JPS51150907A - Subsriber line signal transmission system - Google Patents

Subsriber line signal transmission system

Info

Publication number
JPS51150907A
JPS51150907A JP7453575A JP7453575A JPS51150907A JP S51150907 A JPS51150907 A JP S51150907A JP 7453575 A JP7453575 A JP 7453575A JP 7453575 A JP7453575 A JP 7453575A JP S51150907 A JPS51150907 A JP S51150907A
Authority
JP
Japan
Prior art keywords
signal transmission
transmission system
line signal
subsriber
subsriber line
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.)
Pending
Application number
JP7453575A
Other languages
Japanese (ja)
Inventor
Kozo Kamata
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7453575A priority Critical patent/JPS51150907A/en
Priority to US05/695,760 priority patent/US4150260A/en
Priority to GB24968/76A priority patent/GB1554421A/en
Priority to DE2627140A priority patent/DE2627140C3/en
Priority to NLAANVRAGE7606570,A priority patent/NL178117C/en
Priority to CA255,082A priority patent/CA1057437A/en
Publication of JPS51150907A publication Critical patent/JPS51150907A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To eliminate the relay contract group employed to switch the subscriber's circuit to signal source, thereby achieving compact design and improving transmission qualith such as ground balance.
JP7453575A 1975-06-18 1975-06-20 Subsriber line signal transmission system Pending JPS51150907A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP7453575A JPS51150907A (en) 1975-06-20 1975-06-20 Subsriber line signal transmission system
US05/695,760 US4150260A (en) 1975-06-18 1976-06-14 Subscriber's circuit for four-wire-system local switch
GB24968/76A GB1554421A (en) 1975-06-18 1976-06-16 Subscriber's circuit for four-wire-system local switch
DE2627140A DE2627140C3 (en) 1975-06-18 1976-06-16 Hybrid circuit in subscriber circuit
NLAANVRAGE7606570,A NL178117C (en) 1975-06-18 1976-06-17 COUPLING DEVICE FOR FORMING A COUPLING BETWEEN A FOUR-WAY PATH OF A TIME MULTIPLEX SWITCH NETWORK AND A TWO-WIRE SUBSCRIBER LINE.
CA255,082A CA1057437A (en) 1975-06-18 1976-06-17 Subscriber's circuit for four-wire-system local switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7453575A JPS51150907A (en) 1975-06-20 1975-06-20 Subsriber line signal transmission system

Publications (1)

Publication Number Publication Date
JPS51150907A true JPS51150907A (en) 1976-12-24

Family

ID=13550069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7453575A Pending JPS51150907A (en) 1975-06-18 1975-06-20 Subsriber line signal transmission system

Country Status (1)

Country Link
JP (1) JPS51150907A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180170U (en) * 1985-04-04 1985-11-29 日通工株式会社 Switching device signal circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700831A (en) * 1970-01-13 1972-10-24 Philips Corp Hybrid circuit
JPS5132112A (en) * 1974-09-12 1976-03-18 Oki Electric Ind Co Ltd KANYUSHAKAIRO

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700831A (en) * 1970-01-13 1972-10-24 Philips Corp Hybrid circuit
JPS5132112A (en) * 1974-09-12 1976-03-18 Oki Electric Ind Co Ltd KANYUSHAKAIRO

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180170U (en) * 1985-04-04 1985-11-29 日通工株式会社 Switching device signal circuit

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