JPS5596740A - Channel circuit - Google Patents

Channel circuit

Info

Publication number
JPS5596740A
JPS5596740A JP342579A JP342579A JPS5596740A JP S5596740 A JPS5596740 A JP S5596740A JP 342579 A JP342579 A JP 342579A JP 342579 A JP342579 A JP 342579A JP S5596740 A JPS5596740 A JP S5596740A
Authority
JP
Japan
Prior art keywords
gain
signal
subscriber
terminal
level
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
JP342579A
Other languages
Japanese (ja)
Inventor
Izumi Kawakami
Tomokazu Komazaki
Toshio Shinozaki
Yukio Imai
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP342579A priority Critical patent/JPS5596740A/en
Publication of JPS5596740A publication Critical patent/JPS5596740A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/06—Control of transmission; Equalising by the transmitted signal

Abstract

PURPOSE:To realize arbitrarily loss compensation of the line from an exchange to a subscriber terminal and arrival level set to the subscriber by inserting asymmetrical gain equipments into a two-wire section to set the input level and the output level of the subscriber terminal. CONSTITUTION:Impedance matching asymmetrical gain equipments 61 and 62 are inserted between point P1 or P2 and subscriber terminal 31 or 32 for the purpose of compensating line loss 41 or 42 and increasing the signal arrival level to the subscriber. Therefore, the signal of the first subscriber terminal 31 is attenuated by 4dB in the first line loss 41 and receives a gain of 4dB in the first asymmetrical gain equipment 61 and becomes the same level as the signal of terminal 31. Meanwhile, the signal from point P1 receives a gain of 12dB in gain equipment 61 and is attenuated by 4dB in loss 41, and this signal reaches terminal 31 with 0dB in case of -8dB at point P1.
JP342579A 1979-01-18 1979-01-18 Channel circuit Pending JPS5596740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP342579A JPS5596740A (en) 1979-01-18 1979-01-18 Channel circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP342579A JPS5596740A (en) 1979-01-18 1979-01-18 Channel circuit

Publications (1)

Publication Number Publication Date
JPS5596740A true JPS5596740A (en) 1980-07-23

Family

ID=11557013

Family Applications (1)

Application Number Title Priority Date Filing Date
JP342579A Pending JPS5596740A (en) 1979-01-18 1979-01-18 Channel circuit

Country Status (1)

Country Link
JP (1) JPS5596740A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5815528A (en) * 1994-08-26 1998-09-29 Toyota Jidosha Kabushiki Kaisha Interactive communication circuit for selecting a transmitting circuit to generate signals

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54103659A (en) * 1978-02-02 1979-08-15 Oki Electric Ind Co Ltd Asymmetrical gain unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54103659A (en) * 1978-02-02 1979-08-15 Oki Electric Ind Co Ltd Asymmetrical gain unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5815528A (en) * 1994-08-26 1998-09-29 Toyota Jidosha Kabushiki Kaisha Interactive communication circuit for selecting a transmitting circuit to generate signals

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