AU7490474A - Signalling method for telephone serial intercommunication systems - Google Patents
Signalling method for telephone serial intercommunication systemsInfo
- Publication number
- AU7490474A AU7490474A AU74904/74A AU7490474A AU7490474A AU 7490474 A AU7490474 A AU 7490474A AU 74904/74 A AU74904/74 A AU 74904/74A AU 7490474 A AU7490474 A AU 7490474A AU 7490474 A AU7490474 A AU 7490474A
- Authority
- AU
- Australia
- Prior art keywords
- signalling method
- intercommunication systems
- telephone serial
- telephone
- serial intercommunication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (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 (en) | 1973-11-09 | 1973-11-09 | Signaling method for telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
AU7490474A true AU7490474A (en) | 1976-05-06 |
Family
ID=5897687
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU74904/74A Expired AU7490474A (en) | 1973-11-09 | 1974-10-31 | Signalling method for telephone serial intercommunication systems |
Country Status (8)
Country | Link |
---|---|
AU (1) | AU7490474A (en) |
BE (1) | BE821977R (en) |
DE (1) | DE2356095C3 (en) |
DK (1) | DK577074A (en) |
ES (1) | ES431772A1 (en) |
FR (1) | FR2251141B1 (en) |
IT (1) | IT1025484B (en) |
NL (1) | NL7414330A (en) |
-
1973
- 1973-11-09 DE DE19732356095 patent/DE2356095C3/en not_active Expired
-
1974
- 1974-10-31 AU AU74904/74A patent/AU7490474A/en not_active Expired
- 1974-11-04 NL NL7414330A patent/NL7414330A/en unknown
- 1974-11-06 DK DK577074A patent/DK577074A/da unknown
- 1974-11-07 IT IT2917974A patent/IT1025484B/en active
- 1974-11-07 FR FR7436907A patent/FR2251141B1/fr not_active Expired
- 1974-11-08 ES ES431772A patent/ES431772A1/en not_active Expired
- 1974-11-08 BE BE2053967A patent/BE821977R/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE2356095C3 (en) | 1979-06-13 |
IT1025484B (en) | 1978-08-10 |
DE2356095A1 (en) | 1975-05-28 |
DE2356095B2 (en) | 1978-10-19 |
ES431772A1 (en) | 1976-09-01 |
NL7414330A (en) | 1975-05-13 |
FR2251141B1 (en) | 1978-09-15 |
FR2251141A1 (en) | 1975-06-06 |
BE821977R (en) | 1975-05-09 |
DK577074A (en) | 1975-07-07 |
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