NL7011277A - - Google Patents
Info
- Publication number
- NL7011277A NL7011277A NL7011277A NL7011277A NL7011277A NL 7011277 A NL7011277 A NL 7011277A NL 7011277 A NL7011277 A NL 7011277A NL 7011277 A NL7011277 A NL 7011277A NL 7011277 A NL7011277 A NL 7011277A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84758169A | 1969-08-05 | 1969-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7011277A true NL7011277A (enExample) | 1971-02-09 |
Family
ID=25300976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7011277A NL7011277A (enExample) | 1969-08-05 | 1970-07-30 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3622709A (enExample) |
| BE (1) | BE754235A (enExample) |
| DE (1) | DE2038933A1 (enExample) |
| FR (1) | FR2057868A5 (enExample) |
| GB (1) | GB1322216A (enExample) |
| NL (1) | NL7011277A (enExample) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL289634A (enExample) * | 1962-03-01 | |||
| US3772477A (en) * | 1972-07-17 | 1973-11-13 | Bell Telephone Labor Inc | Telephone dial pulse detection circuit |
| US3819866A (en) * | 1972-12-18 | 1974-06-25 | Bell Telephone Labor Inc | Light coupled loop current detector |
| US3825682A (en) * | 1973-06-27 | 1974-07-23 | Rca Corp | Balanced line driver, line receiver system |
| US3914556A (en) * | 1974-06-12 | 1975-10-21 | Itt | On-hook and off-hook detector for telephone switching systems |
| FR2286573A1 (fr) * | 1974-09-24 | 1976-04-23 | Constr Telephoniques | Circuit d'exploration pour systeme de commutation |
| US3939308A (en) * | 1974-09-27 | 1976-02-17 | Gte Automatic Electric (Canada) Limited | Electronic side of line detector |
| US3999018A (en) * | 1975-03-05 | 1976-12-21 | Stromberg-Carlson Corporation | Timer associated with CB relay |
| US4027109A (en) * | 1975-06-27 | 1977-05-31 | Smith Lloyd M | Telephone call diverting system |
| GB1563803A (en) * | 1975-11-26 | 1980-04-02 | Post Office | Telecommunications transmission and signalling curcuits |
| US4099032A (en) * | 1977-03-25 | 1978-07-04 | Wescom, Inc. | Loop current detector |
| US4166931A (en) * | 1978-04-24 | 1979-09-04 | Bell Telephone Laboratories, Incorporated | Miniature bridge lifter for telephone lines |
| CH635216A5 (de) * | 1978-10-25 | 1983-03-15 | Hansjoerg Erne | Geraet zur ueberwachung des linienstromes in einer telefonleitung. |
| DE2850929C2 (de) * | 1978-11-24 | 1982-06-09 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Unterdrückung von Störspannungseinflüssen bei der Bewertung des Signalzustandes auf Übertragungsleitungen, insbesondere auf Teilnehmeranschlußleitungen in Fernsprechanlagen |
| JPS5637793A (en) * | 1979-09-05 | 1981-04-11 | Hitachi Ltd | Loop detecting circuit |
| US4389543A (en) * | 1980-12-18 | 1983-06-21 | Martus Granirer | Telephone-activated audio control circuit |
| US4454477A (en) * | 1982-04-28 | 1984-06-12 | At&T Bell Laboratories | Loop current detector with threshold setting impedance |
| EP0201635B1 (en) * | 1985-05-17 | 1991-12-18 | BELL TELEPHONE MANUFACTURING COMPANY Naamloze Vennootschap | Telecommunication line circuit |
| DE3525566A1 (de) * | 1985-07-15 | 1987-01-15 | Siemens Ag | Schaltungsanordnung zur erkennung von erdtastenfunktionen in fernsprechvermittlungsanlagen |
| EP0759672A1 (en) * | 1995-08-23 | 1997-02-26 | AT&T IPM Corp. | Minimally invasive current sensing circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA584209A (en) * | 1955-11-03 | 1959-09-29 | Pitlik Hillel | Electronic telephone subscriber's line circuit for neutralizing the effects of longitudinal induction and longitudinal unbalance |
| DE1073552B (de) * | 1956-12-07 | 1960-01-21 | Western Electric Company Incor porated New York N Y (V St A) | Schaltungsanordnung zur Übertragung von den Leitungszustand anzeigenden Informationen |
-
0
- BE BE754235D patent/BE754235A/xx unknown
-
1969
- 1969-08-05 US US847581A patent/US3622709A/en not_active Expired - Lifetime
-
1970
- 1970-07-30 FR FR7028186A patent/FR2057868A5/fr not_active Expired
- 1970-07-30 NL NL7011277A patent/NL7011277A/xx unknown
- 1970-08-04 GB GB3746570A patent/GB1322216A/en not_active Expired
- 1970-08-05 DE DE19702038933 patent/DE2038933A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB1322216A (en) | 1973-07-04 |
| DE2038933A1 (de) | 1971-02-18 |
| US3622709A (en) | 1971-11-23 |
| BE754235A (fr) | 1970-12-31 |
| FR2057868A5 (enExample) | 1971-05-21 |