JPS52101907A - Shunt type current switching scanning method - Google Patents
Shunt type current switching scanning methodInfo
- Publication number
- JPS52101907A JPS52101907A JP1793376A JP1793376A JPS52101907A JP S52101907 A JPS52101907 A JP S52101907A JP 1793376 A JP1793376 A JP 1793376A JP 1793376 A JP1793376 A JP 1793376A JP S52101907 A JPS52101907 A JP S52101907A
- Authority
- JP
- Japan
- Prior art keywords
- current switching
- scanning method
- type current
- switching scanning
- shunt type
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
PURPOSE:To distinguish originating call of a telephone and to economize the device by providing a shunt resistor in a current switching scanning circuit in an automatic telephone exchange.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1793376A JPS52101907A (en) | 1976-02-23 | 1976-02-23 | Shunt type current switching scanning method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1793376A JPS52101907A (en) | 1976-02-23 | 1976-02-23 | Shunt type current switching scanning method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS52101907A true JPS52101907A (en) | 1977-08-26 |
JPS5439687B2 JPS5439687B2 (en) | 1979-11-29 |
Family
ID=11957566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1793376A Granted JPS52101907A (en) | 1976-02-23 | 1976-02-23 | Shunt type current switching scanning method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS52101907A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5466784U (en) * | 1977-10-19 | 1979-05-11 |
-
1976
- 1976-02-23 JP JP1793376A patent/JPS52101907A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5466784U (en) * | 1977-10-19 | 1979-05-11 |
Also Published As
Publication number | Publication date |
---|---|
JPS5439687B2 (en) | 1979-11-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54136166A (en) | Semiconductor switch and telephone subscriber*s line circuit | |
FR2335051A1 (en) | CIRCUIT DEVICE TO REDUCE THE POWER DISSIPED ON CUTTING A SWITCHING TRANSISTOR, AND TO ACCELERATE ITS GOING TO THE CONDUCTIVE STATE | |
IT1131255B (en) | CURRENT DETECTION CIRCUIT COMPLEX FOR AN AUTOMATIC TELEPHONE SWITCHBOARD | |
JPS52139302A (en) | Automatic circuit switching unit | |
JPS5218108A (en) | Conference telephone circuit | |
JPS52101907A (en) | Shunt type current switching scanning method | |
JPS51147103A (en) | Subscriber*s circuit with key dialling device energized via connection wire | |
JPS5332605A (en) | Telephone line circuit | |
ATA183778A (en) | CIRCUIT ARRANGEMENT FOR CALL VOLTAGE IN TELEPHONE SWITCHING SYSTEMS | |
JPS52101905A (en) | Parallel drive circuit in current switching scanning method | |
JPS53117922A (en) | Absence reception voice answer skip system | |
JPS51115712A (en) | Call detection method in automatic telephone exchange | |
JPS5368010A (en) | Ring trip circuit | |
JPS5355905A (en) | Automatic dialing system | |
FR2330237A1 (en) | TELEPHONE AND PABX SWITCHING CIRCUIT INCLUDING SUCH A CIRCUIT | |
JPS51147905A (en) | Busy indication circuit in a switch-box type additional telephone set | |
JPS5368902A (en) | Telephone circuit calling device | |
IL53543A (en) | D.c.ringing current arrangement for telephone substations | |
JPS5216106A (en) | Telephone call unit | |
JPS5238801A (en) | Automatic call connection device | |
JPS52101903A (en) | Forecasting tone sending method | |
JPS5436103A (en) | Automatic answering telephone control circuit | |
JPS52100803A (en) | Call wating system | |
JPS53122304A (en) | Key telephone set | |
JPS5392610A (en) | Attachment connection circuit |