IT1198388B - Circuito di interfaccia di linea telefonica a stato solido,con capacita' di chiamata - Google Patents
Circuito di interfaccia di linea telefonica a stato solido,con capacita' di chiamataInfo
- Publication number
- IT1198388B IT1198388B IT22273/82A IT2227382A IT1198388B IT 1198388 B IT1198388 B IT 1198388B IT 22273/82 A IT22273/82 A IT 22273/82A IT 2227382 A IT2227382 A IT 2227382A IT 1198388 B IT1198388 B IT 1198388B
- Authority
- IT
- Italy
- Prior art keywords
- solid state
- interface circuit
- telephone line
- line interface
- call capacity
- Prior art date
Links
- 239000007787 solid Substances 0.000 title 1
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)
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 |
---|---|
IT8222273A0 IT8222273A0 (it) | 1982-07-07 |
IT1198388B true IT1198388B (it) | 1988-12-21 |
Family
ID=23077742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT22273/82A IT1198388B (it) | 1981-07-09 | 1982-07-07 | Circuito di interfaccia di linea telefonica a stato solido,con capacita' di chiamata |
Country Status (10)
Country | Link |
---|---|
US (1) | US4431868A (it) |
BE (1) | BE893779A (it) |
CH (1) | CH657729A5 (it) |
DE (1) | DE3221693C2 (it) |
ES (1) | ES8306556A1 (it) |
FR (1) | FR2509555A1 (it) |
GB (1) | GB2102249B (it) |
IT (1) | IT1198388B (it) |
NO (1) | NO157039C (it) |
SE (1) | SE8203970L (it) |
Families Citing this family (34)
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 |
US5661794A (en) * | 1992-04-16 | 1997-08-26 | Northern Telecom Limited | Telephone line interface circuit with voltage control |
US5103387A (en) * | 1991-01-31 | 1992-04-07 | Northern Telecom Limited | High voltage converter |
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. |
CA2152901C (en) * | 1993-01-28 | 1998-04-21 | Stanley Adam Gores | Method of providing d.c. feed to a telephone line |
DE69318551T2 (de) * | 1993-07-29 | 1998-09-10 | 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 |
ATE242571T1 (de) * | 1995-02-01 | 2003-06-15 | Advanced Micro Devices Inc | Rufsignalerzeugung in einer teilnehmerschaltung (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 |
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 |
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 |
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)
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 |
-
1981
- 1981-07-09 US US06/281,545 patent/US4431868A/en not_active Expired - Lifetime
-
1982
- 1982-06-09 DE DE3221693A patent/DE3221693C2/de not_active Expired
- 1982-06-28 SE SE8203970A patent/SE8203970L/ unknown
- 1982-06-30 NO NO822247A patent/NO157039C/no unknown
- 1982-07-06 GB GB08219550A patent/GB2102249B/en not_active Expired
- 1982-07-07 BE BE2/59766A patent/BE893779A/fr not_active IP Right Cessation
- 1982-07-07 IT IT22273/82A patent/IT1198388B/it active
- 1982-07-07 FR FR8211899A patent/FR2509555A1/fr active Granted
- 1982-07-09 CH CH4198/82A patent/CH657729A5/de not_active IP Right Cessation
- 1982-07-09 ES ES513878A patent/ES8306556A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NO157039B (no) | 1987-09-28 |
DE3221693A1 (de) | 1983-01-27 |
NO157039C (no) | 1988-01-06 |
GB2102249A (en) | 1983-01-26 |
IT8222273A0 (it) | 1982-07-07 |
GB2102249B (en) | 1985-03-13 |
CH657729A5 (de) | 1986-09-15 |
FR2509555B1 (it) | 1985-02-01 |
ES513878A0 (es) | 1983-06-16 |
DE3221693C2 (de) | 1984-01-19 |
SE8203970D0 (sv) | 1982-06-28 |
BE893779A (fr) | 1983-01-07 |
NO822247L (no) | 1983-01-10 |
SE8203970L (sv) | 1983-01-10 |
FR2509555A1 (fr) | 1983-01-14 |
US4431868A (en) | 1984-02-14 |
ES8306556A1 (es) | 1983-06-16 |
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