BE858816A - DEVELOPMENT AT TELECOMMUNICATION CENTRALS - Google Patents
DEVELOPMENT AT TELECOMMUNICATION CENTRALSInfo
- Publication number
- BE858816A BE858816A BE181006A BE181006A BE858816A BE 858816 A BE858816 A BE 858816A BE 181006 A BE181006 A BE 181006A BE 181006 A BE181006 A BE 181006A BE 858816 A BE858816 A BE 858816A
- Authority
- BE
- Belgium
- Prior art keywords
- centrals
- telecommunication
- development
- telecommunication centrals
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/001—Current supply source at the exchanger providing current to substations
- H04M19/005—Feeding arrangements without the use of line transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB38555/76A GB1584778A (en) | 1976-09-17 | 1976-09-17 | Telecommunication exchanges |
Publications (1)
Publication Number | Publication Date |
---|---|
BE858816A true BE858816A (en) | 1978-01-16 |
Family
ID=10404250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE181006A BE858816A (en) | 1976-09-17 | 1977-09-16 | DEVELOPMENT AT TELECOMMUNICATION CENTRALS |
Country Status (8)
Country | Link |
---|---|
BE (1) | BE858816A (en) |
CA (1) | CA1089131A (en) |
DE (1) | DE2741667A1 (en) |
FR (1) | FR2365252A1 (en) |
GB (1) | GB1584778A (en) |
NL (1) | NL7710118A (en) |
SE (1) | SE425537B (en) |
ZA (1) | ZA775490B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0385084A3 (en) * | 1989-01-27 | 1990-11-22 | BASF Aktiengesellschaft | Plant protection agents containing 1-aryl or 1-hetaryl imidazole carbonic-acid esters |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4254305A (en) * | 1979-02-07 | 1981-03-03 | International Telephone And Telegraph Corporation | Current limited subscriber line feed circuit |
US4272648A (en) * | 1979-11-28 | 1981-06-09 | International Telephone And Telegraph Corporation | Gain control apparatus for digital telephone line circuits |
US5274703A (en) * | 1991-05-23 | 1993-12-28 | At&T Bell Laboratories | Automatic loss control circuit |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1299735B (en) * | 1965-08-04 | 1969-07-24 | Siemens Ag | Circuit arrangement for telephone systems, in particular private branch exchanges with telephone stations, which have an automatic attenuation compensation |
US3781481A (en) * | 1971-09-30 | 1973-12-25 | Stromberg Carlson Corp | Amplifier select and control circuit |
DE2250651B2 (en) * | 1972-10-16 | 1975-06-19 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Circuit arrangement for attenuation compensation in a private branch exchange with four-wire connection paths |
DE2347696C3 (en) * | 1973-09-21 | 1978-12-21 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Circuit arrangement for feeding subscriber lines in telephone switching systems |
US3903378A (en) * | 1974-03-27 | 1975-09-02 | Gte Automatic Electric Lab Inc | Arrangement for controlling the gain of two-way amplifiers in accordance with loop lengths |
-
1976
- 1976-09-17 GB GB38555/76A patent/GB1584778A/en not_active Expired
-
1977
- 1977-09-13 ZA ZA00775490A patent/ZA775490B/en unknown
- 1977-09-15 NL NL7710118A patent/NL7710118A/en not_active Application Discontinuation
- 1977-09-15 SE SE7710346A patent/SE425537B/en not_active IP Right Cessation
- 1977-09-16 CA CA286,926A patent/CA1089131A/en not_active Expired
- 1977-09-16 FR FR7728078A patent/FR2365252A1/en active Granted
- 1977-09-16 DE DE19772741667 patent/DE2741667A1/en active Granted
- 1977-09-16 BE BE181006A patent/BE858816A/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0385084A3 (en) * | 1989-01-27 | 1990-11-22 | BASF Aktiengesellschaft | Plant protection agents containing 1-aryl or 1-hetaryl imidazole carbonic-acid esters |
Also Published As
Publication number | Publication date |
---|---|
FR2365252B1 (en) | 1982-03-26 |
GB1584778A (en) | 1981-02-18 |
SE425537B (en) | 1982-10-04 |
FR2365252A1 (en) | 1978-04-14 |
NL7710118A (en) | 1978-03-21 |
CA1089131A (en) | 1980-11-04 |
SE7710346L (en) | 1978-03-18 |
DE2741667C2 (en) | 1987-09-24 |
ZA775490B (en) | 1978-07-26 |
DE2741667A1 (en) | 1978-03-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: GEC PLESSEY TELECOMMUNICATIONS LTD Effective date: 19920930 |