JPS57207470A - Public telephone set - Google Patents
Public telephone setInfo
- Publication number
- JPS57207470A JPS57207470A JP9219581A JP9219581A JPS57207470A JP S57207470 A JPS57207470 A JP S57207470A JP 9219581 A JP9219581 A JP 9219581A JP 9219581 A JP9219581 A JP 9219581A JP S57207470 A JPS57207470 A JP S57207470A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- channel
- loop
- channel loop
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 abstract 6
- 238000001514 detection method Methods 0.000 abstract 3
- 230000005284 excitation Effects 0.000 abstract 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 |
---|---|---|---|
JP9219581A JPS57207470A (en) | 1981-06-17 | 1981-06-17 | Public telephone set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9219581A JPS57207470A (en) | 1981-06-17 | 1981-06-17 | Public telephone set |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57207470A true JPS57207470A (en) | 1982-12-20 |
JPH0115186B2 JPH0115186B2 (enrdf_load_stackoverflow) | 1989-03-16 |
Family
ID=14047658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9219581A Granted JPS57207470A (en) | 1981-06-17 | 1981-06-17 | Public telephone set |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57207470A (enrdf_load_stackoverflow) |
-
1981
- 1981-06-17 JP JP9219581A patent/JPS57207470A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0115186B2 (enrdf_load_stackoverflow) | 1989-03-16 |
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