FR21805E - Transmission system for combined telephone and telegraph services - Google Patents

Transmission system for combined telephone and telegraph services

Info

Publication number
FR21805E
FR21805E FR21805A FR21805DA FR21805E FR 21805 E FR21805 E FR 21805E FR 21805 A FR21805 A FR 21805A FR 21805D A FR21805D A FR 21805DA FR 21805 E FR21805 E FR 21805E
Authority
FR
France
Prior art keywords
transmission system
combined telephone
telegraph
services
telegraph services
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
FR21805A
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 FR21805E publication Critical patent/FR21805E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/141—Control of transmission; Equalising characterised by the equalising network used using multiequalisers, e.g. bump, cosine, Bode
FR21805A 1918-12-11 1919-11-05 Transmission system for combined telephone and telegraph services Expired FR21805E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US266326A US1361486A (en) 1918-12-11 1918-12-11 Composite signaling system

Publications (1)

Publication Number Publication Date
FR21805E true FR21805E (en) 1921-03-30

Family

ID=23014110

Family Applications (2)

Application Number Title Priority Date Filing Date
FR505646A Expired FR505646A (en) 1918-12-11 1919-11-03 Transmission system for combined telephone and telegraph services
FR21805A Expired FR21805E (en) 1918-12-11 1919-11-05 Transmission system for combined telephone and telegraph services

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR505646A Expired FR505646A (en) 1918-12-11 1919-11-03 Transmission system for combined telephone and telegraph services

Country Status (3)

Country Link
US (1) US1361486A (en)
DE (1) DE432495C (en)
FR (2) FR505646A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972640C (en) * 1952-04-10 1959-08-27 Siemens Ag Circuit arrangement for telecommunications systems for the simultaneous transmission of telephone currents and signals over the same line wires

Also Published As

Publication number Publication date
DE432495C (en) 1926-08-09
FR505646A (en) 1920-08-03
US1361486A (en) 1920-12-07

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