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SE8203970L - Fasttillstandstelefonledningsgrenssnittkrets med ringningsformaga - Google Patents

Fasttillstandstelefonledningsgrenssnittkrets med ringningsformaga

Info

Publication number
SE8203970L
SE8203970L SE8203970A SE8203970A SE8203970L SE 8203970 L SE8203970 L SE 8203970L SE 8203970 A SE8203970 A SE 8203970A SE 8203970 A SE8203970 A SE 8203970A SE 8203970 L SE8203970 L SE 8203970L
Authority
SE
Sweden
Prior art keywords
amplifier
voltage
converter
high voltage
standard
Prior art date
Application number
SE8203970A
Other languages
Unknown language ( )
English (en)
Swedish (sv)
Other versions
SE8203970D0 (sv
Inventor
D M Bolus
Jr R C W Chea
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of SE8203970D0 publication Critical patent/SE8203970D0/xx
Publication of SE8203970L publication Critical patent/SE8203970L/

Links

Classifications

    • 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
    • H04M19/008—Using DC/DC converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • 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)
  • Devices For Supply Of Signal Current (AREA)
SE8203970A 1981-07-09 1982-06-28 Fasttillstandstelefonledningsgrenssnittkrets med ringningsformaga SE8203970L (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/281,545 US4431868A (en) 1981-07-09 1981-07-09 Solid state telephone line interface circuit with ringing capability

Publications (2)

Publication Number Publication Date
SE8203970D0 SE8203970D0 (sv) 1982-06-28
SE8203970L true SE8203970L (sv) 1983-01-10

Family

ID=23077742

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8203970A SE8203970L (sv) 1981-07-09 1982-06-28 Fasttillstandstelefonledningsgrenssnittkrets med ringningsformaga

Country Status (10)

