NL261946A - - Google Patents

Info

Publication number
NL261946A
NL261946A NL261946DA NL261946A NL 261946 A NL261946 A NL 261946A NL 261946D A NL261946D A NL 261946DA NL 261946 A NL261946 A NL 261946A
Authority
NL
Netherlands
Application number
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 filed Critical
Publication of NL261946A publication Critical patent/NL261946A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • 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
    • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Selective Calling Equipment (AREA)
NL261946D 1960-07-21 1961-03-03 NL261946A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL254029A NL131295C (xx) 1960-07-21 1960-07-21

Publications (1)

Publication Number Publication Date
NL261946A true NL261946A (xx) 1964-05-25

Family

ID=19752483

Family Applications (3)

Application Number Title Priority Date Filing Date
NL254029D NL254029A (xx) 1960-07-21 1960-07-21
NL254029A NL131295C (xx) 1960-03-04 1960-07-21
NL261946D NL261946A (xx) 1960-07-21 1961-03-03

Family Applications Before (2)

Application Number Title Priority Date Filing Date
NL254029D NL254029A (xx) 1960-07-21 1960-07-21
NL254029A NL131295C (xx) 1960-03-04 1960-07-21

Country Status (10)

Country Link
US (1) US3164680A (xx)
BE (1) BE606073A (xx)
CH (1) CH395196A (xx)
DE (3) DE1122105B (xx)
DK (1) DK105539C (xx)
ES (1) ES268516A1 (xx)
FR (3) FR79296E (xx)
GB (2) GB956356A (xx)
NL (3) NL254029A (xx)
SE (2) SE309053B (xx)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB986310A (en) * 1963-11-27 1965-03-17 Standard Telephones Cables Ltd Telephone tone ringer
GB1051059A (xx) * 1963-11-29
GB1059606A (en) * 1964-08-25 1967-02-22 Sits Soc It Telecom Siemens A ringer
FR2121456B1 (xx) * 1971-01-14 1975-01-17 Ericsson Telefon Ab L M
US3740490A (en) * 1971-01-18 1973-06-19 Bell Telephone Labor Inc Tone ringer
DE2548159C2 (de) * 1975-10-28 1983-05-11 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für den akustischen Ruf in einer Chef- und Sekretärfernsprechanlage

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2319306A (en) * 1941-10-31 1943-05-18 Bell Telephone Labor Inc Signaling system
NL167851C (nl) * 1951-03-03 Hoechst Ag Werkwijze voor het bereiden van farmaceutische preparaten op basis van bis-(4-hydroxyfenyl)-alkaancarbonzuurderivaten.
US2824173A (en) * 1954-11-18 1958-02-18 Bell Telephone Labor Inc Transistor selective ringing, dialing, and party identification circuit
US2824175A (en) * 1954-11-18 1958-02-18 Bell Telephone Labor Inc Selective ringing circuits
GB793543A (en) * 1955-05-06 1958-04-16 Standard Telephones Cables Ltd Improvements in or relating to telephone signalling systems
NL106433C (xx) * 1955-11-14
US2850650A (en) * 1956-03-29 1958-09-02 Bell Telephone Labor Inc Transistor current limiter
US2976369A (en) * 1956-04-11 1961-03-21 Salzer Adolf Field telephone
NL112535C (xx) * 1956-06-07
DE1050832B (xx) * 1956-06-07 1959-02-19
BE563265A (xx) * 1956-06-22
DE1050835B (xx) * 1957-03-14 1959-02-19
US3004105A (en) * 1957-10-21 1961-10-10 Bell Telephone Labor Inc Transistor oscillator identifier for communication systems
US2951910A (en) * 1958-01-14 1960-09-06 North Electric Co Substation signalling device
DE1082300B (de) * 1959-06-04 1960-05-25 Siemens Ag Schaltungsanordnung fuer Teilnehmerstellen in Fernmelde-, insbesondere Fernsprech-anlagen mit Tastaturwahl

Also Published As

Publication number Publication date
NL254029A (xx) 1964-03-25
FR79296E (xx) 1963-02-20
DE1122105B (de) 1962-01-18
FR80430E (fr) 1963-04-26
DK105539C (da) 1966-10-10
DE1141679B (de) 1962-12-27
GB956356A (en) 1964-04-22
US3164680A (en) 1965-01-05
FR80309E (fr) 1963-04-12
ES268516A1 (es) 1961-12-01
GB971802A (en) 1964-10-07
NL131295C (xx) 1971-05-17
SE309053B (xx) 1969-03-10
DE1174374B (de) 1964-07-23
CH395196A (de) 1965-07-15
BE606073A (nl) 1962-01-15
SE319808B (xx) 1970-01-26

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