IE51482B1 - Improvements in or relating to electronic intercommunication installations - Google Patents
Improvements in or relating to electronic intercommunication installationsInfo
- Publication number
- IE51482B1 IE51482B1 IE839/81A IE83981A IE51482B1 IE 51482 B1 IE51482 B1 IE 51482B1 IE 839/81 A IE839/81 A IE 839/81A IE 83981 A IE83981 A IE 83981A IE 51482 B1 IE51482 B1 IE 51482B1
- Authority
- IE
- Ireland
- Prior art keywords
- installation
- terminals
- connection
- central unit
- external lines
- Prior art date
Links
- 238000009434 installation Methods 0.000 title claims abstract description 39
- 238000000429 assembly Methods 0.000 claims description 6
- 230000015654 memory Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 241000252233 Cyprinus carpio Species 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 230000011664 signaling Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000005728 strengthening Methods 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
- H04M9/007—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 wherein the key telephone sets are star-connected to a central unit by a limited number of lines
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Accommodation For Nursing Or Treatment Tables (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8008671A FR2481033B1 (fr) | 1980-04-16 | 1980-04-16 | Installation d'intercommunication electronique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE810839L IE810839L (en) | 1981-10-16 |
| IE51482B1 true IE51482B1 (en) | 1987-01-07 |
Family
ID=9241034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE839/81A IE51482B1 (en) | 1980-04-16 | 1981-04-14 | Improvements in or relating to electronic intercommunication installations |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS579190A (fr) |
| BE (1) | BE888435A (fr) |
| BR (1) | BR8102253A (fr) |
| DE (1) | DE3114977A1 (fr) |
| DK (1) | DK170081A (fr) |
| ES (1) | ES8203183A1 (fr) |
| FR (1) | FR2481033B1 (fr) |
| GB (1) | GB2075306B (fr) |
| IE (1) | IE51482B1 (fr) |
| IT (1) | IT1137365B (fr) |
| MX (1) | MX149212A (fr) |
| PT (1) | PT72871B (fr) |
| SE (1) | SE8102382L (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59228828A (ja) * | 1983-06-11 | 1984-12-22 | 萱沢 文男 | 眼体の螢光量測定装置 |
| US4638124A (en) * | 1984-09-21 | 1987-01-20 | Itt Corporation | Key telephone system with distributed control |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53119606A (en) * | 1977-03-28 | 1978-10-19 | Toshiba Corp | Double concentrating transmission system of tree-pair line |
| US4112261A (en) * | 1977-05-16 | 1978-09-05 | The Anaconda Company | Key telephone system and method |
-
1980
- 1980-04-16 FR FR8008671A patent/FR2481033B1/fr not_active Expired
-
1981
- 1981-04-10 GB GB8111345A patent/GB2075306B/en not_active Expired
- 1981-04-13 ES ES501298A patent/ES8203183A1/es not_active Expired
- 1981-04-13 BR BR8102253A patent/BR8102253A/pt unknown
- 1981-04-14 IT IT21158/81A patent/IT1137365B/it active
- 1981-04-14 IE IE839/81A patent/IE51482B1/en unknown
- 1981-04-14 DK DK170081A patent/DK170081A/da not_active IP Right Cessation
- 1981-04-14 DE DE19813114977 patent/DE3114977A1/de not_active Ceased
- 1981-04-14 SE SE8102382A patent/SE8102382L/ not_active Application Discontinuation
- 1981-04-15 MX MX186897A patent/MX149212A/es unknown
- 1981-04-15 PT PT72871A patent/PT72871B/fr unknown
- 1981-04-15 BE BE0/204495A patent/BE888435A/fr not_active IP Right Cessation
- 1981-04-15 JP JP5572781A patent/JPS579190A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BR8102253A (pt) | 1981-11-24 |
| IT8121158A0 (it) | 1981-04-14 |
| IE810839L (en) | 1981-10-16 |
| FR2481033A1 (fr) | 1981-10-23 |
| GB2075306A (en) | 1981-11-11 |
| ES501298A0 (es) | 1982-03-01 |
| FR2481033B1 (fr) | 1987-11-06 |
| BE888435A (fr) | 1981-07-31 |
| ES8203183A1 (es) | 1982-03-01 |
| GB2075306B (en) | 1985-02-13 |
| PT72871B (fr) | 1982-03-29 |
| PT72871A (fr) | 1981-05-01 |
| DK170081A (da) | 1981-10-17 |
| SE8102382L (sv) | 1981-10-17 |
| MX149212A (es) | 1983-09-23 |
| IT1137365B (it) | 1986-09-10 |
| JPS579190A (en) | 1982-01-18 |
| DE3114977A1 (de) | 1982-03-18 |
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