Country Link
US (1) US4431868A (no)
BE (1) BE893779A (no)
CH (1) CH657729A5 (no)
DE (1) DE3221693C2 (no)
ES (1) ES513878A0 (no)
FR (1) FR2509555A1 (no)
GB (1) GB2102249B (no)
IT (1) IT1198388B (no)
NO (1) NO157039C (no)
SE (1) SE8203970L (no)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4897871A (en) * 1980-04-04 1990-01-30 Siemens Corporation Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line
US4514595A (en) * 1982-06-10 1985-04-30 Northern Telecom Limited Active impedance line feed circuit
DE3237652A1 (de) * 1982-10-11 1984-04-12 Siemens AG, 1000 Berlin und 8000 München Fernsprechanlage
JPS59125157A (ja) * 1982-12-30 1984-07-19 Fujitsu Ltd 給電回路
DE3330384A1 (de) * 1983-08-23 1985-03-07 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur erzeugung und anschaltung der rufsignalspannung fuer teilnehmerstationen eines digitalen zeitmultiplex-fernsprechsystems
CA1197641A (en) * 1983-08-26 1985-12-03 David E. Dodds Telephone line interface circuit
BE898051A (nl) * 1983-10-21 1984-04-24 Bell Telephone Mfg Telecommunicatielijnketen en bijbehorende polariteitsomkeerketen.
US4532381A (en) * 1984-02-13 1985-07-30 Northern Telecom Limited Active impedance line feed circuit
US4674119A (en) * 1984-04-10 1987-06-16 Itt Corporation Wide-band high voltage amplifier for telephone exchange subscriber line interface utilizing low voltage control circuitry
US4612417A (en) * 1984-07-27 1986-09-16 At&T Bell Laboratories Electronic battery feed circuit for telephone systems
US4598173A (en) * 1984-10-15 1986-07-01 Itt Corporation Interface circuit for a subscriber line circuit
US4689816A (en) * 1985-01-15 1987-08-25 D.A.V.I.D. Systems, Inc. Three relay C. O. trunk interface
CA1231480A (en) * 1985-03-15 1988-01-12 John A. Barsellotti Constant current line circuit
CA1233583A (en) * 1985-06-18 1988-03-01 Francis Y. Hung Protection arrangement for a telephone subscriber line interface circuit
US5511118A (en) * 1991-01-31 1996-04-23 Northern Telecom Limited Method of providing d.c. feed to a telephone line
US5103387A (en) * 1991-01-31 1992-04-07 Northern Telecom Limited High voltage converter
US5661794A (en) * 1992-04-16 1997-08-26 Northern Telecom Limited Telephone line interface circuit with voltage control
DE4105462C2 (de) * 1991-02-21 1994-03-17 Siemens Ag Verfahren und Anordnung zur Erzeugung einer Rufwechselspannung in einer Fernmeldeanlage
ES2046112B1 (es) * 1992-04-24 1996-11-16 Revenga Ingenieros S A Equipo telefonico para lineas directas punto a punto.
WO1994017619A1 (en) * 1993-01-28 1994-08-04 Northern Telecom Limited Method of providing d.c. feed to a telephone line
ATE166197T1 (de) * 1993-07-29 1998-05-15 St Microelectronics Srl Integrierte teilnehmerleitungsschnittstellenschaltung mit langsamem polaritätsumschalter
SE502276C2 (sv) * 1994-01-21 1995-09-25 Ericsson Telefon Ab L M Förfarande och anordning för generering av en ringsignal
EP0729259B1 (en) * 1995-02-01 2003-06-04 Advanced Micro Devices, Inc. Ring-signal generation in a slic
US5815569A (en) * 1996-06-27 1998-09-29 Lucent Technologies Inc. Method for controlling power losses associated with line interface circuits in telecommunications networks
FI104933B (fi) * 1997-11-18 2000-04-28 Nokia Networks Oy Tilaajajohtoliitäntäpiiri
FI104935B (fi) * 1997-11-18 2000-04-28 Nokia Networks Oy Tilaajajohtoliitäntäpiiri
FI104934B (fi) * 1997-11-18 2000-04-28 Nokia Networks Oy Tilaajajohtoliitäntäpiiri
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
IL131117A0 (en) * 1999-07-26 2001-01-28 Eci Telecom Ltd Sine wave generator suitable for ringer
WO2002021811A2 (en) * 2000-09-06 2002-03-14 Polycom, Inc. System and method for diagnosing a pots port
US7257222B2 (en) * 2004-04-30 2007-08-14 Infineon Technologies Ag Ring voltage generation circuit and method for generating a ring voltage
FR2883434B1 (fr) * 2005-03-21 2007-04-20 Commissariat Energie Atomique Methode et dispositif de demodulation a deux niveaux.
US8379839B2 (en) 2009-08-07 2013-02-19 Microsemi Semiconductor (U.S.) Inc. Method and apparatus for controlling ringing voltage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655005C3 (de) * 1976-12-02 1980-04-17 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Schaltungsanordnung für eine elektronische Teilnehmerspeisung
GB1583634A (en) * 1977-03-02 1981-01-28 Int Standard Electric Corp Subscriber line/trunk circuit
NL7810086A (nl) * 1978-10-06 1980-04-09 Philips Nv Voedingsbrug voor een abonneestroomloop.
CA1114536A (en) * 1978-12-11 1981-12-15 William B. Kiss Ringing generator
US4349703A (en) * 1980-03-31 1982-09-14 International Telephone And Telegraph Corporation Programmable ring signal generator

Also Published As

Publication number Publication date
ES8306556A1 (es) 1983-06-16
NO157039B (no) 1987-09-28
SE8203970D0 (sv) 1982-06-28
FR2509555B1 (no) 1985-02-01
GB2102249A (en) 1983-01-26
IT8222273A0 (it) 1982-07-07
FR2509555A1 (fr) 1983-01-14
DE3221693A1 (de) 1983-01-27
NO157039C (no) 1988-01-06
BE893779A (fr) 1983-01-07
CH657729A5 (de) 1986-09-15
DE3221693C2 (de) 1984-01-19
ES513878A0 (es) 1983-06-16
NO822247L (no) 1983-01-10
US4431868A (en) 1984-02-14
IT1198388B (it) 1988-12-21
GB2102249B (en) 1985-03-13

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