JPS545320A - Control circuit for communication path - Google Patents

Control circuit for communication path

Info

Publication number
JPS545320A
JPS545320A JP7067077A JP7067077A JPS545320A JP S545320 A JPS545320 A JP S545320A JP 7067077 A JP7067077 A JP 7067077A JP 7067077 A JP7067077 A JP 7067077A JP S545320 A JPS545320 A JP S545320A
Authority
JP
Japan
Prior art keywords
control circuit
communication path
circuit
turned
signal
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
JP7067077A
Other languages
Japanese (ja)
Inventor
Yutaka Okumura
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 JP7067077A priority Critical patent/JPS545320A/en
Publication of JPS545320A publication Critical patent/JPS545320A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To make easy the signal interruption and to reduce the operation time, by providing the comparison circuit and the residual time set circuit further with the control circuit of the echo block circuit quickly stopping the turning off, when a communication signal is incoming while the side tone signal to be turned off is turned off.
JP7067077A 1977-06-14 1977-06-14 Control circuit for communication path Pending JPS545320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7067077A JPS545320A (en) 1977-06-14 1977-06-14 Control circuit for communication path

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7067077A JPS545320A (en) 1977-06-14 1977-06-14 Control circuit for communication path

Publications (1)

Publication Number Publication Date
JPS545320A true JPS545320A (en) 1979-01-16

Family

ID=13438321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7067077A Pending JPS545320A (en) 1977-06-14 1977-06-14 Control circuit for communication path

Country Status (1)

Country Link
JP (1) JPS545320A (en)

Similar Documents

Publication Publication Date Title
ES406315A1 (en) Loudspeaking telephone
JPS52115610A (en) Signal transmission circuit
JPS53145504A (en) Cordless telephone equipment
JPS5348602A (en) Voice control system
JPS53117922A (en) Absence reception voice answer skip system
JPS5348601A (en) Noise control system
JPS5296805A (en) Automatic answering telephone set
JPS52113109A (en) Automatic answering telephone set
JPS5216107A (en) Signal judging circuit
JPS5251804A (en) Remote control system of automatic answering telephone set
JPS5268470A (en) Watch device
JPS5242305A (en) Remote control system for automatic answering telephone set
JPS51121203A (en) Telephone circuits
JPS53138611A (en) Wall-type unit structure for telephone set
JPS547209A (en) Release control system for wireless circuit
JPS5269301A (en) Mode control device
JPS5392607A (en) Voice switch circuit
JPS5382103A (en) Automatic answering telephone set
JPS5391508A (en) Transmission control system for sound signal
JPS5296803A (en) Telephone unit
JPS5368107A (en) Automatic answering telephone set
JPS53122305A (en) Key telephone set
JPS5437513A (en) Double calling signal system of important circuit cuit
JPS5368507A (en) Audio muting circuit
JPS5242303A (en) Key restoring set for telephone