IT1025484B - Disposizione di segnalazione per sistemi telefonici di intercomunicazione in serie - Google Patents
Disposizione di segnalazione per sistemi telefonici di intercomunicazione in serieInfo
- Publication number
- IT1025484B IT1025484B IT2917974A IT2917974A IT1025484B IT 1025484 B IT1025484 B IT 1025484B IT 2917974 A IT2917974 A IT 2917974A IT 2917974 A IT2917974 A IT 2917974A IT 1025484 B IT1025484 B IT 1025484B
- Authority
- IT
- Italy
- Prior art keywords
- series
- telephone systems
- signaling arrangement
- intercommunication telephone
- intercommunication
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732356095 DE2356095C3 (de) | 1973-11-09 | 1973-11-09 | Signalverfahren für Fernsprechreihenanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1025484B true IT1025484B (it) | 1978-08-10 |
Family
ID=5897687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT2917974A IT1025484B (it) | 1973-11-09 | 1974-11-07 | Disposizione di segnalazione per sistemi telefonici di intercomunicazione in serie |
Country Status (8)
| Country | Link |
|---|---|
| AU (1) | AU7490474A (it) |
| BE (1) | BE821977R (it) |
| DE (1) | DE2356095C3 (it) |
| DK (1) | DK577074A (it) |
| ES (1) | ES431772A1 (it) |
| FR (1) | FR2251141B1 (it) |
| IT (1) | IT1025484B (it) |
| NL (1) | NL7414330A (it) |
-
1973
- 1973-11-09 DE DE19732356095 patent/DE2356095C3/de not_active Expired
-
1974
- 1974-10-31 AU AU74904/74A patent/AU7490474A/en not_active Expired
- 1974-11-04 NL NL7414330A patent/NL7414330A/xx unknown
- 1974-11-06 DK DK577074A patent/DK577074A/da unknown
- 1974-11-07 IT IT2917974A patent/IT1025484B/it active
- 1974-11-07 FR FR7436907A patent/FR2251141B1/fr not_active Expired
- 1974-11-08 BE BE2053967A patent/BE821977R/xx not_active IP Right Cessation
- 1974-11-08 ES ES431772A patent/ES431772A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL7414330A (nl) | 1975-05-13 |
| AU7490474A (en) | 1976-05-06 |
| DK577074A (it) | 1975-07-07 |
| DE2356095B2 (de) | 1978-10-19 |
| BE821977R (nl) | 1975-05-09 |
| DE2356095A1 (de) | 1975-05-28 |
| DE2356095C3 (de) | 1979-06-13 |
| FR2251141B1 (it) | 1978-09-15 |
| ES431772A1 (es) | 1976-09-01 |
| FR2251141A1 (it) | 1975-06-06 |
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