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FR1227286A - Duplex amplifier and its adaptation to a public telephone network line - Google Patents

Duplex amplifier and its adaptation to a public telephone network line

Info

Publication number
FR1227286A
FR1227286A FR785584A FR785584A FR1227286A FR 1227286 A FR1227286 A FR 1227286A FR 785584 A FR785584 A FR 785584A FR 785584 A FR785584 A FR 785584A FR 1227286 A FR1227286 A FR 1227286A
Authority
FR
France
Prior art keywords
adaptation
telephone network
public telephone
network line
duplex amplifier
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.)
Expired
Application number
FR785584A
Other languages
French (fr)
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.)
TELEPHONIE AMPLIFIEE SOC NOUV
Original Assignee
TELEPHONIE AMPLIFIEE SOC NOUV
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
Priority to NL247967D priority Critical patent/NL247967A/xx
Application filed by TELEPHONIE AMPLIFIEE SOC NOUV filed Critical TELEPHONIE AMPLIFIEE SOC NOUV
Priority to FR785584A priority patent/FR1227286A/en
Priority to BE587075A priority patent/BE587075A/en
Priority to DES66877A priority patent/DE1132598B/en
Application granted granted Critical
Publication of FR1227286A publication Critical patent/FR1227286A/en
Expired 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
FR785584A 1959-02-02 1959-02-02 Duplex amplifier and its adaptation to a public telephone network line Expired FR1227286A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL247967D NL247967A (en) 1959-02-02
FR785584A FR1227286A (en) 1959-02-02 1959-02-02 Duplex amplifier and its adaptation to a public telephone network line
BE587075A BE587075A (en) 1959-02-02 1960-01-28 Duplex amplifier and its adaptation to the public telephone network line
DES66877A DE1132598B (en) 1959-02-02 1960-02-01 Circuit arrangement for feedback locks in loudspeaker systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR785584A FR1227286A (en) 1959-02-02 1959-02-02 Duplex amplifier and its adaptation to a public telephone network line

Publications (1)

Publication Number Publication Date
FR1227286A true FR1227286A (en) 1960-08-19

Family

ID=8710760

Family Applications (1)

Application Number Title Priority Date Filing Date
FR785584A Expired FR1227286A (en) 1959-02-02 1959-02-02 Duplex amplifier and its adaptation to a public telephone network line

Country Status (4)

Country Link
BE (1) BE587075A (en)
DE (1) DE1132598B (en)
FR (1) FR1227286A (en)
NL (1) NL247967A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882420C (en) * 1938-04-12 1953-07-09 Siemens Ag Circuit arrangement for feedback locks in loudspeaker systems
BE560458A (en) * 1954-02-08

Also Published As

Publication number Publication date
DE1132598B (en) 1962-07-05
BE587075A (en) 1960-05-16
NL247967A (en)

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