JPS59224996A - ボタン電話装置における監視回路 - Google Patents
ボタン電話装置における監視回路Info
- Publication number
- JPS59224996A JPS59224996A JP9750884A JP9750884A JPS59224996A JP S59224996 A JPS59224996 A JP S59224996A JP 9750884 A JP9750884 A JP 9750884A JP 9750884 A JP9750884 A JP 9750884A JP S59224996 A JPS59224996 A JP S59224996A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- extension calling
- extension
- supervised
- location
- 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
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9750884A JPS59224996A (ja) | 1984-05-17 | 1984-05-17 | ボタン電話装置における監視回路 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9750884A JPS59224996A (ja) | 1984-05-17 | 1984-05-17 | ボタン電話装置における監視回路 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3955679A Division JPS55132165A (en) | 1979-04-02 | 1979-04-02 | Supervising circuit of button telephone set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59224996A true JPS59224996A (ja) | 1984-12-17 |
| JPS616593B2 JPS616593B2 (enExample) | 1986-02-27 |
Family
ID=14194195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9750884A Granted JPS59224996A (ja) | 1984-05-17 | 1984-05-17 | ボタン電話装置における監視回路 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59224996A (enExample) |
-
1984
- 1984-05-17 JP JP9750884A patent/JPS59224996A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS616593B2 (enExample) | 1986-02-27 |
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