CH367215A - Circuit arrangement for receiving audio-frequency control signals in telecommunications, in particular telephone systems - Google Patents

Circuit arrangement for receiving audio-frequency control signals in telecommunications, in particular telephone systems

Info

Publication number
CH367215A
CH367215A CH7060259A CH7060259A CH367215A CH 367215 A CH367215 A CH 367215A CH 7060259 A CH7060259 A CH 7060259A CH 7060259 A CH7060259 A CH 7060259A CH 367215 A CH367215 A CH 367215A
Authority
CH
Switzerland
Prior art keywords
telecommunications
control signals
circuit arrangement
frequency control
telephone systems
Prior art date
Application number
CH7060259A
Other languages
German (de)
Inventor
Friedrich Dr Pfleiderer
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 CH367215A publication Critical patent/CH367215A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
    • 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
    • H04Q1/4535—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 with an additional signal transmitted for voice protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Meter Arrangements (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
CH7060259A 1958-03-18 1959-03-10 Circuit arrangement for receiving audio-frequency control signals in telecommunications, in particular telephone systems CH367215A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1958S0057409 DE1049438B (en) 1958-03-18 1958-03-18

Publications (1)

Publication Number Publication Date
CH367215A true CH367215A (en) 1963-02-15

Family

ID=7491799

Family Applications (1)

Application Number Title Priority Date Filing Date
CH7060259A CH367215A (en) 1958-03-18 1959-03-10 Circuit arrangement for receiving audio-frequency control signals in telecommunications, in particular telephone systems

Country Status (6)

Country Link
BE (1) BE573417A (en)
CH (1) CH367215A (en)
DE (1) DE1049438B (en)
FR (1) FR1211266A (en)
GB (1) GB893561A (en)
NL (1) NL237018A (en)

Also Published As

Publication number Publication date
GB893561A (en) 1962-04-11
NL237018A (en) 1964-02-05
BE573417A (en) 1959-03-16
FR1211266A (en) 1960-03-15
DE1049438B (en) 1959-01-29

Similar Documents

Publication Publication Date Title
CH375760A (en) Signal combination device, especially for diversity telecommunication systems
BE597188A (en) Telephone switching system.
AT238777B (en) Circuit arrangement for the selection of connection paths in multi-level switching matrices in telecommunication systems, in particular telephone systems
CH410069A (en) Circuit arrangement for testing lines in telecommunication systems, in particular telephone systems
CH396998A (en) Circuit arrangement for telecommunications, in particular telephone systems, in which lines can be interconnected via switching matrices
CH403873A (en) Circuit arrangement for testing lines in telecommunication systems, in particular telephone systems
CH362127A (en) Device for receiving tone-frequency dialing signals, in particular in a telephone system
CH367215A (en) Circuit arrangement for receiving audio-frequency control signals in telecommunications, in particular telephone systems
BE575672A (en) Telephone system.
CH483112A (en) Switching device with several magnetic control circuits, in particular for connecting telephone lines
DK97830C (en) Telephone set.
DK103894C (en) Automatic telephone system.
CH412998A (en) Centrally controlled switching system, in particular for telephone purposes
CH404735A (en) Circuit arrangement for avoiding double connections in a switching system, in particular for telephone purposes
CH411046A (en) Centrally controlled switching system, in particular for telephone purposes
CH374104A (en) Telecommunication system with relay-free subscriber line circuits
CH397785A (en) Relayless subscriber circuit for telecommunications, in particular telephone systems
CH379585A (en) Circuit arrangement for telecommunications, in particular telephone systems with frequency selection
AU219956B2 (en) Circuit arrangement forthe identification, marking or supervision of lines in telecommunication systems in particular in telephone systems
CH412997A (en) Centrally controlled switching system, in particular for telephone purposes
CH443411A (en) Circuit arrangement for monitoring telecommunication lines, in particular telephone lines
CH372096A (en) Circuit arrangement for power supply devices in telecommunication systems, in particular telephone systems
CA552197A (en) Testing circuit for telecommunications systems
CH415761A (en) Switching device for telecommunication systems, in particular telephone systems
AU3195557A (en) Circuit arrangement forthe identification, marking or supervision of lines in telecommunication systems in particular in telephone systems