IT1130749B - Complesso per l'applicazione di segnali ad una linea telefonica - Google Patents
Complesso per l'applicazione di segnali ad una linea telefonicaInfo
- Publication number
- IT1130749B IT1130749B IT22303/80A IT2230380A IT1130749B IT 1130749 B IT1130749 B IT 1130749B IT 22303/80 A IT22303/80 A IT 22303/80A IT 2230380 A IT2230380 A IT 2230380A IT 1130749 B IT1130749 B IT 1130749B
- Authority
- IT
- Italy
- Prior art keywords
- complex
- signals
- application
- telephone line
- telephone
- Prior art date
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
- H04M19/005—Feeding arrangements without the use of line transformers
-
- 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)
- Power Engineering (AREA)
- Devices For Supply Of Signal Current (AREA)
- Amplifiers (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7904159A NL7904159A (nl) | 1979-05-28 | 1979-05-28 | Inrichting voor het toevoeren van signalen aan een telefoonlijn. |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8022303A0 IT8022303A0 (it) | 1980-05-23 |
IT1130749B true IT1130749B (it) | 1986-06-18 |
Family
ID=19833256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT22303/80A IT1130749B (it) | 1979-05-28 | 1980-05-23 | Complesso per l'applicazione di segnali ad una linea telefonica |
Country Status (11)
Country | Link |
---|---|
US (1) | US4310733A (it) |
JP (1) | JPS55161457A (it) |
AU (1) | AU534433B2 (it) |
BE (1) | BE883490A (it) |
CA (1) | CA1143494A (it) |
DE (1) | DE3019761C2 (it) |
FR (1) | FR2458183B1 (it) |
GB (1) | GB2051521B (it) |
IT (1) | IT1130749B (it) |
NL (1) | NL7904159A (it) |
SE (1) | SE8003864L (it) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3142201C2 (de) * | 1981-01-23 | 1984-02-23 | Mitel Corp., Kanata, Ontario | Gabelschaltung für eine Fernmelde-, insbesondere Fernsprechanlage |
NL8204377A (nl) * | 1982-11-12 | 1984-06-01 | Philips Nv | Abonneecircuit voor een telefoonnet. |
FR2564678B1 (fr) * | 1984-05-18 | 1986-09-12 | Thomson Csf Mat Tel | Interface de liaison de circuit d'abonne pour autocommutateur telephonique |
JPS60253364A (ja) * | 1984-05-30 | 1985-12-14 | Fujitsu Ltd | 内部終端形給電回路 |
US6678360B1 (en) | 1985-07-10 | 2004-01-13 | Ronald A. Katz Technology Licensing, L.P. | Telephonic-interface statistical analysis system |
AU593951B2 (en) * | 1986-10-20 | 1990-02-22 | Fujitsu Limited | An integrated ringing circuit and a ring trip circuit for the same |
AU3744093A (en) * | 1992-04-01 | 1993-11-08 | Siemens Aktiengesellschaft | Combined supply voltage connection and call A.C. voltage generator and connection for analog telephone receiver stations in extension installations |
US5600713A (en) * | 1994-11-15 | 1997-02-04 | Advanced Micro Devices, Inc. | On-board ring signal generator |
US6137189A (en) * | 1999-07-30 | 2000-10-24 | Intersil Corporation | Line circuit apparatus for supplying power to a telephone set in telecommunication systems |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4064377A (en) * | 1976-03-11 | 1977-12-20 | Wescom Switching, Inc. | Electronic hybrid and hybrid repeater |
US4041252A (en) * | 1976-06-07 | 1977-08-09 | North Electric Company | Transformerless two-wire/four-wire hybrid with DC sourcing capability |
FR2363952A1 (fr) * | 1976-09-03 | 1978-03-31 | Thomson Csf | Circuit de ligne telephonique |
GB1527293A (en) * | 1977-04-21 | 1978-10-04 | Garwell K | Composite collector load for class a semiconductor amplifier |
US4113996A (en) * | 1977-05-20 | 1978-09-12 | Bell Telephone Laboratories, Incorporated | Voltage controlled current sources for active hybrid circuit |
US4192978A (en) * | 1978-02-27 | 1980-03-11 | Vincent Ogden W | Operational amplifier hybrid system |
-
1979
- 1979-05-28 NL NL7904159A patent/NL7904159A/nl not_active Application Discontinuation
-
1980
- 1980-05-08 US US06/147,973 patent/US4310733A/en not_active Expired - Lifetime
- 1980-05-22 CA CA000352542A patent/CA1143494A/en not_active Expired
- 1980-05-23 IT IT22303/80A patent/IT1130749B/it active
- 1980-05-23 FR FR8011592A patent/FR2458183B1/fr not_active Expired
- 1980-05-23 SE SE8003864A patent/SE8003864L/ not_active Application Discontinuation
- 1980-05-23 GB GB8017182A patent/GB2051521B/en not_active Expired
- 1980-05-23 DE DE3019761A patent/DE3019761C2/de not_active Expired
- 1980-05-27 BE BE0/200774A patent/BE883490A/fr not_active IP Right Cessation
- 1980-05-27 AU AU58812/80A patent/AU534433B2/en not_active Ceased
- 1980-05-28 JP JP7025880A patent/JPS55161457A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
GB2051521B (en) | 1983-03-16 |
US4310733A (en) | 1982-01-12 |
BE883490A (fr) | 1980-11-27 |
CA1143494A (en) | 1983-03-22 |
AU534433B2 (en) | 1984-01-26 |
JPS55161457A (en) | 1980-12-16 |
GB2051521A (en) | 1981-01-14 |
SE8003864L (sv) | 1980-11-29 |
FR2458183B1 (fr) | 1986-04-18 |
NL7904159A (nl) | 1980-12-02 |
DE3019761A1 (de) | 1980-12-04 |
IT8022303A0 (it) | 1980-05-23 |
FR2458183A1 (fr) | 1980-12-26 |
DE3019761C2 (de) | 1983-12-22 |
AU5881280A (en) | 1980-12-04 |
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