GB465655A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
GB465655A
GB465655A GB29945/36A GB2994536A GB465655A GB 465655 A GB465655 A GB 465655A GB 29945/36 A GB29945/36 A GB 29945/36A GB 2994536 A GB2994536 A GB 2994536A GB 465655 A GB465655 A GB 465655A
Authority
GB
United Kingdom
Prior art keywords
impulse
circuit
over
energizes
relapse
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
GB29945/36A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB465655A publication Critical patent/GB465655A/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
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB29945/36A 1935-11-04 1936-11-03 Improvements in telephone systems Expired GB465655A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE465655X 1935-11-04

Publications (1)

Publication Number Publication Date
GB465655A true GB465655A (en) 1937-05-11

Family

ID=20310269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29945/36A Expired GB465655A (en) 1935-11-04 1936-11-03 Improvements in telephone systems

Country Status (2)

Country Link
FR (1) FR812772A (fr)
GB (1) GB465655A (fr)

Also Published As

Publication number Publication date
FR812772A (fr) 1937-05-18

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