JPH0134418B2 - - Google Patents

Info

Publication number
JPH0134418B2
JPH0134418B2 JP57026463A JP2646382A JPH0134418B2 JP H0134418 B2 JPH0134418 B2 JP H0134418B2 JP 57026463 A JP57026463 A JP 57026463A JP 2646382 A JP2646382 A JP 2646382A JP H0134418 B2 JPH0134418 B2 JP H0134418B2
Authority
JP
Japan
Prior art keywords
loudspeaker
switch
switching element
station
amplifier
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.)
Expired
Application number
JP57026463A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58143661A (ja
Inventor
Mitsutoshi Tanaka
Kazumi Kitagawa
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.)
AIPPON KK
Original Assignee
AIPPON KK
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 AIPPON KK filed Critical AIPPON KK
Priority to JP2646382A priority Critical patent/JPS58143661A/ja
Publication of JPS58143661A publication Critical patent/JPS58143661A/ja
Publication of JPH0134418B2 publication Critical patent/JPH0134418B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
JP2646382A 1982-02-19 1982-02-19 モニタ機能付インタ−ホン装置 Granted JPS58143661A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2646382A JPS58143661A (ja) 1982-02-19 1982-02-19 モニタ機能付インタ−ホン装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2646382A JPS58143661A (ja) 1982-02-19 1982-02-19 モニタ機能付インタ−ホン装置

Publications (2)

Publication Number Publication Date
JPS58143661A JPS58143661A (ja) 1983-08-26
JPH0134418B2 true JPH0134418B2 (enrdf_load_stackoverflow) 1989-07-19

Family

ID=12194201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2646382A Granted JPS58143661A (ja) 1982-02-19 1982-02-19 モニタ機能付インタ−ホン装置

Country Status (1)

Country Link
JP (1) JPS58143661A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS58143661A (ja) 1983-08-26

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