IT1007249B - Sistema di segnalazione della condizione di linea - Google Patents
Sistema di segnalazione della condizione di lineaInfo
- Publication number
- IT1007249B IT1007249B IT20213/74A IT2021374A IT1007249B IT 1007249 B IT1007249 B IT 1007249B IT 20213/74 A IT20213/74 A IT 20213/74A IT 2021374 A IT2021374 A IT 2021374A IT 1007249 B IT1007249 B IT 1007249B
- Authority
- IT
- Italy
- Prior art keywords
- signaling system
- line condition
- condition signaling
- line
- signaling
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Interface Circuits In Exchanges (AREA)
- Electronic Switches (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7301959A NL7301959A (it) | 1973-02-12 | 1973-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1007249B true IT1007249B (it) | 1976-10-30 |
Family
ID=19818194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT20213/74A IT1007249B (it) | 1973-02-12 | 1974-02-06 | Sistema di segnalazione della condizione di linea |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US3935393A (it) |
| AR (1) | AR203742A1 (it) |
| BE (1) | BE810817A (it) |
| BR (1) | BR7400923D0 (it) |
| CH (1) | CH573694A5 (it) |
| DE (1) | DE2406128C3 (it) |
| ES (1) | ES423110A1 (it) |
| FR (1) | FR2217891B1 (it) |
| GB (1) | GB1423092A (it) |
| IT (1) | IT1007249B (it) |
| NL (1) | NL7301959A (it) |
| ZA (1) | ZA74205B (it) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0746128B1 (en) * | 1995-05-30 | 2002-09-25 | STMicroelectronics S.r.l. | Telephone interface circuit with impedance termination during call pauses |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB766563A (en) * | 1954-02-20 | 1957-01-23 | Automatic Telephone & Elect | Improvements in or relating to subscribers' line circuits for use in automatic telephone systems |
| NL112427C (it) * | 1956-12-07 | |||
| GB1095575A (it) * | 1964-07-25 | |||
| DE1218535B (de) * | 1965-03-10 | 1966-06-08 | Telefunken Patent | Schaltungsanordnung zur Feststellung des Belegungszustandes von Teilnehmerleitungen in Fernsprechanlagen |
| NL6712959A (it) * | 1967-09-22 | 1969-03-25 | ||
| DE1762356A1 (de) * | 1968-06-01 | 1970-04-23 | Telefunken Patent | Schaltungsanordnung zur UEberwachung der Betriebszustaende von Teilnehmeranschlussleitungen in Fernmelde-,insbesondere Fernsprechanlagen |
| FR2119188A5 (it) * | 1970-12-23 | 1972-08-04 | Constr Telephoniques | |
| US3713103A (en) * | 1971-06-29 | 1973-01-23 | Gte Automatic Electric Lab Inc | Remote contact sensing scanpoint matrix |
| FR2158619A5 (it) * | 1971-10-26 | 1973-06-15 | Constr Telephoniques | |
| US3855421A (en) * | 1972-01-26 | 1974-12-17 | Int Standard Electric Corp | Telephone subscriber line circuit |
| US3808377A (en) * | 1972-09-15 | 1974-04-30 | Gte Automatic Electric Lab Inc | Remote sensing circuit |
-
1973
- 1973-01-11 ZA ZA740205A patent/ZA74205B/xx unknown
- 1973-02-12 NL NL7301959A patent/NL7301959A/xx not_active Application Discontinuation
-
1974
- 1974-01-31 US US05/438,236 patent/US3935393A/en not_active Expired - Lifetime
- 1974-02-06 IT IT20213/74A patent/IT1007249B/it active
- 1974-02-07 GB GB567974A patent/GB1423092A/en not_active Expired
- 1974-02-08 BR BR923/74A patent/BR7400923D0/pt unknown
- 1974-02-08 DE DE2406128A patent/DE2406128C3/de not_active Expired
- 1974-02-08 FR FR7404221A patent/FR2217891B1/fr not_active Expired
- 1974-02-11 ES ES423110A patent/ES423110A1/es not_active Expired
- 1974-02-11 AR AR252300A patent/AR203742A1/es active
- 1974-02-11 BE BE2053412A patent/BE810817A/xx not_active IP Right Cessation
- 1974-02-12 CH CH191774A patent/CH573694A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE2406128A1 (de) | 1974-09-05 |
| FR2217891B1 (it) | 1977-09-09 |
| DE2406128C3 (de) | 1981-01-15 |
| BR7400923D0 (pt) | 1974-09-10 |
| BE810817A (nl) | 1974-08-12 |
| GB1423092A (en) | 1976-01-28 |
| AU6540274A (en) | 1975-08-14 |
| ZA74205B (en) | 1974-11-27 |
| DE2406128B2 (de) | 1980-05-08 |
| FR2217891A1 (it) | 1974-09-06 |
| ES423110A1 (es) | 1976-04-16 |
| US3935393A (en) | 1976-01-27 |
| CH573694A5 (it) | 1976-03-15 |
| AR203742A1 (es) | 1975-10-15 |
| NL7301959A (it) | 1974-08-14 |
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