FR521218A - Improvements in telephone circuits using electrical repeaters - Google Patents

Improvements in telephone circuits using electrical repeaters

Info

Publication number
FR521218A
FR521218A FR521218A FR521218DA FR521218A FR 521218 A FR521218 A FR 521218A FR 521218 A FR521218 A FR 521218A FR 521218D A FR521218D A FR 521218DA FR 521218 A FR521218 A FR 521218A
Authority
FR
France
Prior art keywords
telephone circuits
electrical repeaters
repeaters
electrical
telephone
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
FR521218A
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR521218A publication Critical patent/FR521218A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits
FR521218A 1919-07-31 1920-07-27 Improvements in telephone circuits using electrical repeaters Expired FR521218A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US314547A US1603319A (en) 1919-07-31 1919-07-31 Telephone repeater

Publications (1)

Publication Number Publication Date
FR521218A true FR521218A (en) 1921-07-08

Family

ID=23220384

Family Applications (1)

Application Number Title Priority Date Filing Date
FR521218A Expired FR521218A (en) 1919-07-31 1920-07-27 Improvements in telephone circuits using electrical repeaters

Country Status (5)

Country Link
US (1) US1603319A (en)
DE (1) DE454207C (en)
FR (1) FR521218A (en)
GB (1) GB149331A (en)
NL (1) NL10539C (en)

Also Published As

Publication number Publication date
NL10539C (en)
DE454207C (en) 1928-01-03
GB149331A (en) 1921-09-22
US1603319A (en) 1926-10-19

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