control circuit, 2
21...Power outage call circuit, 222...Power outage buzzer,
223...Button telephone call current detection relay.
Claims (1)
して接続され、停電時には停電用通話路への切り
替えによつて前記局線と前記電話機が接続される
ように構成されている電話装置の停電切替回路に
おいて、 前記停電通話路の前記電話機側に設けられ、前
記局線からの通話電流を検出する検出手段と、 前記検出手段による通話電流の検出に応答して
、前記電話機回路を前記停電用通話路と接続する
切替手段と、 を備えて成ることを特徴とする電話装置の停電切
替回路。[Scope of claim for utility model registration] A plurality of telephones are connected via a bus through a central office line and a main device, and in the event of a power outage, the central office line and the telephone are connected by switching to a power outage call path. A power outage switching circuit for a telephone device configured to include: a detection means provided on the telephone side of the power outage communication path for detecting a communication current from the central office line; and a detection means responsive to the detection of communication current by the detection means. A power outage switching circuit for a telephone device, comprising: switching means for connecting the telephone circuit to the power outage communication path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990054652U JP2513432Y2 (en) | 1990-05-28 | 1990-05-28 | Telephone device power failure switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990054652U JP2513432Y2 (en) | 1990-05-28 | 1990-05-28 | Telephone device power failure switching circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0415343U true JPH0415343U (en) | 1992-02-07 |
| JP2513432Y2 JP2513432Y2 (en) | 1996-10-09 |
Family
ID=31576905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990054652U Expired - Lifetime JP2513432Y2 (en) | 1990-05-28 | 1990-05-28 | Telephone device power failure switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2513432Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6242697A (en) * | 1985-08-20 | 1987-02-24 | Matsushita Electric Ind Co Ltd | Key telephone set |
| JPS63164561A (en) * | 1986-12-25 | 1988-07-07 | Fujitsu Ltd | Telephone terminal equipment for power failure |
| JPS63283340A (en) * | 1987-05-15 | 1988-11-21 | Nippon Telegr & Teleph Corp <Ntt> | Power failure telephone call security system for telephone system |
-
1990
- 1990-05-28 JP JP1990054652U patent/JP2513432Y2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6242697A (en) * | 1985-08-20 | 1987-02-24 | Matsushita Electric Ind Co Ltd | Key telephone set |
| JPS63164561A (en) * | 1986-12-25 | 1988-07-07 | Fujitsu Ltd | Telephone terminal equipment for power failure |
| JPS63283340A (en) * | 1987-05-15 | 1988-11-21 | Nippon Telegr & Teleph Corp <Ntt> | Power failure telephone call security system for telephone system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2513432Y2 (en) | 1996-10-09 |
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