CH272952A - Circuit arrangement for signaling via telephone lines. - Google Patents

Circuit arrangement for signaling via telephone lines.

Info

Publication number
CH272952A
CH272952A CH272952DA CH272952A CH 272952 A CH272952 A CH 272952A CH 272952D A CH272952D A CH 272952DA CH 272952 A CH272952 A CH 272952A
Authority
CH
Switzerland
Prior art keywords
circuit arrangement
telephone lines
signaling via
via telephone
signaling
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Standard Telephon Und Radio
Original Assignee
Standard Telephon & Radio Ag
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 Telephon & Radio Ag filed Critical Standard Telephon & Radio Ag
Publication of CH272952A publication Critical patent/CH272952A/en

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)
  • Interface Circuits In Exchanges (AREA)
CH272952D 1948-04-13 1948-04-13 Circuit arrangement for signaling via telephone lines. CH272952A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH885565X 1948-04-13

Publications (1)

Publication Number Publication Date
CH272952A true CH272952A (en) 1951-01-15

Family

ID=4545247

Family Applications (1)

Application Number Title Priority Date Filing Date
CH272952D CH272952A (en) 1948-04-13 1948-04-13 Circuit arrangement for signaling via telephone lines.

Country Status (2)

Country Link
CH (1) CH272952A (en)
DE (1) DE885565C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306984A (en) * 1963-12-16 1967-02-28 Bell Telephone Labor Inc Elimination of talk-off in in-band signaling systems

Also Published As

Publication number Publication date
DE885565C (en) 1953-08-06

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