BE597354A - Further development of complex pulse current selection telephone systems - Google Patents

Further development of complex pulse current selection telephone systems

Info

Publication number
BE597354A
BE597354A BE597354A BE597354A BE597354A BE 597354 A BE597354 A BE 597354A BE 597354 A BE597354 A BE 597354A BE 597354 A BE597354 A BE 597354A BE 597354 A BE597354 A BE 597354A
Authority
BE
Belgium
Prior art keywords
further development
pulse current
telephone systems
current selection
complex pulse
Prior art date
Application number
BE597354A
Other languages
French (fr)
Original Assignee
Siemens 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 Siemens Ag filed Critical Siemens Ag
Publication of BE597354A publication Critical patent/BE597354A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Control Of Amplification And Gain Control (AREA)
BE597354A 1959-11-27 1960-11-22 Further development of complex pulse current selection telephone systems BE597354A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES66021A DE1103400B (en) 1959-11-27 1959-11-27 Method and circuit arrangement for avoiding interference with the audio frequency signals as a result of the influence caused by electrical forks in the signal circuits of telephone systems with multi-frequency code dialing

Publications (1)

Publication Number Publication Date
BE597354A true BE597354A (en) 1961-03-15

Family

ID=7498486

Family Applications (1)

Application Number Title Priority Date Filing Date
BE597354A BE597354A (en) 1959-11-27 1960-11-22 Further development of complex pulse current selection telephone systems

Country Status (5)

Country Link
BE (1) BE597354A (en)
CH (1) CH387108A (en)
DE (1) DE1103400B (en)
GB (1) GB958385A (en)
NL (1) NL258188A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE936879C (en) * 1952-07-15 1955-12-22 Heinrich Dipl-Ing Gerwig Self-voting system
DE1007382B (en) * 1954-06-22 1957-05-02 Siemens Ag Electrical signal receiver for receiving voltages of a signal composed of at least two frequencies
DE1015487B (en) * 1955-06-03 1957-09-12 Standard Elektrik Ag Circuit arrangement for equalizing different signal levels in a receiving device for signals according to the frequency code system

Also Published As

Publication number Publication date
DE1103400B (en) 1961-03-30
NL258188A (en)
CH387108A (en) 1965-01-31
GB958385A (en) 1964-05-21

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