JPS5342608A - Speaker telephone set - Google Patents

Speaker telephone set

Info

Publication number
JPS5342608A
JPS5342608A JP11754476A JP11754476A JPS5342608A JP S5342608 A JPS5342608 A JP S5342608A JP 11754476 A JP11754476 A JP 11754476A JP 11754476 A JP11754476 A JP 11754476A JP S5342608 A JPS5342608 A JP S5342608A
Authority
JP
Japan
Prior art keywords
telephone set
speaker telephone
speaker
cost
reduce
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
JP11754476A
Other languages
Japanese (ja)
Other versions
JPS5745386B2 (en
Inventor
Shinichi Shibata
Taiji Sato
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11754476A priority Critical patent/JPS5342608A/en
Publication of JPS5342608A publication Critical patent/JPS5342608A/en
Publication of JPS5745386B2 publication Critical patent/JPS5745386B2/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)

Abstract

PURPOSE:A delta circuit is used to utilize talking functions sufficiently even under the enviromental condition of intrusive noises, so that a simple circuit constitution can reduce its cost and obtain the high reliability.
JP11754476A 1976-09-30 1976-09-30 Speaker telephone set Granted JPS5342608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11754476A JPS5342608A (en) 1976-09-30 1976-09-30 Speaker telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11754476A JPS5342608A (en) 1976-09-30 1976-09-30 Speaker telephone set

Publications (2)

Publication Number Publication Date
JPS5342608A true JPS5342608A (en) 1978-04-18
JPS5745386B2 JPS5745386B2 (en) 1982-09-27

Family

ID=14714418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11754476A Granted JPS5342608A (en) 1976-09-30 1976-09-30 Speaker telephone set

Country Status (1)

Country Link
JP (1) JPS5342608A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5350609U (en) * 1976-10-01 1978-04-28

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0741425Y2 (en) * 1992-05-07 1995-09-27 ポリマー化成株式会社 Curtain box assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5350609U (en) * 1976-10-01 1978-04-28
JPS5713634Y2 (en) * 1976-10-01 1982-03-19

Also Published As

Publication number Publication date
JPS5745386B2 (en) 1982-09-27

Similar Documents

Publication Publication Date Title
JPS5340257A (en) Tone control circuit
JPS5342608A (en) Speaker telephone set
JPS5323254A (en) Amplifier equipment
JPS5366309A (en) Digital type tone signal detector
JPS51113727A (en) Loud speaker
JPS5249706A (en) Time division channel equipment
JPS5252613A (en) Sound signal regenerating device
JPS51134505A (en) Automatic telephone volume control according to the ambient noises
JPS5234601A (en) Calling circuit
JPS5378103A (en) Telephone recorder
JPS5245804A (en) Telephone memo recording method
JPS5327349A (en) Agc circuit
JPS51129160A (en) Phase sychronize circuit
JPS51117849A (en) Impedance scaler
JPS5366310A (en) Tone signal detecting circuit
JPS5235503A (en) Stop ring circuit for telephone bell ring
JPS51123004A (en) Push-button dialing telephone circuit
JPS5298405A (en) Office line monitoring circuit
JPS5435604A (en) Ringing system of push-button telephone set
JPS51126820A (en) An electronic instrument
JPS5354904A (en) Dial signal transmission system
JPS5264820A (en) Fsk signal reception unit
JPS5298451A (en) Parametric amplifier
JPS5232205A (en) Circuit connecting equipment
JPS51150955A (en) Phase comparison circuit