FR868502A - Device for connecting an end-of-line subscriber telephone set to a four-wire carrier frequency - Google Patents

Device for connecting an end-of-line subscriber telephone set to a four-wire carrier frequency

Info

Publication number
FR868502A
FR868502A FR868502DA FR868502A FR 868502 A FR868502 A FR 868502A FR 868502D A FR868502D A FR 868502DA FR 868502 A FR868502 A FR 868502A
Authority
FR
France
Prior art keywords
carrier frequency
telephone set
subscriber telephone
wire carrier
line subscriber
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 FR868502A publication Critical patent/FR868502A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/08—Arrangements for combining channels
    • H04J1/085—Terminal station; Combined modulator and demodulator circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/78—Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
FR868502D 1939-12-08 1940-12-28 Device for connecting an end-of-line subscriber telephone set to a four-wire carrier frequency Expired FR868502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE219526X 1939-12-08

Publications (1)

Publication Number Publication Date
FR868502A true FR868502A (en) 1942-01-05

Family

ID=5831924

Family Applications (1)

Application Number Title Priority Date Filing Date
FR868502D Expired FR868502A (en) 1939-12-08 1940-12-28 Device for connecting an end-of-line subscriber telephone set to a four-wire carrier frequency

Country Status (5)

Country Link
US (1) US2330612A (en)
BE (1) BE439763A (en)
CH (1) CH219526A (en)
FR (1) FR868502A (en)
NL (1) NL56647C (en)

Also Published As

Publication number Publication date
US2330612A (en) 1943-09-28
CH219526A (en) 1942-02-15
NL56647C (en)
BE439763A (en)

Similar Documents

Publication Publication Date Title
FR1144857A (en) Device for identifying a calling line
FR868502A (en) Device for connecting an end-of-line subscriber telephone set to a four-wire carrier frequency
FR938296A (en) Telephone device
FR1058866A (en) Telephone line selection system
FR848919A (en) Device for modulating the carrier wave of a television transmitter
CH309356A (en) Line circuit of a telecommunications installation.
FR2309090A1 (en) DEVICE FOR EXTENSION OF THE RANGE OF A TELEPHONE TRANSMISSION LINE
FR943739A (en) Device, called line circuit, ensuring the connection of subscribers in telephone networks
FR832795A (en) Receiving amplifier combined with a signaling device for telephone transmissions
FR868497A (en) Device for four-wire connection for trunk circuit
FR987036A (en) Automatic balancing device for connecting a four-wire telephone circuit to a two-wire telephone circuit
FR816060A (en) Recording device for call dial telephone devices
FR858562A (en) Advanced call transmission device in carrier frequency installations
FR763285A (en) Finder device automatically indicating the number of a subscriber calling in telephone networks
CH522987A (en) Multiple use installation of a telephone line
FR858671A (en) Coupling device
FR857961A (en) Clutch device
FR868643A (en) Call rig for wire end assembly for carrier frequency
FR850031A (en) Elastic tension device for clothing belts
FR1043316A (en) Device adaptable to a fishing line to hold a float or ballast
FR896363A (en) Ultra-shortwave duplex intercom device
FR881760A (en) Subscriber telephone sets
FR873861A (en) Device with two transmission channels by means of a high frequency carrier wave
BE420678A (en) Stilt device
FR820292A (en) Device for improving the visibility of signs worn on call dials of automatic telephone devices