JPH0157861B2 - - Google Patents
Info
- Publication number
- JPH0157861B2 JPH0157861B2 JP56028765A JP2876581A JPH0157861B2 JP H0157861 B2 JPH0157861 B2 JP H0157861B2 JP 56028765 A JP56028765 A JP 56028765A JP 2876581 A JP2876581 A JP 2876581A JP H0157861 B2 JPH0157861 B2 JP H0157861B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- battery
- switch
- line current
- fault
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
- H04M3/248—Arrangements for supervision, monitoring or testing with provision for checking the normal operation for metering arrangements or prepayment telephone systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Prepayment Telephone Systems (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2876581A JPS57143969A (en) | 1981-02-28 | 1981-02-28 | Monitoring method for fault of public telephone and fault signal sending circuit and fault signal monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2876581A JPS57143969A (en) | 1981-02-28 | 1981-02-28 | Monitoring method for fault of public telephone and fault signal sending circuit and fault signal monitoring circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57143969A JPS57143969A (en) | 1982-09-06 |
| JPH0157861B2 true JPH0157861B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1989-12-07 |
Family
ID=12257494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2876581A Granted JPS57143969A (en) | 1981-02-28 | 1981-02-28 | Monitoring method for fault of public telephone and fault signal sending circuit and fault signal monitoring circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57143969A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4567325A (en) * | 1983-12-30 | 1986-01-28 | At&T Technologies Inc. | Controller for a coin telephone set |
| JPS6437153A (en) * | 1987-08-03 | 1989-02-07 | Nippon Telegraph & Telephone | Trouble reporting and recovering device for public telephone |
| JPS6444665A (en) * | 1987-08-12 | 1989-02-17 | Nippon Telegraph & Telephone | Public telephone remote monitor system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5740610Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1976-04-30 | 1982-09-06 | ||
| JPS5923662B2 (ja) * | 1978-12-08 | 1984-06-04 | 沖電気工業株式会社 | 公衆電話機の遠隔監視方式 |
-
1981
- 1981-02-28 JP JP2876581A patent/JPS57143969A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57143969A (en) | 1982-09-06 |