IE870388L - Ringing voltage generator - Google Patents

Ringing voltage generator

Info

Publication number
IE870388L
IE870388L IE870388A IE38887A IE870388L IE 870388 L IE870388 L IE 870388L IE 870388 A IE870388 A IE 870388A IE 38887 A IE38887 A IE 38887A IE 870388 L IE870388 L IE 870388L
Authority
IE
Ireland
Prior art keywords
ringing voltage
opto
voltage generator
distribution line
ringing
Prior art date
Application number
IE870388A
Original Assignee
Lake Electronic Tech
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 Lake Electronic Tech filed Critical Lake Electronic Tech
Priority to IE870388A priority Critical patent/IE870388L/en
Priority to FR878702388A priority patent/FR2611101B1/en
Priority to NL8700678A priority patent/NL8700678A/en
Priority to ZA874531A priority patent/ZA874531B/en
Priority to GB8802917A priority patent/GB2202714B/en
Publication of IE870388L publication Critical patent/IE870388L/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

Abstract

A ringing voltage generator circuit comprises a transformer (TR1) the secondary winding (S1) of which delivers an AC output through an opto-coupled triac (161) to a ringing voltage distribution line (1). A control circuit comprising a micro-processor (IC2) and a transistor (T1) switch the opto-coupled triac (IC1) on and off to give the desired ringing voltage on the ringing voltage distribution line (1). A biasing resistor (R1) is connected between the ringing voltage distribution line (1) and a negative biasing voltage of -30 volts DC to return the voltage on the line 1 to -30 volts DC when the opto-coupled triac (IC1) switches off. <IMAGE> [GB2202714A]
IE870388A 1987-02-16 1987-02-16 Ringing voltage generator IE870388L (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
IE870388A IE870388L (en) 1987-02-16 1987-02-16 Ringing voltage generator
FR878702388A FR2611101B1 (en) 1987-02-16 1987-02-24 RINGER VOLTAGE GENERATOR FOR TELEPHONE INSTALLATION
NL8700678A NL8700678A (en) 1987-02-16 1987-03-23 CALL VOLTAGE GENERATOR.
ZA874531A ZA874531B (en) 1987-02-16 1987-06-23 A ringing voltage generator
GB8802917A GB2202714B (en) 1987-02-16 1988-02-09 A ringing voltage generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE870388A IE870388L (en) 1987-02-16 1987-02-16 Ringing voltage generator

Publications (1)

Publication Number Publication Date
IE870388L true IE870388L (en) 1988-08-16

Family

ID=11011678

Family Applications (1)

Application Number Title Priority Date Filing Date
IE870388A IE870388L (en) 1987-02-16 1987-02-16 Ringing voltage generator

Country Status (5)

Country Link
FR (1) FR2611101B1 (en)
GB (1) GB2202714B (en)
IE (1) IE870388L (en)
NL (1) NL8700678A (en)
ZA (1) ZA874531B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366756A1 (en) * 1976-09-30 1978-04-28 Labo Cent Telecommunicat Ringing signal generator for telephone networks - uses triacs instead of mechanical relays between subscriber and supply lines
IE54008B1 (en) * 1982-11-17 1989-05-10 Lake Electronic Tech Apparatus for delivering a signal on a telephone
IE54733B1 (en) * 1983-09-08 1990-01-17 Lake Electronics Ltd Provate automatic branch exchange
US4609782A (en) * 1983-12-27 1986-09-02 Motorola, Inc. Solid state signal insertion circuit and method for use in a telephony system or the like

Also Published As

Publication number Publication date
GB2202714B (en) 1990-09-12
FR2611101B1 (en) 1990-08-10
NL8700678A (en) 1988-09-16
ZA874531B (en) 1987-12-28
FR2611101A1 (en) 1988-08-19
GB2202714A (en) 1988-09-28
GB8802917D0 (en) 1988-03-09

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