SE8801048D0 - An ancillary device for a telephone connected to a telephone line - Google Patents

An ancillary device for a telephone connected to a telephone line

Info

Publication number
SE8801048D0
SE8801048D0 SE8801048A SE8801048A SE8801048D0 SE 8801048 D0 SE8801048 D0 SE 8801048D0 SE 8801048 A SE8801048 A SE 8801048A SE 8801048 A SE8801048 A SE 8801048A SE 8801048 D0 SE8801048 D0 SE 8801048D0
Authority
SE
Sweden
Prior art keywords
telephone
telephone line
ancillary device
line
ancillary
Prior art date
Application number
SE8801048A
Other languages
English (en)
Other versions
SE8801048L (sv
Inventor
M Kostner
J J N Bennedbaek
S A Nielsen
Original Assignee
Dancor Aps
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 Dancor Aps filed Critical Dancor Aps
Publication of SE8801048D0 publication Critical patent/SE8801048D0/sv
Publication of SE8801048L publication Critical patent/SE8801048L/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/663—Preventing unauthorised calls to a telephone set
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Selective Calling Equipment (AREA)
  • Telephone Function (AREA)
  • Communication Cables (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
SE8801048A 1987-10-30 1988-03-22 Tillsatsanordning foer en telefon ansluten till en telefonledning SE8801048L (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3736797 1987-10-30
DE19873740026 DE3740026A1 (de) 1987-10-30 1987-11-26 Zusatzeinrichtung zu einem an einer telefonleitung angeschlossenen telefon

Publications (2)

Publication Number Publication Date
SE8801048D0 true SE8801048D0 (sv) 1988-03-22
SE8801048L SE8801048L (sv) 1989-05-01

Family

ID=25861284

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8801048A SE8801048L (sv) 1987-10-30 1988-03-22 Tillsatsanordning foer en telefon ansluten till en telefonledning

Country Status (5)

Country Link
DE (1) DE3740026A1 (sv)
DK (1) DK158288A (sv)
GB (1) GB2212029A (sv)
NO (1) NO880103L (sv)
SE (1) SE8801048L (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140153C2 (de) * 1991-12-05 2003-04-03 Tenovis Gmbh & Co Kg Schaltungsanordnung für einen Fernsprechapparat mit einer Tonrufschaltung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673339A (en) * 1970-07-22 1972-06-27 Bell Telephone Labor Inc Artificial line busy circuit
FR2177236A5 (sv) * 1972-03-21 1973-11-02 Socotel

Also Published As

Publication number Publication date
DE3740026A1 (de) 1989-05-11
DK158288A (da) 1989-05-01
GB2212029A (en) 1989-07-12
SE8801048L (sv) 1989-05-01
DK158288D0 (da) 1988-03-23
GB8800631D0 (en) 1988-02-10
NO880103L (no) 1989-05-02
NO880103D0 (no) 1988-01-12

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Legal Events

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NAV Patent application has lapsed

Ref document number: 8801048-3

Effective date: 19900223