JPS6335148B2 - - Google Patents
Info
- Publication number
- JPS6335148B2 JPS6335148B2 JP18446380A JP18446380A JPS6335148B2 JP S6335148 B2 JPS6335148 B2 JP S6335148B2 JP 18446380 A JP18446380 A JP 18446380A JP 18446380 A JP18446380 A JP 18446380A JP S6335148 B2 JPS6335148 B2 JP S6335148B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- polarity
- relay
- call
- coin
- 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
- 238000012544 monitoring process Methods 0.000 claims description 23
- 239000004065 semiconductor Substances 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000004913 activation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
- H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
- H04M17/023—Circuit arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Prepayment Telephone Systems (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18446380A JPS57107672A (en) | 1980-12-25 | 1980-12-25 | Public telephone circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18446380A JPS57107672A (en) | 1980-12-25 | 1980-12-25 | Public telephone circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57107672A JPS57107672A (en) | 1982-07-05 |
| JPS6335148B2 true JPS6335148B2 (cs) | 1988-07-13 |
Family
ID=16153587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18446380A Granted JPS57107672A (en) | 1980-12-25 | 1980-12-25 | Public telephone circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57107672A (cs) |
-
1980
- 1980-12-25 JP JP18446380A patent/JPS57107672A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57107672A (en) | 1982-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3436488A (en) | Line circuit for a key telephone system utilizing a single multifunction supervisory relay | |
| US3514544A (en) | Party line privacy device | |
| US4001520A (en) | Hold circuit for telephones | |
| US3760101A (en) | Coin telephone circuit | |
| US3946146A (en) | Discrete ringing detector for use in key telephone systems | |
| JPS6335148B2 (cs) | ||
| JPS6318205Y2 (cs) | ||
| JPS6328385B2 (cs) | ||
| US3649772A (en) | Line card circuit for a key telephone system | |
| JPS62295555A (ja) | 公衆電話機 | |
| JPS6337547B2 (cs) | ||
| US3046341A (en) | Postpay paystation circuit providing special service | |
| JPS6342606Y2 (cs) | ||
| JPS6312608Y2 (cs) | ||
| JPS6325792Y2 (cs) | ||
| JPS61251266A (ja) | 公衆電話機の話中音送出回路 | |
| JPS61201557A (ja) | 公衆電話機 | |
| US4445004A (en) | Key telephone line circuit with improved hold circuit | |
| JPH0127316Y2 (cs) | ||
| CA1173576A (en) | Key telephone line circuit | |
| US3748404A (en) | Telephone line circuit embodying a triggerable avalanche device | |
| JPH0453087Y2 (cs) | ||
| JPH0246141Y2 (cs) | ||
| JPH0218621Y2 (cs) | ||
| JPS6325793Y2 (cs) |