CH619578A5 - - Google Patents
Download PDFInfo
- Publication number
- CH619578A5 CH619578A5 CH1436477A CH1436477A CH619578A5 CH 619578 A5 CH619578 A5 CH 619578A5 CH 1436477 A CH1436477 A CH 1436477A CH 1436477 A CH1436477 A CH 1436477A CH 619578 A5 CH619578 A5 CH 619578A5
- Authority
- CH
- Switzerland
- Prior art keywords
- subscriber line
- chopper
- transistor
- resistor
- circuit
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000003252 repetitive effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/005—Interface circuits for subscriber lines
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7635606A FR2372554A1 (fr) | 1976-11-25 | 1976-11-25 | Equipement de ligne d'abonne pour central telephonique |
Publications (1)
Publication Number | Publication Date |
---|---|
CH619578A5 true CH619578A5 (sv) | 1980-09-30 |
Family
ID=9180323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1436477A CH619578A5 (sv) | 1976-11-25 | 1977-11-23 |
Country Status (21)
Country | Link |
---|---|
US (1) | US4133986A (sv) |
JP (1) | JPS5368108A (sv) |
AT (1) | AT364391B (sv) |
AU (1) | AU508108B2 (sv) |
BE (1) | BE861080A (sv) |
BR (1) | BR7707753A (sv) |
CA (1) | CA1074935A (sv) |
CH (1) | CH619578A5 (sv) |
DD (1) | DD134301A5 (sv) |
DE (1) | DE2751444C3 (sv) |
ES (1) | ES464223A1 (sv) |
FR (1) | FR2372554A1 (sv) |
GB (1) | GB1538017A (sv) |
HK (1) | HK5980A (sv) |
IT (1) | IT1090447B (sv) |
LU (1) | LU78569A1 (sv) |
MX (1) | MX143397A (sv) |
NL (1) | NL185435C (sv) |
OA (1) | OA05805A (sv) |
SE (1) | SE421577B (sv) |
ZA (1) | ZA777006B (sv) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7802421A (nl) * | 1978-03-06 | 1979-09-10 | Philips Nv | Voedingsschakeling voor een abonneelijnstroom- loop. |
FR2422300A1 (fr) * | 1978-04-03 | 1979-11-02 | Trt Telecom Radio Electr | Joncteur comportant un amplificateur de puissance symetrique pour alimenter la ligne d'abonne |
US4433215A (en) * | 1979-02-26 | 1984-02-21 | Tii Corporation | Solid state hybrid circuits |
US4387273A (en) * | 1980-08-25 | 1983-06-07 | International Telephone And Telegraph Corporation | Subscriber line interface circuit with impedance synthesizer |
DE3237652A1 (de) * | 1982-10-11 | 1984-04-12 | Siemens AG, 1000 Berlin und 8000 München | Fernsprechanlage |
US10720996B2 (en) * | 2016-08-19 | 2020-07-21 | Fujitsu Limited | Frequency characteristic adjustment circuit, optical transmission module using the same, and optical transceiver |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT291356B (de) * | 1969-05-09 | 1971-07-12 | Itt Austria | Schaltungsanordnung zur selbsttätigen Aufrechterhaltung der Symmetrie von Speiseschaltungen für Teilnehmerstellen in Fernmelde-Anlagen unter Verwendung von Transistoren |
FR2305080A1 (fr) * | 1975-03-20 | 1976-10-15 | Jeumont Schneider | Termineur electronique |
DE2556157C3 (de) * | 1975-12-11 | 1979-01-18 | Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin | Schaltungsanordnung für eine elektronische Teilnehmerspeisung |
-
1976
- 1976-11-25 FR FR7635606A patent/FR2372554A1/fr active Granted
-
1977
- 1977-11-11 AT AT0808677A patent/AT364391B/de not_active IP Right Cessation
- 1977-11-16 US US05/851,871 patent/US4133986A/en not_active Expired - Lifetime
- 1977-11-17 DE DE2751444A patent/DE2751444C3/de not_active Expired
- 1977-11-17 ES ES464223A patent/ES464223A1/es not_active Expired
- 1977-11-18 AU AU30758/77A patent/AU508108B2/en not_active Expired
- 1977-11-18 NL NLAANVRAGE7712719,A patent/NL185435C/xx not_active IP Right Cessation
- 1977-11-18 OA OA56319A patent/OA05805A/xx unknown
- 1977-11-21 JP JP13978677A patent/JPS5368108A/ja active Pending
