NL7802420A - Weksignaalgenerator voor toepassing in een abonneeverbindingscircuit. - Google Patents

Weksignaalgenerator voor toepassing in een abonneeverbindingscircuit.

Info

Publication number
NL7802420A
NL7802420A NL7802420A NL7802420A NL7802420A NL 7802420 A NL7802420 A NL 7802420A NL 7802420 A NL7802420 A NL 7802420A NL 7802420 A NL7802420 A NL 7802420A NL 7802420 A NL7802420 A NL 7802420A
Authority
NL
Netherlands
Prior art keywords
application
signal generator
connection circuit
subscriber connection
weekly
Prior art date
Application number
NL7802420A
Other languages
English (en)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of NL7802420A publication Critical patent/NL7802420A/nl

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Filters And Equalizers (AREA)
  • Interface Circuits In Exchanges (AREA)
NL7802420A 1977-03-08 1978-03-06 Weksignaalgenerator voor toepassing in een abonneeverbindingscircuit. NL7802420A (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7706756A FR2383568A1 (fr) 1977-03-08 1977-03-08 Dispositif destine a engendrer un signal d'appel et utilisable notamment dans un joncteur d'abonne

Publications (1)

Publication Number Publication Date
NL7802420A true NL7802420A (nl) 1978-09-12

Family

ID=9187731

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7802420A NL7802420A (nl) 1977-03-08 1978-03-06 Weksignaalgenerator voor toepassing in een abonneeverbindingscircuit.

Country Status (8)

Country Link
US (1) US4174467A (nl)
JP (1) JPS53110410A (nl)
BE (1) BE864603A (nl)
DE (1) DE2807916C3 (nl)
FR (1) FR2383568A1 (nl)
GB (1) GB1548546A (nl)
NL (1) NL7802420A (nl)
SE (1) SE447043B (nl)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270028A (en) * 1979-09-24 1981-05-26 Gte Automatic Electric Laboratories Incorporated Digitally activated ringing circuit for generation of AC voltages
US4354062A (en) * 1980-01-31 1982-10-12 Bell Telephone Laboratories, Incorporated Communication system signaling circuit
NL8000859A (nl) * 1980-02-12 1981-09-01 Philips Nv Inrichting voor het toevoeren van een wekspanning aan een abonneelijn.
US4393491A (en) * 1980-11-05 1983-07-12 Anaconda-Ericsson Automatic self-test system for a digital multiplexed telecommunication system
US4524246A (en) * 1982-07-07 1985-06-18 Harris Corporation SLIC II--common-mode current rejection
IE54008B1 (en) * 1982-11-17 1989-05-10 Lake Electronic Tech Apparatus for delivering a signal on a telephone
US4500844A (en) * 1983-05-20 1985-02-19 At&T Bell Laboratories Ringing signal generator employing delta-modulation power amplification techniques
US5233649A (en) * 1990-08-30 1993-08-03 Guerra Jr Roy H Telephone ringing module
DE4406500A1 (de) * 1994-02-28 1995-08-31 Siemens Ag Schaltungsanordnung zur verlustarmen Erzeugung einer Wechselspannung
GB2358989B (en) * 2000-02-03 2004-01-21 Lake Electronic Tech A circuit for developing an ac ringing voltage from a dc voltage supply

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2138548B1 (nl) * 1971-05-19 1973-05-25 Ibm France
US3723662A (en) * 1971-12-09 1973-03-27 Gte Automatic Electric Lab Inc D.c. compensated subscriber interface transformer circuit for telephone system

Also Published As

Publication number Publication date
SE447043B (sv) 1986-10-20
GB1548546A (en) 1979-07-18
DE2807916A1 (de) 1978-09-21
US4174467A (en) 1979-11-13
DE2807916B2 (de) 1981-07-02
SE7802478L (sv) 1978-09-09
BE864603A (fr) 1978-09-06
JPS53110410A (en) 1978-09-27
FR2383568B1 (nl) 1979-07-13
JPS567341B2 (nl) 1981-02-17
FR2383568A1 (fr) 1978-10-06
DE2807916C3 (de) 1982-03-25

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Legal Events

Date Code Title Description
CNR Transfer of rights (patent application after its laying open for public inspection)

Free format text: S.A. TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES T.R.T.

BA A request for search or an international-type search has been filed
BV The patent application has lapsed
BB A search report has been drawn up
BV The patent application has lapsed