NO831051L - Koblingskrets for interntelefon - Google Patents
Koblingskrets for interntelefonInfo
- Publication number
- NO831051L NO831051L NO831051A NO831051A NO831051L NO 831051 L NO831051 L NO 831051L NO 831051 A NO831051 A NO 831051A NO 831051 A NO831051 A NO 831051A NO 831051 L NO831051 L NO 831051L
- Authority
- NO
- Norway
- Prior art keywords
- line
- circuit
- conductors
- direct current
- telephone
- Prior art date
Links
- 239000004020 conductor Substances 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract 2
- 230000008054 signal transmission Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 2
- 239000003990 capacitor Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
-
- 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
- H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Fishing Rods (AREA)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8212169A FR2530104B1 (fr) | 1982-07-12 | 1982-07-12 | Circuit de couplage de ligne additionnelle a un poste d'intercommunication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO831051L true NO831051L (no) | 1984-01-13 |
Family
ID=9275900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO831051A NO831051L (no) | 1982-07-12 | 1983-03-24 | Koblingskrets for interntelefon |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US4504702A (enExample) |
| EP (1) | EP0099761A3 (enExample) |
| JP (1) | JPS5962291A (enExample) |
| KR (1) | KR860001440B1 (enExample) |
| AU (1) | AU552598B2 (enExample) |
| BR (1) | BR8303408A (enExample) |
| CA (1) | CA1195019A (enExample) |
| DK (1) | DK241283A (enExample) |
| FR (1) | FR2530104B1 (enExample) |
| GR (1) | GR78899B (enExample) |
| IN (1) | IN157878B (enExample) |
| NO (1) | NO831051L (enExample) |
| NZ (1) | NZ204605A (enExample) |
| PT (1) | PT76608B (enExample) |
| ZA (1) | ZA832715B (enExample) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4575584A (en) * | 1984-07-05 | 1986-03-11 | Honeywell Inc. | Fail-safe digital phone |
| US5553117A (en) * | 1994-01-03 | 1996-09-03 | Danny R. Peterson | Vehicular communications system |
| US8400009B2 (en) * | 2006-10-30 | 2013-03-19 | Thales Avionics, Inc. | Interface for bulkhead monitor and method for using the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3459895A (en) * | 1966-05-19 | 1969-08-05 | Itt | Centrally powered subscriber carrier systems |
| US4125749A (en) * | 1975-08-09 | 1978-11-14 | Tamura Electric Works, Ltd. | Key telephone systems |
| US4061887A (en) * | 1976-04-23 | 1977-12-06 | Rolm Corporation | Key telephone adapter for electronic telephone switching system |
| US4112261A (en) * | 1977-05-16 | 1978-09-05 | The Anaconda Company | Key telephone system and method |
| JPS5552654A (en) * | 1978-10-14 | 1980-04-17 | Sumitomo Heavy Ind Ltd | Signal transmission system |
-
1982
- 1982-07-12 FR FR8212169A patent/FR2530104B1/fr not_active Expired
-
1983
- 1983-02-16 EP EP83400326A patent/EP0099761A3/fr not_active Withdrawn
- 1983-03-24 NO NO831051A patent/NO831051L/no unknown
- 1983-04-18 ZA ZA832715A patent/ZA832715B/xx unknown
- 1983-04-28 PT PT76608A patent/PT76608B/pt unknown
- 1983-05-27 DK DK241283A patent/DK241283A/da not_active Application Discontinuation
- 1983-06-16 NZ NZ204605A patent/NZ204605A/en unknown
- 1983-06-21 AU AU15975/83A patent/AU552598B2/en not_active Ceased
- 1983-06-27 BR BR8303408A patent/BR8303408A/pt unknown
- 1983-06-30 US US06/509,790 patent/US4504702A/en not_active Expired - Fee Related
- 1983-06-30 KR KR1019830002988A patent/KR860001440B1/ko not_active Expired
- 1983-07-04 GR GR71857A patent/GR78899B/el unknown
- 1983-07-11 CA CA000432195A patent/CA1195019A/en not_active Expired
- 1983-07-11 IN IN859/CAL/83A patent/IN157878B/en unknown
- 1983-07-11 JP JP58124876A patent/JPS5962291A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2530104A1 (fr) | 1984-01-13 |
| DK241283D0 (da) | 1983-05-27 |
| KR860001440B1 (ko) | 1986-09-24 |
| DK241283A (da) | 1984-01-13 |
| BR8303408A (pt) | 1984-11-06 |
| EP0099761A2 (fr) | 1984-02-01 |
| ZA832715B (en) | 1984-02-29 |
| US4504702A (en) | 1985-03-12 |
| GR78899B (enExample) | 1984-10-02 |
| PT76608B (fr) | 1985-12-10 |
| KR840005638A (ko) | 1984-11-14 |
| FR2530104B1 (fr) | 1986-10-24 |
| EP0099761A3 (fr) | 1984-12-27 |
| PT76608A (fr) | 1983-05-01 |
| JPS5962291A (ja) | 1984-04-09 |
| AU1597583A (en) | 1984-01-19 |
| IN157878B (enExample) | 1986-07-12 |
| NZ204605A (en) | 1985-08-30 |
| AU552598B2 (en) | 1986-06-05 |
| CA1195019A (en) | 1985-10-08 |
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