GB702253A - Improvements in or relating to voice frequency signal receivers - Google Patents

Improvements in or relating to voice frequency signal receivers

Info

Publication number
GB702253A
GB702253A GB1624852A GB1624852A GB702253A GB 702253 A GB702253 A GB 702253A GB 1624852 A GB1624852 A GB 1624852A GB 1624852 A GB1624852 A GB 1624852A GB 702253 A GB702253 A GB 702253A
Authority
GB
United Kingdom
Prior art keywords
guard
circuit
signal
relating
frequency signal
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
GB1624852A
Other languages
English (en)
Inventor
Thomas Frederick St Hargreaves
Hector Thomas Prior
William Francis S Chittleburgh
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 BE523339D priority Critical patent/BE523339A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1624852A priority patent/GB702253A/en
Publication of GB702253A publication Critical patent/GB702253A/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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
GB1624852A 1952-06-27 1952-06-27 Improvements in or relating to voice frequency signal receivers Expired GB702253A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE523339D BE523339A (he) 1952-06-27
GB1624852A GB702253A (en) 1952-06-27 1952-06-27 Improvements in or relating to voice frequency signal receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1624852A GB702253A (en) 1952-06-27 1952-06-27 Improvements in or relating to voice frequency signal receivers

Publications (1)

Publication Number Publication Date
GB702253A true GB702253A (en) 1954-01-13

Family

ID=10073874

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1624852A Expired GB702253A (en) 1952-06-27 1952-06-27 Improvements in or relating to voice frequency signal receivers

Country Status (2)

Country Link
BE (1) BE523339A (he)
GB (1) GB702253A (he)

Also Published As

Publication number Publication date
BE523339A (he)

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