KR900005714Y1 - 잘못놓여진 수화기의 자동검색 및 경보회로 - Google Patents
잘못놓여진 수화기의 자동검색 및 경보회로 Download PDFInfo
- Publication number
- KR900005714Y1 KR900005714Y1 KR2019870018093U KR870018093U KR900005714Y1 KR 900005714 Y1 KR900005714 Y1 KR 900005714Y1 KR 2019870018093 U KR2019870018093 U KR 2019870018093U KR 870018093 U KR870018093 U KR 870018093U KR 900005714 Y1 KR900005714 Y1 KR 900005714Y1
- Authority
- KR
- South Korea
- Prior art keywords
- handset
- output
- misplaced
- telephone
- alarm
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/82—Line monitoring circuits for call progress or status discrimination
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Abstract
Description
Claims (1)
- 전화기회로(1)에 접속된 수화기(7)에서 출력되는 비지음을 검색하는 비지음 검색 IC(2)를 전화국에서 보내주는 신호음을 검색하는 필터(3)에 연결하고, 필터(3)의 출력을 구형파로 변환시키는 비교기(4)의 출력과 상기 비지음 검색 IC(2)의 출력을 오아게이트(G1)의 입력에 각각 인가하여, 오아게이트(G1)의 출력을 타이머 및 카운터(50)를 통해 경보음을 발생하는 경보발생부(6)에 연결하는 것을 특징으로 하는 잘못놓여진 수화기의 자동검색 및 경보회로.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019870018093U KR900005714Y1 (ko) | 1987-10-23 | 1987-10-23 | 잘못놓여진 수화기의 자동검색 및 경보회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019870018093U KR900005714Y1 (ko) | 1987-10-23 | 1987-10-23 | 잘못놓여진 수화기의 자동검색 및 경보회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR890009719U KR890009719U (ko) | 1989-05-31 |
KR900005714Y1 true KR900005714Y1 (ko) | 1990-06-28 |
Family
ID=19268842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019870018093U Expired KR900005714Y1 (ko) | 1987-10-23 | 1987-10-23 | 잘못놓여진 수화기의 자동검색 및 경보회로 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR900005714Y1 (ko) |
-
1987
- 1987-10-23 KR KR2019870018093U patent/KR900005714Y1/ko not_active Expired
Also Published As
Publication number | Publication date |
---|---|
KR890009719U (ko) | 1989-05-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
UA0108 | Application for utility model registration |
Comment text: Application for Utility Model Registration Patent event code: UA01011R08D Patent event date: 19871023 |
|
UA0201 | Request for examination |
Patent event date: 19871023 Patent event code: UA02012R01D Comment text: Request for Examination of Application |
|
UG1501 | Laying open of application | ||
UG1604 | Publication of application |
Patent event code: UG16041S01I Comment text: Decision on Publication of Application Patent event date: 19900530 |
|
E701 | Decision to grant or registration of patent right | ||
UE0701 | Decision of registration |
Patent event date: 19900914 Comment text: Decision to Grant Registration Patent event code: UE07011S01D |
|
REGI | Registration of establishment | ||
UR0701 | Registration of establishment |
Patent event date: 19901121 Patent event code: UR07011E01D Comment text: Registration of Establishment |
|
UR1002 | Payment of registration fee |
Start annual number: 1 End annual number: 3 Payment date: 19901121 |
|
UR1001 | Payment of annual fee |
Payment date: 19930326 Start annual number: 4 End annual number: 4 |
|
UR1001 | Payment of annual fee |
Payment date: 19940530 Start annual number: 5 End annual number: 5 |
|
UR1001 | Payment of annual fee |
Payment date: 19950529 Start annual number: 6 End annual number: 6 |
|
UR1001 | Payment of annual fee |
Payment date: 19960523 Start annual number: 7 End annual number: 7 |
|
FPAY | Annual fee payment |
Payment date: 19970528 Year of fee payment: 8 |
|
UR1001 | Payment of annual fee |
Payment date: 19970528 Start annual number: 8 End annual number: 8 |
|
LAPS | Lapse due to unpaid annual fee | ||
UC1903 | Unpaid annual fee |