LU78546A1 - - Google Patents
Info
- Publication number
- LU78546A1 LU78546A1 LU78546A LU78546A LU78546A1 LU 78546 A1 LU78546 A1 LU 78546A1 LU 78546 A LU78546 A LU 78546A LU 78546 A LU78546 A LU 78546A LU 78546 A1 LU78546 A1 LU 78546A1
- Authority
- LU
- Luxembourg
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)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762655005 DE2655005C3 (en) | 1976-12-02 | 1976-12-02 | Circuit arrangement for an electronic subscriber feed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU78546A1 true LU78546A1 (en) | 1978-04-13 |
Family
ID=5994663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU78546A LU78546A1 (en) | 1976-12-02 | 1977-11-18 |
Country Status (13)
| Country | Link |
|---|---|
| AT (1) | AT363523B (en) |
| BE (1) | BE861297A (en) |
| CA (1) | CA1111586A (en) |
| CH (1) | CH630209A5 (en) |
| DE (1) | DE2655005C3 (en) |
| DK (1) | DK533777A (en) |
| FR (1) | FR2373201A1 (en) |
| GB (1) | GB1587868A (en) |
| IE (1) | IE45750B1 (en) |
| IT (1) | IT1088708B (en) |
| LU (1) | LU78546A1 (en) |
| NL (1) | NL7713305A (en) |
| SE (1) | SE7713728L (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4203009A (en) * | 1977-08-17 | 1980-05-13 | The Post Office | Unbalanced/balanced converter circuits |
| NL7810086A (en) * | 1978-10-06 | 1980-04-09 | Philips Nv | POWER BRIDGE FOR A SUBSCRIBER FLOW. |
| DE3014187C2 (en) * | 1980-04-14 | 1983-11-17 | Nixdorf Computer Ag, 4790 Paderborn | Circuit arrangement for the two-wire connection of a telephone subscriber to one line each for incoming and incoming signals |
| DE3032970A1 (en) * | 1980-09-02 | 1982-04-15 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Balanced signal derived from telephone line - has operational amplifier between constant current generators with input connection to potential divider |
| DE3116783C2 (en) * | 1981-04-28 | 1983-09-01 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Circuit arrangement for a subscriber line circuit for telephone systems |
| US4431868A (en) * | 1981-07-09 | 1984-02-14 | International Telephone And Telegraph Corporation | Solid state telephone line interface circuit with ringing capability |
| DE3138726A1 (en) * | 1981-09-29 | 1983-04-07 | Siemens AG, 1000 Berlin und 8000 München | Subscriber connection circuit for connecting two-wire subscriber connection lines to a four-wire through-connecting digital time division multiplex exchange |
| DE3214624C2 (en) * | 1982-04-20 | 1986-05-28 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for evaluating subscriber loop states in telephone systems, in particular in telephone branch exchange systems |
| BR8401869A (en) * | 1984-04-23 | 1985-11-26 | Microlab Sa | VOICE FREQUENCY REPEATER |
| FR2564678B1 (en) * | 1984-05-18 | 1986-09-12 | Thomson Csf Mat Tel | SUBSCRIBER CIRCUIT LINK INTERFACE FOR TELEPHONE SWITCH |
| DE4306251C1 (en) * | 1993-03-01 | 1994-06-01 | Bosch Telecom | Telecommunication system user connection line circuitry - indicates status of telephone user connection line according to call signal which switches transistor connected to operational amplifier inputs |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH586983A5 (en) * | 1974-12-23 | 1977-04-15 | Ibm | |
| DE2556157C3 (en) * | 1975-12-11 | 1979-01-18 | Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin | Circuit arrangement for an electronic subscriber feed |
-
1976
- 1976-12-02 DE DE19762655005 patent/DE2655005C3/en not_active Expired
-
1977
- 1977-11-18 LU LU78546A patent/LU78546A1/xx unknown
- 1977-11-24 CH CH1455077A patent/CH630209A5/en not_active IP Right Cessation
- 1977-11-29 BE BE183007A patent/BE861297A/en unknown
- 1977-11-30 FR FR7736123A patent/FR2373201A1/en not_active Withdrawn
- 1977-11-30 IE IE242877A patent/IE45750B1/en unknown
- 1977-12-01 NL NL7713305A patent/NL7713305A/en not_active Application Discontinuation
- 1977-12-01 DK DK533777A patent/DK533777A/en not_active Application Discontinuation
- 1977-12-01 AT AT0860777A patent/AT363523B/en not_active IP Right Cessation
- 1977-12-01 IT IT3024377A patent/IT1088708B/en active
- 1977-12-01 GB GB5018377A patent/GB1587868A/en not_active Expired
- 1977-12-02 CA CA292,254A patent/CA1111586A/en not_active Expired
- 1977-12-02 SE SE7713728A patent/SE7713728L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IT1088708B (en) | 1985-06-10 |
| BE861297A (en) | 1978-03-16 |
| ATA860777A (en) | 1981-01-15 |
| IE45750L (en) | 1978-06-02 |
| IE45750B1 (en) | 1982-11-17 |
| SE7713728L (en) | 1978-06-03 |
| FR2373201A1 (en) | 1978-06-30 |
| CA1111586A (en) | 1981-10-27 |
| AT363523B (en) | 1981-08-10 |
| CH630209A5 (en) | 1982-05-28 |
| DE2655005C3 (en) | 1980-04-17 |
| NL7713305A (en) | 1978-06-06 |
| DE2655005B2 (en) | 1979-08-09 |
| DK533777A (en) | 1978-06-03 |
| GB1587868A (en) | 1981-04-08 |
| DE2655005A1 (en) | 1978-06-15 |