BE871299A - SUBSCRIBE - Google Patents

SUBSCRIBE

Info

Publication number
BE871299A
BE871299A BE191151A BE191151A BE871299A BE 871299 A BE871299 A BE 871299A BE 191151 A BE191151 A BE 191151A BE 191151 A BE191151 A BE 191151A BE 871299 A BE871299 A BE 871299A
Authority
BE
Belgium
Prior art keywords
subscribe
Prior art date
Application number
BE191151A
Other languages
French (fr)
Original Assignee
Trt Telecom Radio Electr
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 Trt Telecom Radio Electr filed Critical Trt Telecom Radio Electr
Publication of BE871299A publication Critical patent/BE871299A/en

Links

Classifications

    • 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
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
BE191151A 1977-10-17 1978-10-16 SUBSCRIBE BE871299A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7731145A FR2406357A1 (en) 1977-10-17 1977-10-17 Circuit connecting subscriber line to telephone exchange - has balanced amplifier whose input is connected to one or other of two supply points (BE 17.4.79)

Publications (1)

Publication Number Publication Date
BE871299A true BE871299A (en) 1979-04-17

Family

ID=9196577

Family Applications (1)

Application Number Title Priority Date Filing Date
BE191151A BE871299A (en) 1977-10-17 1978-10-16 SUBSCRIBE

Country Status (3)

Country Link
AU (1) AU518635B2 (en)
BE (1) BE871299A (en)
FR (1) FR2406357A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7903663A (en) * 1979-05-10 1980-11-12 Philips Nv AMPLIFIER FOR APPLICATION IN A LINE CIRCUIT.
EP0029823B1 (en) * 1979-06-25 1984-03-14 Telecommunications Radioelectriques Et Telephoniques T.R.T. Current weighting circuit

Also Published As

Publication number Publication date
AU4075578A (en) 1980-04-24
AU518635B2 (en) 1981-10-08
FR2406357B1 (en) 1980-04-04
FR2406357A1 (en) 1979-05-11

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQ

Effective date: 19911031