GB608117A - Voice frequency ringer - Google Patents

Voice frequency ringer

Info

Publication number
GB608117A
GB608117A GB4826/46A GB482646A GB608117A GB 608117 A GB608117 A GB 608117A GB 4826/46 A GB4826/46 A GB 4826/46A GB 482646 A GB482646 A GB 482646A GB 608117 A GB608117 A GB 608117A
Authority
GB
United Kingdom
Prior art keywords
frequency
output
current
signalling
valve
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
GB4826/46A
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.)
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
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB608117A publication Critical patent/GB608117A/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
    • 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)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB4826/46A 1945-02-21 1946-02-15 Voice frequency ringer Expired GB608117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US579126A US2414440A (en) 1945-02-21 1945-02-21 Voice frequency ringer

Publications (1)

Publication Number Publication Date
GB608117A true GB608117A (en) 1948-09-09

Family

ID=24315671

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4826/46A Expired GB608117A (en) 1945-02-21 1946-02-15 Voice frequency ringer

Country Status (5)

Country Link
US (1) US2414440A (forum.php)
BE (1) BE467777A (forum.php)
ES (1) ES172956A1 (forum.php)
FR (1) FR922528A (forum.php)
GB (1) GB608117A (forum.php)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR960967A (forum.php) * 1945-02-06 1950-04-28
US2751436A (en) * 1952-03-27 1956-06-19 Automatic Elect Lab Carrier current telephone systems
DE1004860B (de) * 1952-12-18 1957-03-21 Roland Laraque Brennkraftmaschine mit gegenlaeufigen Kolben
FR1098648A (fr) * 1954-01-22 1955-08-16 Lignes Telegraph Telephon Dispositif de réception de signaux télégraphiques

Also Published As

Publication number Publication date
FR922528A (fr) 1947-06-11
US2414440A (en) 1947-01-21
BE467777A (forum.php)
ES172956A1 (es) 1946-05-01

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