JPH0234502B2 - - Google Patents
Info
- Publication number
- JPH0234502B2 JPH0234502B2 JP56204917A JP20491781A JPH0234502B2 JP H0234502 B2 JPH0234502 B2 JP H0234502B2 JP 56204917 A JP56204917 A JP 56204917A JP 20491781 A JP20491781 A JP 20491781A JP H0234502 B2 JPH0234502 B2 JP H0234502B2
- Authority
- JP
- Japan
- Prior art keywords
- subscriber
- transformer
- midpoint
- relay
- primary winding
- 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 - Lifetime
Links
- 238000004804 winding Methods 0.000 claims description 27
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 5
- 230000001052 transient effect Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/02—Calling substations, e.g. by ringing
- H04M3/06—Calling substations, e.g. by ringing the calling signal being supplied from the subscriber's line circuit
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20491781A JPS58105660A (ja) | 1981-12-18 | 1981-12-18 | 呼出信号送出回路 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20491781A JPS58105660A (ja) | 1981-12-18 | 1981-12-18 | 呼出信号送出回路 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58105660A JPS58105660A (ja) | 1983-06-23 |
| JPH0234502B2 true JPH0234502B2 (US06268120-20010731-C00013.png) | 1990-08-03 |
Family
ID=16498510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20491781A Granted JPS58105660A (ja) | 1981-12-18 | 1981-12-18 | 呼出信号送出回路 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58105660A (US06268120-20010731-C00013.png) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55117393A (en) * | 1979-03-02 | 1980-09-09 | Hitachi Ltd | Signal processor for subscriber circuit |
-
1981
- 1981-12-18 JP JP20491781A patent/JPS58105660A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55117393A (en) * | 1979-03-02 | 1980-09-09 | Hitachi Ltd | Signal processor for subscriber circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58105660A (ja) | 1983-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS59181734A (ja) | 無線電話方式 | |
| US4536618A (en) | Telephone line interface | |
| JPH04233891A (ja) | ボタン電話用インタフェース装置 | |
| JPH0234502B2 (US06268120-20010731-C00013.png) | ||
| US3730999A (en) | Telephone ring-trip circuit | |
| JPH02501525A (ja) | 被呼加入者に対する呼出信号の接続及び切離装置 | |
| US3967076A (en) | Call denial circuit for key telephone systems | |
| JPH0323747Y2 (US06268120-20010731-C00013.png) | ||
| JPS6039970A (ja) | 極性反転検出回路 | |
| JPH0119487Y2 (US06268120-20010731-C00013.png) | ||
| US5940500A (en) | Series equipment with DC line hold transfer | |
| JPS589411Y2 (ja) | 電話装置におけるハウリング防止回路 | |
| JPH066439A (ja) | プラグ−イン電話システムの補助リンガのための音響的フィードバックの抑制装置 | |
| JPS584294Y2 (ja) | 呼出信号の送出制御回路 | |
| JPS589412Y2 (ja) | 電話機の不要な信号器音サプレサ | |
| JPS5826871B2 (ja) | ト−キ送出方式 | |
| JPS6259500B2 (US06268120-20010731-C00013.png) | ||
| JPS6342606Y2 (US06268120-20010731-C00013.png) | ||
| JPS6358420B2 (US06268120-20010731-C00013.png) | ||
| JPH0310555A (ja) | 網制御装置 | |
| JPS6228913B2 (US06268120-20010731-C00013.png) | ||
| JPS62241493A (ja) | ル−プ検出回路 | |
| JPS6143052A (ja) | 加入者回路 | |
| JPH0258957A (ja) | 網制御装置 | |
| JPS59262A (ja) | 時分割交換機の異常輻「そう」時の制御方式 |
