CA1089131A - Method and apparatus for compensating for variations in subscribers line lengths and apparatus - Google Patents
Method and apparatus for compensating for variations in subscribers line lengths and apparatusInfo
- Publication number
- CA1089131A CA1089131A CA286,926A CA286926A CA1089131A CA 1089131 A CA1089131 A CA 1089131A CA 286926 A CA286926 A CA 286926A CA 1089131 A CA1089131 A CA 1089131A
- Authority
- CA
- Canada
- Prior art keywords
- digital
- line
- gain
- regulator
- attenuation
- 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
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 claims 1
- 238000011156 evaluation Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 230000014616 translation Effects 0.000 description 1
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 (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB38555/76 | 1976-09-17 | ||
| GB38555/76A GB1584778A (en) | 1976-09-17 | 1976-09-17 | Telecommunication exchanges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1089131A true CA1089131A (en) | 1980-11-04 |
Family
ID=10404250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA286,926A Expired CA1089131A (en) | 1976-09-17 | 1977-09-16 | Method and apparatus for compensating for variations in subscribers line lengths and apparatus |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE858816A (enrdf_load_stackoverflow) |
| CA (1) | CA1089131A (enrdf_load_stackoverflow) |
| DE (1) | DE2741667A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2365252A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1584778A (enrdf_load_stackoverflow) |
| NL (1) | NL7710118A (enrdf_load_stackoverflow) |
| SE (1) | SE425537B (enrdf_load_stackoverflow) |
| ZA (1) | ZA775490B (enrdf_load_stackoverflow) |
Families Citing this family (4)
| 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 |
| DE3902439A1 (de) * | 1989-01-27 | 1990-08-02 | Basf Ag | Pflanzenschuetzende mittel auf basis von 1-aryl- bzw. 1-hetarylimidazolcarbonsaeureestern |
| US5274703A (en) * | 1991-05-23 | 1993-12-28 | At&T Bell Laboratories | Automatic loss control circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1299735B (de) * | 1965-08-04 | 1969-07-24 | Siemens Ag | Schaltungsanordnung fuer Fernsprechanlagen, insbesondere Nebenstellenanlagen mit Sprechstellen, die einen selbsttaetigen Daempfungsausgleich aufweisen |
| DE1287650C2 (de) * | 1966-10-18 | 1976-02-26 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Verfahren und schaltungsanordnung zur steuerung des verbindungsaufbaues in abhaengigkeit von informationen ueber die anschlussleitung |
| US3781481A (en) * | 1971-09-30 | 1973-12-25 | Stromberg Carlson Corp | Amplifier select and control circuit |
| DE2250651B2 (de) * | 1972-10-16 | 1975-06-19 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Schaltungsanordnung für den Dämpfungsausgleich in einer Nebenstellenanlage mit vierdrähtigen Verbindungswegen |
| DE2347696C3 (de) * | 1973-09-21 | 1978-12-21 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Schaltungsanordnung zum Speisen von Teilnehmeranschlußleitungen in Fernsprechvermittlungsanlagen |
| 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/xx unknown
- 1977-09-15 SE SE7710346A patent/SE425537B/xx not_active IP Right Cessation
- 1977-09-15 NL NL7710118A patent/NL7710118A/xx not_active Application Discontinuation
- 1977-09-16 FR FR7728078A patent/FR2365252A1/fr active Granted
- 1977-09-16 DE DE19772741667 patent/DE2741667A1/de active Granted
- 1977-09-16 CA CA286,926A patent/CA1089131A/en not_active Expired
- 1977-09-16 BE BE181006A patent/BE858816A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB1584778A (en) | 1981-02-18 |
| SE425537B (sv) | 1982-10-04 |
| FR2365252B1 (enrdf_load_stackoverflow) | 1982-03-26 |
| SE7710346L (sv) | 1978-03-18 |
| DE2741667C2 (enrdf_load_stackoverflow) | 1987-09-24 |
| NL7710118A (nl) | 1978-03-21 |
| DE2741667A1 (de) | 1978-03-23 |
| BE858816A (fr) | 1978-01-16 |
| FR2365252A1 (fr) | 1978-04-14 |
| ZA775490B (en) | 1978-07-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |