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 (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL254029A NL131295C (en:Method) 1960-07-21 1960-07-21

Publications (1)

Publication Number Publication Date
NL261946A true NL261946A (en:Method) 1964-05-25

Family

ID=19752483

Family Applications (3)

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

Family Applications Before (2)

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

Country Status (10)

Country Link
US (1) US3164680A (en:Method)
BE (1) BE606073A (en:Method)
CH (1) CH395196A (en:Method)
DE (3) DE1122105B (en:Method)
DK (1) DK105539C (en:Method)
ES (1) ES268516A1 (en:Method)
FR (3) FR79296E (en:Method)
GB (2) GB956356A (en:Method)
NL (3) NL131295C (en:Method)
SE (2) SE309053B (en:Method)

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 (en:Method) * 1963-11-29
GB1059606A (en) * 1964-08-25 1967-02-22 Sits Soc It Telecom Siemens A ringer
FR2121456B1 (en:Method) * 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 (16)

* 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
NL212181A (en:Method) * 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
BE557708A (en:Method) * 1956-06-07
DE1050832B (en:Method) * 1956-06-07 1959-02-19
BE563265A (en:Method) * 1956-06-22
BE565637A (en:Method) * 1957-03-14
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
DE1108748B (de) 1959-08-04 1961-06-15 Standard Elektrik Lorenz Ag Schaltungsanordnung fuer mit einem Transistor ausgeruestete Teilnehmerstationen

Also Published As

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

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