JPS52116004A - Voice call system - Google Patents

Voice call system

Info

Publication number
JPS52116004A
JPS52116004A JP3247576A JP3247576A JPS52116004A JP S52116004 A JPS52116004 A JP S52116004A JP 3247576 A JP3247576 A JP 3247576A JP 3247576 A JP3247576 A JP 3247576A JP S52116004 A JPS52116004 A JP S52116004A
Authority
JP
Japan
Prior art keywords
voice call
call system
economy
speaker
utilizing
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
JP3247576A
Other languages
Japanese (ja)
Inventor
Masaki Ogawa
Yuichiro Takagawa
Minoru Sasai
Yoshio Nagasaki
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
Kanda Tsushin Kogyo Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Kanda Tsushin Kogyo 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, Kanda Tsushin Kogyo Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP3247576A priority Critical patent/JPS52116004A/en
Publication of JPS52116004A publication Critical patent/JPS52116004A/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
    • H04M1/71—Substation extension arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:By utilizing the extension mutual speech channel, economy is achieved in the loud calling by the speaker on the telephone side.
JP3247576A 1976-03-26 1976-03-26 Voice call system Pending JPS52116004A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3247576A JPS52116004A (en) 1976-03-26 1976-03-26 Voice call system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3247576A JPS52116004A (en) 1976-03-26 1976-03-26 Voice call system

Publications (1)

Publication Number Publication Date
JPS52116004A true JPS52116004A (en) 1977-09-29

Family

ID=12359993

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3247576A Pending JPS52116004A (en) 1976-03-26 1976-03-26 Voice call system

Country Status (1)

Country Link
JP (1) JPS52116004A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5330802A (en) * 1976-09-03 1978-03-23 Meisei Electric Co Ltd Key telephone system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS419922Y1 (en) * 1965-10-29 1966-05-13
JPS5279706A (en) * 1975-12-26 1977-07-05 Iwatsu Electric Co Ltd Subscriber line calling system in key telephone unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS419922Y1 (en) * 1965-10-29 1966-05-13
JPS5279706A (en) * 1975-12-26 1977-07-05 Iwatsu Electric Co Ltd Subscriber line calling system in key telephone unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5330802A (en) * 1976-09-03 1978-03-23 Meisei Electric Co Ltd Key telephone system
JPS5438003B2 (en) * 1976-09-03 1979-11-19

Similar Documents

Publication Publication Date Title
NL7812136A (en) TELEPHONE STATION WITH SPEAKER.
NL187376C (en) TELEPHONE VOICE NETWORK.
IT1072049B (en) TWO-CHANNEL CONVERSATION HANDS-FREE SPEAKER DOOR PHONE SYSTEM
IT7821471A0 (en) CIRCUIT ARRANGEMENT FOR A TELEPHONE SET EQUIPPED WITH A SPEAKER AND CONTROLLED BY VOICE.
NL187662C (en) SWITCHING FOR PAIRING A MICROPHONE AND TELEPHONE WITH A SUBSCRIBER LINE.
AU508617B2 (en) Voice switched telephone loudspeakers
JPS52116004A (en) Voice call system
JPS51128205A (en) Telephone device
JPS5313806A (en) Telephone extension system
JPS5213706A (en) Key telephone system
JPS5330803A (en) Voice communication system
JPS547803A (en) Cordless telephone set
JPS5215208A (en) Voice switch for telephone set
JPS51128208A (en) Idling power saving
AU500321B2 (en) Telephone microphone
JPS524102A (en) Telephone sound volume controller
JPS53132911A (en) Telephone set
JPS52142909A (en) Hand free telephone
JPS5394805A (en) Communication terminal equipment
JPS51144504A (en) Telephone set
JPS51141507A (en) Speaker talking system
JPS5329605A (en) Hand-free telephone set
JPS5329606A (en) Simple type hand-free communicating unit
JPS52142908A (en) Simple hand free telephone call equipment
JPS549506A (en) Receiving amplification telephone exchange system