TW255085B - - Google Patents

Info

Publication number
TW255085B
TW255085B TW084100489A TW84100489A TW255085B TW 255085 B TW255085 B TW 255085B TW 084100489 A TW084100489 A TW 084100489A TW 84100489 A TW84100489 A TW 84100489A TW 255085 B TW255085 B TW 255085B
Authority
TW
Taiwan
Prior art keywords
subscriber line
current
input terminal
interface circuit
final stages
Prior art date
Application number
TW084100489A
Other languages
English (en)
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of TW255085B publication Critical patent/TW255085B/zh

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Burglar Alarm Systems (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Telephonic Communication Services (AREA)
TW084100489A 1994-01-21 1995-01-20 TW255085B (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9400185A SE502276C2 (sv) 1994-01-21 1994-01-21 Förfarande och anordning för generering av en ringsignal

Publications (1)

Publication Number Publication Date
TW255085B true TW255085B (zh) 1995-08-21

Family

ID=20392646

Family Applications (1)

Application Number Title Priority Date Filing Date
TW084100489A TW255085B (zh) 1994-01-21 1995-01-20

Country Status (15)

Country Link
US (1) US5553132A (zh)
EP (1) EP0740881B1 (zh)
JP (1) JP3457674B2 (zh)
KR (1) KR100265481B1 (zh)
CN (1) CN1083205C (zh)
AT (1) ATE230537T1 (zh)
BR (1) BR9506450A (zh)
CA (1) CA2179387A1 (zh)
DE (1) DE69529275T2 (zh)
FI (1) FI962918A0 (zh)
MX (1) MX9602380A (zh)
NO (1) NO314870B1 (zh)
SE (1) SE502276C2 (zh)
TW (1) TW255085B (zh)
WO (1) WO1995020290A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE506296C2 (sv) * 1995-12-01 1997-12-01 Ericsson Telefon Ab L M Förfarande och anordning för alstrande av en ringsignal
US6167135A (en) * 1995-12-01 2000-12-26 Telefonaktiebolaget Lm Ericsson Method and apparatus for generating a ringing signal
CN1063305C (zh) * 1998-08-15 2001-03-14 深圳市华为电气股份有限公司 中大功率铃流变换器的次级功率管驱动电路
CN1057183C (zh) * 1998-08-15 2000-10-04 深圳市华为电气股份有限公司 铃流发生器的缓起动与过流保护电路
CN1087546C (zh) * 1998-08-15 2002-07-10 深圳市安圣电气有限公司 小功率铃流发生器的次级信号切换电路
US6282238B1 (en) 1999-05-28 2001-08-28 3Com Corporation Adapter card that selects between an ISDN interface and an analog modem interface

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3689700A (en) * 1970-09-21 1972-09-05 Lear Siegler Inc Subscriber loop extension unit
US3723662A (en) * 1971-12-09 1973-03-27 Gte Automatic Electric Lab Inc D.c. compensated subscriber interface transformer circuit for telephone system
IT1079588B (it) * 1977-02-14 1985-05-13 Sits Soc It Telecom Siemens Generatore di chiamata statico per sistemi di telecomunicazioni
NL8000859A (nl) * 1980-02-12 1981-09-01 Philips Nv Inrichting voor het toevoeren van een wekspanning aan een abonneelijn.
US4431868A (en) * 1981-07-09 1984-02-14 International Telephone And Telegraph Corporation Solid state telephone line interface circuit with ringing capability
SE453240B (sv) * 1986-05-06 1988-01-18 Ericsson Telefon Ab L M Anordning i ett telekommunikationssystem for att strommata en telefonapparat

Also Published As

Publication number Publication date
NO962960D0 (no) 1996-07-15
EP0740881A1 (en) 1996-11-06
WO1995020290A1 (en) 1995-07-27
US5553132A (en) 1996-09-03
EP0740881B1 (en) 2003-01-02
CN1138399A (zh) 1996-12-18
NO314870B1 (no) 2003-06-02
NO962960L (no) 1996-07-15
SE502276C2 (sv) 1995-09-25
BR9506450A (pt) 1997-09-02
JPH09508244A (ja) 1997-08-19
KR100265481B1 (ko) 2000-09-15
DE69529275D1 (de) 2003-02-06
DE69529275T2 (de) 2003-08-28
CA2179387A1 (en) 1995-07-27
JP3457674B2 (ja) 2003-10-20
SE9400185L (sv) 1995-07-22
ATE230537T1 (de) 2003-01-15
FI962918A (fi) 1996-07-19
FI962918A0 (fi) 1996-07-19
SE9400185D0 (sv) 1994-01-21
MX9602380A (es) 1997-04-30
CN1083205C (zh) 2002-04-17

Similar Documents

Publication Publication Date Title
US4631359A (en) Arrangement for supplying current to a subscriber telephone set
TW255085B (zh)
US3731012A (en) Current limiting and resistance monitoring circuit
SE8205342D0 (sv) Metod och anordning vid strommatning av en abonnentapparat fran en telefonvexel
CA2076976A1 (en) Private telephone system with simplified command feature
ES8703076A1 (es) Un circuito de linea para la conexion de un abonado telefo- nico
WO1987000717A1 (en) A telephone line switch
ATE410025T1 (de) Schaltungsanordnung zur erzeugung von gebührenimpulsen
EP0211675A2 (en) Line terminating apparatus
FR2369740A1 (fr) Affaiblisseur a echelons
US5157720A (en) Dialler chip mode signal
US4346263A (en) Signalling arrangement for telephone equipment
CA1116767A (en) Electronic bridge circuit for supplying dc power and tone signals to subscriber line
FR2406357A1 (fr) Joncteur d'abonne telephonique
TW359914B (en) Power diverting device
FR2415405A1 (fr) Joncteur d'abonne utilisant des impulsions modulees en largeur pour engendrer les signaux d'appel et de taxation
FR2412995A2 (fr) Joncteur d'abonne telephonique
JPS63217892A (ja) 構内交換機における擬似線路挿入方法
SE9600925D0 (sv) Protection circuit
TH26171A (th) "การจัดวงจร"
CS264682B1 (cs) Zapojení pro připojování stejnosměrných impulsů k jednomu z vodičů vedení
DE60026172D1 (de) Teilnehmerleitungsschnittstellenschaltung

Legal Events

Date Code Title Description
MK4A Expiration of patent term of an invention patent