JPS5639666A - Four-wire operator's talking circuit - Google Patents

Four-wire operator's talking circuit

Info

Publication number
JPS5639666A
JPS5639666A JP11505679A JP11505679A JPS5639666A JP S5639666 A JPS5639666 A JP S5639666A JP 11505679 A JP11505679 A JP 11505679A JP 11505679 A JP11505679 A JP 11505679A JP S5639666 A JPS5639666 A JP S5639666A
Authority
JP
Japan
Prior art keywords
operator
hyb14
circuit
amplifier
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.)
Pending
Application number
JP11505679A
Other languages
Japanese (ja)
Inventor
Yusuke Ogata
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP11505679A priority Critical patent/JPS5639666A/en
Publication of JPS5639666A publication Critical patent/JPS5639666A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Abstract

PURPOSE:To realize a lightweight and miniature circuit by connecting an operator's handset to one hydrid via an amplifier. CONSTITUTION:Operator's transmitter 2 is connected to two-wire terminal A of hybrid HYB14 via amplifier 3b of operator's talking circuit 12, operator's receiver 1 is connected to terminal B, to which the balancing connection network of HYB14 is connected, via amplifier 3a, and respective talking lines of the four-wire circuit are connected to remaining terminals C and D of HYB14, thereby coupling them with operator's trunk 13. Then, the impedance of amplifiers 3a and 3b viewed from HYB14 is matched. Therefore, the side tone of the output of transmitter 2 is transferred to receiver 1 and stable transmission and reception to and from trunk 13 can be carried out.
JP11505679A 1979-09-07 1979-09-07 Four-wire operator's talking circuit Pending JPS5639666A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11505679A JPS5639666A (en) 1979-09-07 1979-09-07 Four-wire operator's talking circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11505679A JPS5639666A (en) 1979-09-07 1979-09-07 Four-wire operator's talking circuit

Publications (1)

Publication Number Publication Date
JPS5639666A true JPS5639666A (en) 1981-04-15

Family

ID=14653074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11505679A Pending JPS5639666A (en) 1979-09-07 1979-09-07 Four-wire operator's talking circuit

Country Status (1)

Country Link
JP (1) JPS5639666A (en)

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