JPS5689159A - Speaker switching telephone system - Google Patents

Speaker switching telephone system

Info

Publication number
JPS5689159A
JPS5689159A JP16551479A JP16551479A JPS5689159A JP S5689159 A JPS5689159 A JP S5689159A JP 16551479 A JP16551479 A JP 16551479A JP 16551479 A JP16551479 A JP 16551479A JP S5689159 A JPS5689159 A JP S5689159A
Authority
JP
Japan
Prior art keywords
speaker
voice
change
switch
conversation
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
JP16551479A
Other languages
Japanese (ja)
Inventor
Akira Ashida
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP16551479A priority Critical patent/JPS5689159A/en
Publication of JPS5689159A publication Critical patent/JPS5689159A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To make it possible to switch the handset and the speaker in the course of conversation, by making it possible to hear the voice of the other party from the speaker by the turn-on operation of the change-over switch and by disconnecting the line for on-hook by the operation of the end key. CONSTITUTION:In case of turning-on of change-over switch 4, hook switch 3 is turned off; and when end key 12 is turned off, the voice line is switched by control signal 6, and circuit disconnection deciding circuit 8 does not output line disconnection signal 9, and therefore, the circuit is held as it is, and the voice of the other party can be heard from speaker 1. By turning on change-over switch 4 in the course of conversation, handset 2 or speaker 1 can be switched any times to continue conversation until end key 12 is depressed.
JP16551479A 1979-12-21 1979-12-21 Speaker switching telephone system Pending JPS5689159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16551479A JPS5689159A (en) 1979-12-21 1979-12-21 Speaker switching telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16551479A JPS5689159A (en) 1979-12-21 1979-12-21 Speaker switching telephone system

Publications (1)

Publication Number Publication Date
JPS5689159A true JPS5689159A (en) 1981-07-20

Family

ID=15813835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16551479A Pending JPS5689159A (en) 1979-12-21 1979-12-21 Speaker switching telephone system

Country Status (1)

Country Link
JP (1) JPS5689159A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01132167U (en) * 1988-03-01 1989-09-07
JP2006054181A (en) * 2004-08-10 2006-02-23 Ge Medical Systems Global Technology Co Llc Cantilever type and straddle type rotating anode x-ray tube equipped with vacuum transition chamber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01132167U (en) * 1988-03-01 1989-09-07
JPH0514593Y2 (en) * 1988-03-01 1993-04-19
JP2006054181A (en) * 2004-08-10 2006-02-23 Ge Medical Systems Global Technology Co Llc Cantilever type and straddle type rotating anode x-ray tube equipped with vacuum transition chamber

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