GB995025A - Circuit arrangement for preventing the overhearing of telephone conversations - Google Patents

Circuit arrangement for preventing the overhearing of telephone conversations

Info

Publication number
GB995025A
GB995025A GB41680/62A GB4168062A GB995025A GB 995025 A GB995025 A GB 995025A GB 41680/62 A GB41680/62 A GB 41680/62A GB 4168062 A GB4168062 A GB 4168062A GB 995025 A GB995025 A GB 995025A
Authority
GB
United Kingdom
Prior art keywords
capacitor
contact
line
overhearing
nov
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
GB41680/62A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB995025A publication Critical patent/GB995025A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/68—Circuit arrangements for preventing eavesdropping

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB41680/62A 1961-11-22 1962-11-05 Circuit arrangement for preventing the overhearing of telephone conversations Expired GB995025A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEK0045268 1961-11-22
DEK45632A DE1259392B (de) 1961-11-22 1962-01-11 Schaltungsanordnung zur Verhinderung des Abhoerens von Gespraechen bei Fernsprechapparaten

Publications (1)

Publication Number Publication Date
GB995025A true GB995025A (en) 1965-06-10

Family

ID=25983500

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41680/62A Expired GB995025A (en) 1961-11-22 1962-11-05 Circuit arrangement for preventing the overhearing of telephone conversations

Country Status (6)

Country Link
BE (1) BE624666A (en:Method)
CH (1) CH397783A (en:Method)
DE (1) DE1259392B (en:Method)
FR (1) FR1339246A (en:Method)
GB (1) GB995025A (en:Method)
NL (1) NL285759A (en:Method)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308986C2 (de) * 1983-03-14 1986-02-27 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung für eine digitale Fernsprechstation
DE3308984C2 (de) * 1983-03-14 1986-02-27 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung für eine digitale Fernsprechstation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066624B (de) * 1959-10-08 Telefonbau und Normalzeit G.m. b.H., Frankfurt/M Schalungsanordnung zum Verhindern des Abhörens von Gesprächen

Also Published As

Publication number Publication date
FR1339246A (fr) 1963-10-04
NL285759A (en:Method)
CH397783A (de) 1965-08-31
BE624666A (en:Method)
DE1259392B (de) 1968-01-25

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