GB535124A - Improvements in or relating to carrier telephone and signalling systems - Google Patents

Improvements in or relating to carrier telephone and signalling systems

Info

Publication number
GB535124A
GB535124A GB31923/39A GB3192339A GB535124A GB 535124 A GB535124 A GB 535124A GB 31923/39 A GB31923/39 A GB 31923/39A GB 3192339 A GB3192339 A GB 3192339A GB 535124 A GB535124 A GB 535124A
Authority
GB
United Kingdom
Prior art keywords
switch
coa
attenuation
setting
coy
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
GB31923/39A
Other languages
English (en)
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
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
Priority to NL75995D priority Critical patent/NL75995C/xx
Priority to BE465689D priority patent/BE465689A/xx
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB31923/39A priority patent/GB535124A/en
Priority to US366468A priority patent/US2280672A/en
Publication of GB535124A publication Critical patent/GB535124A/en
Priority to FR927296D priority patent/FR927296A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Structure Of Telephone Exchanges (AREA)
GB31923/39A 1939-12-11 1939-12-11 Improvements in or relating to carrier telephone and signalling systems Expired GB535124A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL75995D NL75995C (enrdf_load_stackoverflow) 1939-12-11
BE465689D BE465689A (enrdf_load_stackoverflow) 1939-12-11
GB31923/39A GB535124A (en) 1939-12-11 1939-12-11 Improvements in or relating to carrier telephone and signalling systems
US366468A US2280672A (en) 1939-12-11 1940-11-20 Automatic gain control
FR927296D FR927296A (fr) 1939-12-11 1946-04-23 Dispositif de téléphonie et de signalisation à courants porteurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31923/39A GB535124A (en) 1939-12-11 1939-12-11 Improvements in or relating to carrier telephone and signalling systems

Publications (1)

Publication Number Publication Date
GB535124A true GB535124A (en) 1941-03-28

Family

ID=10330402

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31923/39A Expired GB535124A (en) 1939-12-11 1939-12-11 Improvements in or relating to carrier telephone and signalling systems

Country Status (5)

Country Link
US (1) US2280672A (enrdf_load_stackoverflow)
BE (1) BE465689A (enrdf_load_stackoverflow)
FR (1) FR927296A (enrdf_load_stackoverflow)
GB (1) GB535124A (enrdf_load_stackoverflow)
NL (1) NL75995C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
NL75995C (enrdf_load_stackoverflow)
FR927296A (fr) 1947-10-24
US2280672A (en) 1942-04-21
BE465689A (enrdf_load_stackoverflow)

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