GB170286A - - Google Patents

Info

Publication number
GB170286A
GB170286A GB2689221A GB2689221A GB170286A GB 170286 A GB170286 A GB 170286A GB 2689221 A GB2689221 A GB 2689221A GB 2689221 A GB2689221 A GB 2689221A GB 170286 A GB170286 A GB 170286A
Authority
GB
United Kingdom
Prior art keywords
line
frequency
carrier
modulator
relay
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
GB2689221A
Other languages
English (en)
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 filed Critical
Publication of GB170286A publication Critical patent/GB170286A/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)
  • Radio Relay Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Selective Calling Equipment (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Alarm Systems (AREA)
GB2689221A 1920-10-11 1921-10-11 Expired GB170286A (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US416058A US1573936A (en) 1920-10-11 1920-10-11 System of carrier-wave signaling
US434223A US1550657A (en) 1920-10-11 1920-12-31 Ringing circuits for multiplex signaling

Publications (1)

Publication Number Publication Date
GB170286A true GB170286A (de) 1922-11-16

Family

ID=40469807

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2689221A Expired GB170286A (de) 1920-10-11 1921-10-11
GB3103/22A Expired GB196123A (en) 1920-10-11 1922-02-02 Improvements in or relating to telephone systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3103/22A Expired GB196123A (en) 1920-10-11 1922-02-02 Improvements in or relating to telephone systems

Country Status (4)

Country Link
US (2) US1573936A (de)
DE (2) DE394653C (de)
FR (2) FR542056A (de)
GB (2) GB170286A (de)

Also Published As

Publication number Publication date
FR542056A (fr) 1922-08-05
DE442729C (de) 1927-04-08
DE394653C (de) 1924-05-01
US1550657A (en) 1925-08-25
FR26006E (fr) 1923-07-18
GB196123A (en) 1923-04-19
US1573936A (en) 1926-02-23

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