SE447043B - Ringsignalgenerator - Google Patents

Ringsignalgenerator

Info

Publication number
SE447043B
SE447043B SE7802478A SE7802478A SE447043B SE 447043 B SE447043 B SE 447043B SE 7802478 A SE7802478 A SE 7802478A SE 7802478 A SE7802478 A SE 7802478A SE 447043 B SE447043 B SE 447043B
Authority
SE
Sweden
Prior art keywords
signal
ring
level
level signal
signal generator
Prior art date
Application number
SE7802478A
Other languages
English (en)
Swedish (sv)
Other versions
SE7802478L (sv
Inventor
G M M Ferrieu
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 SE7802478L publication Critical patent/SE7802478L/xx
Publication of SE447043B publication Critical patent/SE447043B/sv

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)
SE7802478A 1977-03-08 1978-03-06 Ringsignalgenerator SE447043B (sv)

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 (2)

Publication Number Publication Date
SE7802478L SE7802478L (sv) 1978-09-09
SE447043B true SE447043B (sv) 1986-10-20

Family

ID=9187731

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7802478A SE447043B (sv) 1977-03-08 1978-03-06 Ringsignalgenerator

Country Status (8)

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

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 (ja) * 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
SE7802478L (sv) 1978-09-09
DE2807916C3 (de) 1982-03-25
DE2807916B2 (de) 1981-07-02
GB1548546A (en) 1979-07-18
JPS567341B2 (ja) 1981-02-17
JPS53110410A (en) 1978-09-27
DE2807916A1 (de) 1978-09-21
US4174467A (en) 1979-11-13
FR2383568B1 (ja) 1979-07-13
NL7802420A (nl) 1978-09-12
FR2383568A1 (fr) 1978-10-06
BE864603A (fr) 1978-09-06

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