- 1977-11-22 BR BR7707753A patent/BR7707753A/pt unknown
- 1977-11-22 CA CA291,472A patent/CA1074935A/fr not_active Expired
- 1977-11-23 CH CH1436477A patent/CH619578A5/fr not_active IP Right Cessation
- 1977-11-23 LU LU78569A patent/LU78569A1/xx unknown
- 1977-11-23 GB GB48838/77A patent/GB1538017A/en not_active Expired
- 1977-11-23 BE BE1008535A patent/BE861080A/xx not_active IP Right Cessation
- 1977-11-23 DD DD77202217A patent/DD134301A5/xx unknown
- 1977-11-24 MX MX171448A patent/MX143397A/es unknown
- 1977-11-24 ZA ZA00777006A patent/ZA777006B/xx unknown
- 1977-11-24 IT IT51936/77A patent/IT1090447B/it active
- 1977-11-24 SE SE7713305A patent/SE421577B/sv not_active IP Right Cessation
-
1980
- 1980-02-21 HK HK59/80A patent/HK5980A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE2751444A1 (de) | 1978-06-01 |
AU3075877A (en) | 1979-05-24 |
DE2751444B2 (de) | 1981-05-14 |
US4133986A (en) | 1979-01-09 |
AT364391B (de) | 1981-10-12 |
NL185435B (nl) | 1989-11-01 |
SE7713305L (sv) | 1978-05-26 |
SE421577B (sv) | 1982-01-04 |
AU508108B2 (en) | 1980-03-06 |
FR2372554B1 (sv) | 1981-02-20 |
BE861080A (fr) | 1978-03-16 |
GB1538017A (en) | 1979-01-10 |
CA1074935A (fr) | 1980-04-01 |
OA05805A (fr) | 1981-05-31 |
MX143397A (es) | 1981-04-30 |
JPS5368108A (en) | 1978-06-17 |
DE2751444C3 (de) | 1982-02-18 |
HK5980A (en) | 1980-02-29 |
IT1090447B (it) | 1985-06-26 |
ZA777006B (en) | 1978-09-27 |
NL185435C (nl) | 1990-04-02 |
LU78569A1 (sv) | 1978-04-20 |
FR2372554A1 (fr) | 1978-06-23 |
ES464223A1 (es) | 1978-07-01 |
DD134301A5 (de) | 1979-02-14 |
NL7712719A (nl) | 1978-05-29 |
BR7707753A (pt) | 1978-08-01 |
ATA808677A (de) | 1981-03-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA1216906A (en) | Line powered modem | |
FR2542548A1 (fr) | Circuit d'interface de ligne telephonique | |
EP0022561A1 (fr) | Dispositif d'alimentation d'un poste d'abonné | |
EP0307781B1 (fr) | Système et dispositif de protection et de téléalimentation pour équipement connecté par deux transformateurs à une liaison de transmission à quatre fils | |
CH619578A5 (sv) | ||
IL27449A (en) | Telephone system plus installations for use by main lines by subscribers | |
US4489222A (en) | Telephone line interface | |
EP0072721B1 (fr) | Système de localisation de boucles et d'ouvertures dans une ligne bifilaire | |
EP0403999A1 (fr) | Joncteur de ligne réseau analogique pour installation téléphonique de type privé | |
FR2500241A1 (fr) | Circuit d'alimentation par batterie pour une installation telephonique | |
JPH11509056A (ja) | 改良送信/受信分離付きデータアクセス装置 | |
FR2460576A1 (fr) | Circuit d'alimentation a trois bornes pour appareil telephonique | |
FR2556909A1 (fr) | Dispositif d'interface pour un poste telephonique | |
EP0277855B1 (fr) | Convertisseur binaire-bipolaire | |
US3624300A (en) | Central office terminal unit for telephone carrier system | |
US3941941A (en) | Relayless switching circuit for application of ringing signals | |
EP0110444A1 (fr) | Générateur de signal de sonnerie | |
GB1577667A (en) | Time sampled or time division switching systems | |
US5471506A (en) | Method and apparatus for pulse communication | |
FR2473230A1 (fr) | Generateur de signaux electriques a puissance elevee | |
SU1084929A2 (ru) | Формирователь серии импульсов | |
US3109994A (en) | Multivibrator and amplifier powered by pulsating d. c. | |
SU1529468A1 (ru) | Устройство автоматического включени магнитофона | |
SU1172068A1 (ru) | Устройство питани дл абонентских телефонных установок | |
FR2491704A1 (fr) | Circuit d'alimentation d'une ligne telephonique |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUE | Assignment |
Owner name: JS TELECOM |
|
PL | Patent ceased |