IT978365B - Circuito per la sorveglianza di collegamenti per impianti di commutazione telegrafica - Google Patents
Circuito per la sorveglianza di collegamenti per impianti di commutazione telegraficaInfo
- Publication number
- IT978365B IT978365B IT7319478A IT1947873A IT978365B IT 978365 B IT978365 B IT 978365B IT 7319478 A IT7319478 A IT 7319478A IT 1947873 A IT1947873 A IT 1947873A IT 978365 B IT978365 B IT 978365B
- Authority
- IT
- Italy
- Prior art keywords
- surveillance
- connections
- circuit
- switching systems
- telegraphic
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/16—Threshold monitoring
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Electronic Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2203180A DE2203180C3 (de) | 1972-01-24 | 1972-01-24 | Verbindungsüberwachungsschaltung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT978365B true IT978365B (it) | 1974-09-20 |
Family
ID=5833832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT7319478A IT978365B (it) | 1972-01-24 | 1973-01-23 | Circuito per la sorveglianza di collegamenti per impianti di commutazione telegrafica |
Country Status (15)
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037050A (en) * | 1976-05-26 | 1977-07-19 | Bell Telephone Laboratories, Incorporated | Fault isolation in communications circuits |
| US4084070A (en) * | 1977-01-21 | 1978-04-11 | Rca Corporation | Overcurrent protection circuit |
| DE4212742A1 (de) * | 1992-04-16 | 1993-10-21 | Bayerische Motoren Werke Ag | Verfahren zur Fehlererkennung bei einem Datenbus |
| FR2787584B1 (fr) * | 1998-12-18 | 2001-02-09 | Atral | Dispositif de detection de coupure d'une ligne electrique, en particulier d'une ligne telephonique |
| US6587050B2 (en) | 2001-07-24 | 2003-07-01 | Eaton Corporation | Oscillator activated continuity testing switch |
| US6653846B2 (en) | 2001-09-14 | 2003-11-25 | Eaton Corporation | Multifunction circuit continuity and sensor tester |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2949547A (en) * | 1958-06-13 | 1960-08-16 | Bell Telephone Labor Inc | Delay timer |
| BE620605A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1961-03-07 | |||
| US3317668A (en) * | 1963-08-15 | 1967-05-02 | Teletype Corp | Open line and busy line detection circuit |
| US3275850A (en) * | 1964-02-11 | 1966-09-27 | Itt | Timer |
| US3354323A (en) * | 1964-11-27 | 1967-11-21 | Test Corp Comp | Pulse generator with direct connection to output pulse former and time delay in branch circuit |
| US3414735A (en) * | 1965-12-03 | 1968-12-03 | Conductron Corp | Variable time constant learning means |
| DE1614530C2 (de) * | 1967-05-23 | 1975-11-27 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Schaltungsanordnung zur zeitabhängigen Steuerung von Relais |
| FR1605049A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1968-12-31 | 1972-08-28 |
-
0
- BE BE793396D patent/BE793396A/xx unknown
-
1972
- 1972-01-24 DE DE2203180A patent/DE2203180C3/de not_active Expired
- 1972-11-10 GB GB5190772A patent/GB1405154A/en not_active Expired
- 1972-11-23 CH CH1708072A patent/CH546522A/xx not_active IP Right Cessation
- 1972-11-24 AT AT1001872A patent/AT320751B/de not_active IP Right Cessation
- 1972-11-28 ZA ZA728424A patent/ZA728424B/xx unknown
- 1972-12-12 FR FR7244119A patent/FR2169038B1/fr not_active Expired
- 1972-12-20 AR AR245765A patent/AR194976A1/es active
-
1973
- 1973-01-05 US US321272A patent/US3887824A/en not_active Expired - Lifetime
- 1973-01-12 NL NL7300534A patent/NL7300534A/xx not_active Application Discontinuation
- 1973-01-22 LU LU66874A patent/LU66874A1/xx unknown
- 1973-01-23 IT IT7319478A patent/IT978365B/it active
- 1973-01-23 BR BR73519A patent/BR7300519D0/pt unknown
- 1973-01-23 SE SE7300913A patent/SE376705B/xx unknown
- 1973-01-23 DK DK36773A patent/DK140915C/da active
Also Published As
| Publication number | Publication date |
|---|---|
| GB1405154A (en) | 1975-09-03 |
| AR194976A1 (es) | 1973-08-30 |
| BR7300519D0 (pt) | 1973-09-20 |
| LU66874A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1973-07-27 |
| AT320751B (de) | 1975-02-25 |
| DE2203180C3 (de) | 1975-06-26 |
| CH546522A (de) | 1974-02-28 |
| FR2169038B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1977-07-22 |
| DE2203180A1 (de) | 1973-08-09 |
| DK140915B (da) | 1979-12-03 |
| DK140915C (da) | 1980-05-19 |
| US3887824A (en) | 1975-06-03 |
| BE793396A (fr) | 1973-06-28 |
| FR2169038A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1973-09-07 |
| DE2203180B2 (de) | 1974-11-14 |
| ZA728424B (en) | 1973-08-29 |
| NL7300534A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1973-07-26 |
| SE376705B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1975-06-02 |
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