JPS55162691A - Control system for communication channel - Google Patents

Control system for communication channel

Info

Publication number
JPS55162691A
JPS55162691A JP7037679A JP7037679A JPS55162691A JP S55162691 A JPS55162691 A JP S55162691A JP 7037679 A JP7037679 A JP 7037679A JP 7037679 A JP7037679 A JP 7037679A JP S55162691 A JPS55162691 A JP S55162691A
Authority
JP
Japan
Prior art keywords
circuit
voltage
output
time sharing
main wire
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
Application number
JP7037679A
Other languages
Japanese (ja)
Other versions
JPS5854558B2 (en
Inventor
Koichi Sekiguchi
Hideaki Naganami
Kazuyuki Yamamoto
Teruyuki Kubo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iwatsu Electric Co Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Iwatsu Electric Co Ltd
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iwatsu Electric Co Ltd, Nippon Telegraph and Telephone Corp filed Critical Iwatsu Electric Co Ltd
Priority to JP7037679A priority Critical patent/JPS5854558B2/en
Publication of JPS55162691A publication Critical patent/JPS55162691A/en
Publication of JPS5854558B2 publication Critical patent/JPS5854558B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages

Abstract

PURPOSE:To achieve excellent communication, by controlling the communication channel switch consisting of PNPN semiconductor in time sharing pulse, connecting the main wire with the telephone set and blocking the production of noise, when the voltage from the main wire is more than the set value. CONSTITUTION:When the telephone set 6 sends the hook switch information to the time sharing pulse generating circuit 3, the circuit 3 applies the time sharing pulse signal to the control terminal of the switch circuit 4 and the voltage on the main wire is fed to the voltage detection circuit 5. When a voltage more than preset voltage is fed to the circuit 5, a signal is output to the gate circuit 2. Further, the circuit 2 receives the output of the circuit 3 at one input terminal and another input terminal receives the output of the circuit 5 to control the communication channel switch 1 consisting of PNPN semiconductor elements resulting in connecting the main wire with the telephone set 6 into conductive state. After that, the output of the circuit 5 is disconnected to prevent the time sharing pulse from the circuit 3 to be input to the circuit 2. Thus, the production of noise is blocked for excellent communication.
JP7037679A 1979-06-05 1979-06-05 Call path control method Expired JPS5854558B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7037679A JPS5854558B2 (en) 1979-06-05 1979-06-05 Call path control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7037679A JPS5854558B2 (en) 1979-06-05 1979-06-05 Call path control method

Publications (2)

Publication Number Publication Date
JPS55162691A true JPS55162691A (en) 1980-12-18
JPS5854558B2 JPS5854558B2 (en) 1983-12-05

Family

ID=13429652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7037679A Expired JPS5854558B2 (en) 1979-06-05 1979-06-05 Call path control method

Country Status (1)

Country Link
JP (1) JPS5854558B2 (en)

Also Published As

Publication number Publication date
JPS5854558B2 (en) 1983-12-05

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