JPS56160171A - Signal repeating device - Google Patents

Signal repeating device

Info

Publication number
JPS56160171A
JPS56160171A JP6374980A JP6374980A JPS56160171A JP S56160171 A JPS56160171 A JP S56160171A JP 6374980 A JP6374980 A JP 6374980A JP 6374980 A JP6374980 A JP 6374980A JP S56160171 A JPS56160171 A JP S56160171A
Authority
JP
Japan
Prior art keywords
earth
pso
terminal
signal repeating
coupler
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
JP6374980A
Other languages
Japanese (ja)
Other versions
JPS6359577B2 (en
Inventor
Mikiro Sakurai
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6374980A priority Critical patent/JPS56160171A/en
Publication of JPS56160171A publication Critical patent/JPS56160171A/en
Publication of JPS6359577B2 publication Critical patent/JPS6359577B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
    • H04Q1/36—Pulse-correcting arrangements, e.g. for reducing effects due to interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To enhance the controllability with a miniature and light-weight structure of a signal repeating device, by operating previsouly a change-over switch according to the using conditions and reeiving the state change of a preceding an succeeding devices at a hard circuit, and executing a soft control through a control circuit. CONSTITUTION:When a telephone receiver is picked up, a direct current flows in a signal repeating device by a route of earth-B switch 10-photocoupler PSO-B switch 7. Thus the coupler PSO lights. A direct current flows at the light receiving part of the coupler PSO via a resistance R13 to vary the voltage at the terminal IN4 in a CPU. With a variation of the terminal OUTO, the transistors TR4 and TR5 are driven. Then the earth is sent by a route of earth-transistor TR5-SS terminal. At the same time, a carrier device receives the earth and transmits the outgoing signal of a subscriber to its opposite carrier device.
JP6374980A 1980-05-14 1980-05-14 Signal repeating device Granted JPS56160171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6374980A JPS56160171A (en) 1980-05-14 1980-05-14 Signal repeating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6374980A JPS56160171A (en) 1980-05-14 1980-05-14 Signal repeating device

Publications (2)

Publication Number Publication Date
JPS56160171A true JPS56160171A (en) 1981-12-09
JPS6359577B2 JPS6359577B2 (en) 1988-11-21

Family

ID=13238356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6374980A Granted JPS56160171A (en) 1980-05-14 1980-05-14 Signal repeating device

Country Status (1)

Country Link
JP (1) JPS56160171A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58162159A (en) * 1982-03-23 1983-09-26 Nec Corp Signal repeating device
JPS60158355U (en) * 1984-03-29 1985-10-22 日本電気株式会社 Portable signal repeater

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057103A (en) * 1973-09-17 1975-05-19
JPS5545271A (en) * 1978-09-27 1980-03-29 Fujitsu Ltd Connection signal conversion unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057103A (en) * 1973-09-17 1975-05-19
JPS5545271A (en) * 1978-09-27 1980-03-29 Fujitsu Ltd Connection signal conversion unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58162159A (en) * 1982-03-23 1983-09-26 Nec Corp Signal repeating device
JPS60158355U (en) * 1984-03-29 1985-10-22 日本電気株式会社 Portable signal repeater

Also Published As

Publication number Publication date
JPS6359577B2 (en) 1988-11-21

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