FR947900A - Combined telephone and telegraph transmission systems - Google Patents

Combined telephone and telegraph transmission systems

Info

Publication number
FR947900A
FR947900A FR947900DA FR947900A FR 947900 A FR947900 A FR 947900A FR 947900D A FR947900D A FR 947900DA FR 947900 A FR947900 A FR 947900A
Authority
FR
France
Prior art keywords
transmission systems
combined telephone
telegraph transmission
telegraph
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
Other languages
French (fr)
Inventor
Lucien-Angelin-Gusta Braem
Jan Sobola
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR947900A publication Critical patent/FR947900A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/08—Arrangements for interconnection between switching centres for phantom working
    • 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
    • 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
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
FR947900D 1939-06-13 1947-06-13 Combined telephone and telegraph transmission systems Expired FR947900A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB215524X 1939-06-13
GB17287/39A GB530621A (en) 1939-06-13 1939-06-13 Improvements in or relating to superimposed telegraph and telephone systems

Publications (1)

Publication Number Publication Date
FR947900A true FR947900A (en) 1949-07-15

Family

ID=10164814

Family Applications (2)

Application Number Title Priority Date Filing Date
FR947900D Expired FR947900A (en) 1939-06-13 1947-06-13 Combined telephone and telegraph transmission systems
FR57449D Expired FR57449E (en) 1939-06-13 1947-07-12 Combined telephone and telegraph transmission systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR57449D Expired FR57449E (en) 1939-06-13 1947-07-12 Combined telephone and telegraph transmission systems

Country Status (4)

Country Link
BE (2) BE439843A (en)
CH (2) CH215524A (en)
FR (2) FR947900A (en)
GB (2) GB530621A (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
BE439942A (en)
GB530621A (en) 1940-12-17
CH228092A (en) 1943-07-31
CH215524A (en) 1941-06-30
FR57449E (en) 1953-01-02
BE439843A (en)
GB530669A (en) 1940-12-17

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