FR858471A - Device for mounting teletransmission installations in which signals are given by alternating currents of a determined frequency - Google Patents

Device for mounting teletransmission installations in which signals are given by alternating currents of a determined frequency

Info

Publication number
FR858471A
FR858471A FR858471DA FR858471A FR 858471 A FR858471 A FR 858471A FR 858471D A FR858471D A FR 858471DA FR 858471 A FR858471 A FR 858471A
Authority
FR
France
Prior art keywords
teletransmission
installations
signals
mounting
given
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)
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
C Lorenz AG
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 Standard Elektrik Lorenz AG, C Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of FR858471A publication Critical patent/FR858471A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
FR858471D 1938-07-30 1939-07-28 Device for mounting teletransmission installations in which signals are given by alternating currents of a determined frequency Expired FR858471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL95305A DE761755C (en) 1938-07-30 1938-07-30 Circuit arrangement for telecommunications systems, in which signals are given by alternating currents of a certain frequency

Publications (1)

Publication Number Publication Date
FR858471A true FR858471A (en) 1940-11-26

Family

ID=27797494

Family Applications (1)

Application Number Title Priority Date Filing Date
FR858471D Expired FR858471A (en) 1938-07-30 1939-07-28 Device for mounting teletransmission installations in which signals are given by alternating currents of a determined frequency

Country Status (6)

Country Link
US (1) US2238263A (en)
BE (1) BE435700A (en)
CH (1) CH213513A (en)
DE (1) DE761755C (en)
FR (1) FR858471A (en)
NL (2) NL56981C (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE428639C (en) * 1926-05-20 Siemens & Halske Akt Ges Electric call device for telecommunication lines
DE377922C (en) * 1921-02-22 1923-06-29 Western Electric Co Ltd Circuit arrangement for signal transmission

Also Published As

Publication number Publication date
CH213513A (en) 1941-02-15
US2238263A (en) 1941-04-15
BE435700A (en)
DE761755C (en) 1953-11-02
NL56981C (en)
NL55006C (en)

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