JPS56117462A - Loudspeaking telephone device - Google Patents

Loudspeaking telephone device

Info

Publication number
JPS56117462A
JPS56117462A JP2184580A JP2184580A JPS56117462A JP S56117462 A JPS56117462 A JP S56117462A JP 2184580 A JP2184580 A JP 2184580A JP 2184580 A JP2184580 A JP 2184580A JP S56117462 A JPS56117462 A JP S56117462A
Authority
JP
Japan
Prior art keywords
circuit
receiving
reception
telephone device
transmission
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
JP2184580A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6128259B2 (zh
Inventor
Masakazu Nishino
Akio Sasaki
Hiroo Mafune
Seiji Nakama
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.)
Nippon Telegraph and Telephone Corp
Panasonic Mobile Communications Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Matsushita Communication Industrial 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 Nippon Telegraph and Telephone Corp, Matsushita Communication Industrial Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2184580A priority Critical patent/JPS56117462A/ja
Publication of JPS56117462A publication Critical patent/JPS56117462A/ja
Publication of JPS6128259B2 publication Critical patent/JPS6128259B2/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
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
JP2184580A 1980-02-22 1980-02-22 Loudspeaking telephone device Granted JPS56117462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2184580A JPS56117462A (en) 1980-02-22 1980-02-22 Loudspeaking telephone device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2184580A JPS56117462A (en) 1980-02-22 1980-02-22 Loudspeaking telephone device

Publications (2)

Publication Number Publication Date
JPS56117462A true JPS56117462A (en) 1981-09-14
JPS6128259B2 JPS6128259B2 (zh) 1986-06-30

Family

ID=12066422

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2184580A Granted JPS56117462A (en) 1980-02-22 1980-02-22 Loudspeaking telephone device

Country Status (1)

Country Link
JP (1) JPS56117462A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5943637A (ja) * 1982-07-30 1984-03-10 コミユニケイシヨンズ・サテライト・コ−ポレイシヨン エコ−キヤンセラ
US4484034A (en) * 1980-04-25 1984-11-20 Telecommunications Radioelectrique Et Telephoniques Anti-larsen-effect arrangement in a telephone station equipped with a loudspeaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484034A (en) * 1980-04-25 1984-11-20 Telecommunications Radioelectrique Et Telephoniques Anti-larsen-effect arrangement in a telephone station equipped with a loudspeaker
JPS5943637A (ja) * 1982-07-30 1984-03-10 コミユニケイシヨンズ・サテライト・コ−ポレイシヨン エコ−キヤンセラ

Also Published As

Publication number Publication date
JPS6128259B2 (zh) 1986-06-30

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