IT7927756A0 - Circuito sensore di chiamata di servizio e di continuita'. - Google Patents
Circuito sensore di chiamata di servizio e di continuita'.Info
- Publication number
- IT7927756A0 IT7927756A0 IT7927756A IT2775679A IT7927756A0 IT 7927756 A0 IT7927756 A0 IT 7927756A0 IT 7927756 A IT7927756 A IT 7927756A IT 2775679 A IT2775679 A IT 2775679A IT 7927756 A0 IT7927756 A0 IT 7927756A0
- Authority
- IT
- Italy
- Prior art keywords
- sensor circuit
- service call
- continuity sensor
- continuity
- call
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/0096—Trunk circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/965,713 US4190745A (en) | 1978-12-01 | 1978-12-01 | Call for service and continuity sensor circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7927756A0 true IT7927756A0 (it) | 1979-11-30 |
IT1126449B IT1126449B (it) | 1986-05-21 |
Family
ID=25510377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT27756/79A IT1126449B (it) | 1978-12-01 | 1979-11-30 | Circuito sensore di chiamata di servizio e di continuita' |
Country Status (4)
Country | Link |
---|---|
US (1) | US4190745A (it) |
BE (1) | BE879468A (it) |
CA (1) | CA1128224A (it) |
IT (1) | IT1126449B (it) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL57011A (en) * | 1979-04-05 | 1982-05-31 | Tadiran Israel Elect Ind Ltd | Multi purpose current detector for pabx |
US4310725A (en) * | 1980-01-17 | 1982-01-12 | Solid State Systems, Inc. | Interface for private branch exchange |
US4311879A (en) * | 1980-06-02 | 1982-01-19 | Gte Automatic Electric Labs Inc. | AC Supervisory signal detector circuit |
US4398064A (en) * | 1981-12-28 | 1983-08-09 | Gte Automatic Electric Labs Inc. | Call-for-service and continuity sensor circuit |
US4645880A (en) * | 1984-09-27 | 1987-02-24 | Gte Communication Systems Corp. | Disconnect circuit for use between telephone switching systems |
CA1201228A (en) * | 1984-04-12 | 1986-02-25 | Puran S. Kasbia | Detection of ground or loop start configuration in telephone loop signalling circuit |
US4535201A (en) * | 1984-04-16 | 1985-08-13 | Northern Telecom Limited | Ground start detection in telephone loop signalling circuit |
US4593156A (en) * | 1984-05-18 | 1986-06-03 | Itt Corporation | Grounded tip detector |
GB2220820B (en) * | 1988-07-13 | 1992-07-08 | Philips Electronic Associated | Telephone line loop current regulator |
EP1142277B1 (de) | 1999-01-15 | 2004-12-15 | Infineon Technologies AG | Schaltungsanordnung zur signalisierung in telekommunikationsnetzen |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4126765A (en) * | 1977-12-12 | 1978-11-21 | Gte Automatic Electric Laboratories Incorporated | Detector circuit for sensing battery polarity and loop closure |
US4133982A (en) * | 1977-12-23 | 1979-01-09 | Gte Automatic Electric Laboratories Incorporated | AC supervisory signal detector circuit |
-
1978
- 1978-12-01 US US05/965,713 patent/US4190745A/en not_active Expired - Lifetime
-
1979
- 1979-10-18 BE BE2/58140A patent/BE879468A/fr not_active IP Right Cessation
- 1979-10-26 CA CA338,524A patent/CA1128224A/en not_active Expired
- 1979-11-30 IT IT27756/79A patent/IT1126449B/it active
Also Published As
Publication number | Publication date |
---|---|
BE879468A (fr) | 1980-02-15 |
IT1126449B (it) | 1986-05-21 |
US4190745A (en) | 1980-02-26 |
CA1128224A (en) | 1982-07-20 |
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