JPS5331910A - Conference telephone unit - Google Patents

Conference telephone unit

Info

Publication number
JPS5331910A
JPS5331910A JP10694076A JP10694076A JPS5331910A JP S5331910 A JPS5331910 A JP S5331910A JP 10694076 A JP10694076 A JP 10694076A JP 10694076 A JP10694076 A JP 10694076A JP S5331910 A JPS5331910 A JP S5331910A
Authority
JP
Japan
Prior art keywords
telephone unit
conference telephone
side tone
circuits
sabscriber
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
JP10694076A
Other languages
Japanese (ja)
Other versions
JPS576744B2 (en
Inventor
Fuminobu Butani
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP10694076A priority Critical patent/JPS5331910A/en
Publication of JPS5331910A publication Critical patent/JPS5331910A/en
Publication of JPS576744B2 publication Critical patent/JPS576744B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To decrease the level fluctuation side tone through a parallel connection of many subscriber circuits by providing a bypass between the transmitter and receiver circuits of each sabscriber and negating the side tone which is fed back to the local receiver circuit.
JP10694076A 1976-09-06 1976-09-06 Conference telephone unit Granted JPS5331910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10694076A JPS5331910A (en) 1976-09-06 1976-09-06 Conference telephone unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10694076A JPS5331910A (en) 1976-09-06 1976-09-06 Conference telephone unit

Publications (2)

Publication Number Publication Date
JPS5331910A true JPS5331910A (en) 1978-03-25
JPS576744B2 JPS576744B2 (en) 1982-02-06

Family

ID=14446372

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10694076A Granted JPS5331910A (en) 1976-09-06 1976-09-06 Conference telephone unit

Country Status (1)

Country Link
JP (1) JPS5331910A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57119549A (en) * 1980-12-01 1982-07-26 Philips Nv Conference telephone system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57119549A (en) * 1980-12-01 1982-07-26 Philips Nv Conference telephone system
JPH0351149B2 (en) * 1980-12-01 1991-08-05 Fuiritsupusu Furuuiranpenfuaburiken Nv

Also Published As

Publication number Publication date
JPS576744B2 (en) 1982-02-06

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