FR858563A - Improvement of call transmission devices in carrier frequency installations - Google Patents

Improvement of call transmission devices in carrier frequency installations

Info

Publication number
FR858563A
FR858563A FR858563DA FR858563A FR 858563 A FR858563 A FR 858563A FR 858563D A FR858563D A FR 858563DA FR 858563 A FR858563 A FR 858563A
Authority
FR
France
Prior art keywords
improvement
carrier frequency
transmission devices
call transmission
frequency installations
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 FR858563A publication Critical patent/FR858563A/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
    • H04J1/14—Arrangements providing for calling or supervisory signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
FR858563D 1938-08-04 1939-08-01 Improvement of call transmission devices in carrier frequency installations Expired FR858563A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE211740X 1938-08-04

Publications (1)

Publication Number Publication Date
FR858563A true FR858563A (en) 1940-11-28

Family

ID=5804333

Family Applications (1)

Application Number Title Priority Date Filing Date
FR858563D Expired FR858563A (en) 1938-08-04 1939-08-01 Improvement of call transmission devices in carrier frequency installations

Country Status (4)

Country Link
US (1) US2306121A (en)
BE (1) BE435784A (en)
CH (1) CH211740A (en)
FR (1) FR858563A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR959321A (en) * 1941-01-31 1950-03-29
FR960967A (en) * 1945-02-06 1950-04-28
US2600248A (en) * 1949-04-28 1952-06-10 Rca Corp Transmitter keyer
US2766324A (en) * 1951-12-18 1956-10-09 Motorola Inc Switching system
BE523372A (en) * 1952-10-08
US2910543A (en) * 1955-06-15 1959-10-27 Gen Telephone Lab Inc Paystation party line lockout systems

Also Published As

Publication number Publication date
BE435784A (en)
CH211740A (en) 1940-10-15
US2306121A (en) 1942-12-22

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