KR850006284A - Multi-Frequency Dial Long Distance Call Restrictor with Electronic Simple Switching System - Google Patents
Multi-Frequency Dial Long Distance Call Restrictor with Electronic Simple Switching System Download PDFInfo
- Publication number
- KR850006284A KR850006284A KR1019840000509A KR840000509A KR850006284A KR 850006284 A KR850006284 A KR 850006284A KR 1019840000509 A KR1019840000509 A KR 1019840000509A KR 840000509 A KR840000509 A KR 840000509A KR 850006284 A KR850006284 A KR 850006284A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- complex frequency
- long distance
- distance call
- processing unit
- Prior art date
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- Devices For Supply Of Signal Current (AREA)
Abstract
내용 없음No content
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
첨부된 도면은 본 발명의 복합주파수 다이알 장거리 통화제한 장치의 회로도.The accompanying drawings are circuit diagrams of a multi-frequency dial long distance call restriction device of the present invention.
*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
OP1: 연산증폭기 IC5: 계전기 구동회로 IC6: 복합주파수 디코우더 IC7,IC8: 랫치회로 CPU : 중앙 연산처리장치 M1 : 메모리소자 RL1-RLn : 계전기 L1,L2: 가입자 전화기선로 L2,L4: 국선 선로OP 1 : Operational Amplifier IC 5 : Relay Drive Circuit IC 6 : Complex Frequency Decoder IC 7 , IC 8 : Latch Circuit CPU: Central Processing Unit M1: Memory Device RL 1 -RLn: Relay L 1 , L 2 : Subscriber Telephone line L 2 , L 4 : CO line
Claims (1)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019840000509A KR850006284A (en) | 1984-02-03 | 1984-02-03 | Multi-Frequency Dial Long Distance Call Restrictor with Electronic Simple Switching System |
KR2019850014439U KR860000112Y1 (en) | 1984-02-03 | 1985-10-31 | Electronic switching system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019840000509A KR850006284A (en) | 1984-02-03 | 1984-02-03 | Multi-Frequency Dial Long Distance Call Restrictor with Electronic Simple Switching System |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019850014439U Division KR860000112Y1 (en) | 1984-02-03 | 1985-10-31 | Electronic switching system |
Publications (1)
Publication Number | Publication Date |
---|---|
KR850006284A true KR850006284A (en) | 1985-10-02 |
Family
ID=55315983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019840000509A KR850006284A (en) | 1984-02-03 | 1984-02-03 | Multi-Frequency Dial Long Distance Call Restrictor with Electronic Simple Switching System |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR850006284A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100371192B1 (en) * | 2001-04-04 | 2003-02-06 | 엘지전자 주식회사 | Method to identify available phone number |
KR20030012698A (en) * | 2001-08-03 | 2003-02-12 | 주식회사 한국밴통신 | External Telephone Call Control System. |
-
1984
- 1984-02-03 KR KR1019840000509A patent/KR850006284A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100371192B1 (en) * | 2001-04-04 | 2003-02-06 | 엘지전자 주식회사 | Method to identify available phone number |
KR20030012698A (en) * | 2001-08-03 | 2003-02-12 | 주식회사 한국밴통신 | External Telephone Call Control System. |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
E902 | Notification of reason for refusal | ||
WICV | Withdrawal of application forming a basis of a converted application |