JPS5225506A - Loud-speaker unit - Google Patents

Loud-speaker unit

Info

Publication number
JPS5225506A
JPS5225506A JP10157475A JP10157475A JPS5225506A JP S5225506 A JPS5225506 A JP S5225506A JP 10157475 A JP10157475 A JP 10157475A JP 10157475 A JP10157475 A JP 10157475A JP S5225506 A JPS5225506 A JP S5225506A
Authority
JP
Japan
Prior art keywords
loud
speaker unit
wire line
detect speech
speech talk
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
JP10157475A
Other languages
Japanese (ja)
Other versions
JPS5422723B2 (en
Inventor
Shotaro Aoto
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.)
TANAKA DENKI KK
Original Assignee
TANAKA DENKI KK
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 TANAKA DENKI KK filed Critical TANAKA DENKI KK
Priority to JP10157475A priority Critical patent/JPS5225506A/en
Publication of JPS5225506A publication Critical patent/JPS5225506A/en
Publication of JPS5422723B2 publication Critical patent/JPS5422723B2/ja
Granted 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

Abstract

PURPOSE:To detect speech talk between distant subscribers by two-wire line.
JP10157475A 1975-08-21 1975-08-21 Loud-speaker unit Granted JPS5225506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10157475A JPS5225506A (en) 1975-08-21 1975-08-21 Loud-speaker unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10157475A JPS5225506A (en) 1975-08-21 1975-08-21 Loud-speaker unit

Publications (2)

Publication Number Publication Date
JPS5225506A true JPS5225506A (en) 1977-02-25
JPS5422723B2 JPS5422723B2 (en) 1979-08-08

Family

ID=14304157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10157475A Granted JPS5225506A (en) 1975-08-21 1975-08-21 Loud-speaker unit

Country Status (1)

Country Link
JP (1) JPS5225506A (en)

Also Published As

Publication number Publication date
JPS5422723B2 (en) 1979-08-08

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