JPS54159806A - Ringing trunk - Google Patents
Ringing trunkInfo
- Publication number
- JPS54159806A JPS54159806A JP6860378A JP6860378A JPS54159806A JP S54159806 A JPS54159806 A JP S54159806A JP 6860378 A JP6860378 A JP 6860378A JP 6860378 A JP6860378 A JP 6860378A JP S54159806 A JPS54159806 A JP S54159806A
- Authority
- JP
- Japan
- Prior art keywords
- grounded
- resistance
- ringing
- constitution
- relay contact
- 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
Abstract
PURPOSE: To simplify constitution and improve reliability by controlling respective functions of calling of a called telephone set and response of a called receiver by one response detection element in the ringing trunk of the trip circuit of a telepone exchange.
CONSTITUTION: Capacitor CO and intra-office ringing source 16 Hz IR, diodes D1 and resistance R1, and diode DO and relay A are grounded through switching circuit 10 which is connected to signal transmission line A1 and consists of A relay contact a1 and R relay contact r. Further, resistance RO(3) and DC power source 4 are connected to signal line B1 and are grounded.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6860378A JPS54159806A (en) | 1978-06-07 | 1978-06-07 | Ringing trunk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6860378A JPS54159806A (en) | 1978-06-07 | 1978-06-07 | Ringing trunk |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54159806A true JPS54159806A (en) | 1979-12-18 |
JPS579265B2 JPS579265B2 (en) | 1982-02-20 |
Family
ID=13378517
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6860378A Granted JPS54159806A (en) | 1978-06-07 | 1978-06-07 | Ringing trunk |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54159806A (en) |
-
1978
- 1978-06-07 JP JP6860378A patent/JPS54159806A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS579265B2 (en) | 1982-02-20 |
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