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JPS56132848A - Telephone set circuit - Google Patents

Telephone set circuit

Info

Publication number
JPS56132848A
JPS56132848A JP3604080A JP3604080A JPS56132848A JP S56132848 A JPS56132848 A JP S56132848A JP 3604080 A JP3604080 A JP 3604080A JP 3604080 A JP3604080 A JP 3604080A JP S56132848 A JPS56132848 A JP S56132848A
Authority
JP
Japan
Prior art keywords
circuit
transmitter
push
telephone
receiver
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
JP3604080A
Other languages
Japanese (ja)
Inventor
Michio Mito
Kazuyuki Goto
Iwamasa Nishikado
Minoru Yoshida
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.)
NEC Platforms Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Nitsuko Corp
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, Nitsuko Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP3604080A priority Critical patent/JPS56132848A/en
Publication of JPS56132848A publication Critical patent/JPS56132848A/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)

Abstract

PURPOSE:To make it possible to transmit without operating a transmitter-receiver, by providing both the elements for switching a transmitter-receiver circuit and a speaker telephone circuit, and the switching elements for connecting the transmitter- receiver circuit and inserting an attenuation element into the speaker the telephone circuit, when the push button has been operated. CONSTITUTION:This telephone set is provided with elements F1, F2, etc. for switching and connecting a transmitter-receiver circuit K equipped with a push-button dial circuit TG, and a speaker telephone circuit H, to the speech paths L1, L2. In addition, it is provided with switching elements G1, G2, etc. for connecting the transmitter-receiver circuit K to the speech paths L1, L2 and also inserting an attenuating circuit element R into the loud speaker telephone circuit H, by operating the push- button dial TG when the loud speaker telephone circuit H is connected to the speech paths L1, L2. At the time of transmission by a loud speaker telephone, for instance, by use of a circuit shown in the figure, when the key Y, and subsequently, the push-button dial TG is pushed, the common contacts G1, G2 are operated so that connection is made to the other party which is desired.
JP3604080A 1980-03-24 1980-03-24 Telephone set circuit Pending JPS56132848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3604080A JPS56132848A (en) 1980-03-24 1980-03-24 Telephone set circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3604080A JPS56132848A (en) 1980-03-24 1980-03-24 Telephone set circuit

Publications (1)

Publication Number Publication Date
JPS56132848A true JPS56132848A (en) 1981-10-17

Family

ID=12458589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3604080A Pending JPS56132848A (en) 1980-03-24 1980-03-24 Telephone set circuit

Country Status (1)

Country Link
JP (1) JPS56132848A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60232750A (en) * 1984-05-04 1985-11-19 Tamura Electric Works Ltd Suppressing circuit of dial pulse sending tone in functional telephone set
JPS62159953A (en) * 1986-01-09 1987-07-15 Fujitsu Ltd handset connection device
JPS62133463U (en) * 1986-02-14 1987-08-22

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4826811B1 (en) * 1966-12-13 1973-08-16

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4826811B1 (en) * 1966-12-13 1973-08-16

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60232750A (en) * 1984-05-04 1985-11-19 Tamura Electric Works Ltd Suppressing circuit of dial pulse sending tone in functional telephone set
JPS62159953A (en) * 1986-01-09 1987-07-15 Fujitsu Ltd handset connection device
JPH0419734B2 (en) * 1986-01-09 1992-03-31 Fujitsu Ltd
JPS62133463U (en) * 1986-02-14 1987-08-22

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