CA1145496A - Circuit de ligne de telephone a clavier controle par micro-ordinateur - Google Patents
Circuit de ligne de telephone a clavier controle par micro-ordinateurInfo
- Publication number
- CA1145496A CA1145496A CA000361162A CA361162A CA1145496A CA 1145496 A CA1145496 A CA 1145496A CA 000361162 A CA000361162 A CA 000361162A CA 361162 A CA361162 A CA 361162A CA 1145496 A CA1145496 A CA 1145496A
- Authority
- CA
- Canada
- Prior art keywords
- key
- signal
- line
- response
- signaling
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 230000011664 signaling Effects 0.000 claims abstract description 35
- 230000004044 response Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims description 14
- 230000000007 visual effect Effects 0.000 claims 10
- 230000002401 inhibitory effect Effects 0.000 claims 5
- 230000000737 periodic effect Effects 0.000 claims 3
- 229940035564 duration Drugs 0.000 claims 1
- 230000006870 function Effects 0.000 abstract description 14
- 238000005286 illumination Methods 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 description 6
- 230000010354 integration Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- H04M9/006—Exchange line circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8158279A | 1979-10-03 | 1979-10-03 | |
| US81,582 | 1979-10-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1145496A true CA1145496A (fr) | 1983-04-26 |
Family
ID=22165069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000361162A Expired CA1145496A (fr) | 1979-10-03 | 1980-09-26 | Circuit de ligne de telephone a clavier controle par micro-ordinateur |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE884368A (fr) |
| CA (1) | CA1145496A (fr) |
| IT (1) | IT1132808B (fr) |
-
1980
- 1980-07-18 BE BE2/58656A patent/BE884368A/fr not_active IP Right Cessation
- 1980-09-26 CA CA000361162A patent/CA1145496A/fr not_active Expired
- 1980-09-29 IT IT24996/80A patent/IT1132808B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| BE884368A (fr) | 1980-11-17 |
| IT8024996A0 (it) | 1980-09-29 |
| IT1132808B (it) | 1986-07-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |