JPS5269203A - Master-sub system simultaneous call interphone - Google Patents

Master-sub system simultaneous call interphone

Info

Publication number
JPS5269203A
JPS5269203A JP14572575A JP14572575A JPS5269203A JP S5269203 A JPS5269203 A JP S5269203A JP 14572575 A JP14572575 A JP 14572575A JP 14572575 A JP14572575 A JP 14572575A JP S5269203 A JPS5269203 A JP S5269203A
Authority
JP
Japan
Prior art keywords
master
sub system
simultaneous call
system simultaneous
interphone
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
JP14572575A
Other languages
Japanese (ja)
Inventor
Hiroshi Kawabe
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14572575A priority Critical patent/JPS5269203A/en
Publication of JPS5269203A publication Critical patent/JPS5269203A/en
Pending 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)

Abstract

PURPOSE:To simplify the circuit construction of master and subordinate interphones and facilitate offering in both directions by providing one voice switch circuit and providing the power source circuit only in the master interphone.
JP14572575A 1975-12-05 1975-12-05 Master-sub system simultaneous call interphone Pending JPS5269203A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14572575A JPS5269203A (en) 1975-12-05 1975-12-05 Master-sub system simultaneous call interphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14572575A JPS5269203A (en) 1975-12-05 1975-12-05 Master-sub system simultaneous call interphone

Publications (1)

Publication Number Publication Date
JPS5269203A true JPS5269203A (en) 1977-06-08

Family

ID=15391678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14572575A Pending JPS5269203A (en) 1975-12-05 1975-12-05 Master-sub system simultaneous call interphone

Country Status (1)

Country Link
JP (1) JPS5269203A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50145729A (en) * 1974-04-09 1975-11-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50145729A (en) * 1974-04-09 1975-11-22

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