FR2147408A5 - - Google Patents
Info
- Publication number
- FR2147408A5 FR2147408A5 FR7127393A FR7127393A FR2147408A5 FR 2147408 A5 FR2147408 A5 FR 2147408A5 FR 7127393 A FR7127393 A FR 7127393A FR 7127393 A FR7127393 A FR 7127393A FR 2147408 A5 FR2147408 A5 FR 2147408A5
- Authority
- FR
- France
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7127393A FR2147408A5 (fr) | 1971-07-27 | 1971-07-27 | |
GB3401472A GB1353282A (en) | 1971-07-27 | 1972-07-20 | Circuit for detecting signals transmitted onto a two wire line |
DE19722236266 DE2236266B2 (de) | 1971-07-27 | 1972-07-24 | Anordnung zur Feststellung von Signalen in Form von Erdkriterien, die über die Sprechadern einer Fernsprechleitung übertragen werden |
BE786796A BE786796R (fr) | 1971-07-27 | 1972-07-27 | Circuit de test de l'etat d'une ligne a deux fils |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7127393A FR2147408A5 (fr) | 1971-07-27 | 1971-07-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2147408A5 true FR2147408A5 (fr) | 1973-03-09 |
Family
ID=9080962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7127393A Expired FR2147408A5 (fr) | 1971-07-27 | 1971-07-27 |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE786796R (fr) |
DE (1) | DE2236266B2 (fr) |
FR (1) | FR2147408A5 (fr) |
GB (1) | GB1353282A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0089355A1 (fr) * | 1981-09-30 | 1983-09-28 | Western Electric Co | Circuit detecteur pour lignes de communication. |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7904429A (nl) * | 1979-06-06 | 1980-12-09 | Philips Nv | Stroomdetectie-inrichting voor een automatische telefooncentrale. |
DE3108264C2 (de) * | 1981-03-05 | 1984-05-30 | Deutsche Fernsprecher Gesellschaft Mbh Marburg, 3550 Marburg | Schaltungsanordnung zur Erkennung des Schaltzustandes einer Erdtaste eines Fernsprechapparates |
DE3433330A1 (de) * | 1984-09-11 | 1986-03-20 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur indikation der erdung einer ader einer teilnehmerleitung bei erdtastendruck |
-
1971
- 1971-07-27 FR FR7127393A patent/FR2147408A5/fr not_active Expired
-
1972
- 1972-07-20 GB GB3401472A patent/GB1353282A/en not_active Expired
- 1972-07-24 DE DE19722236266 patent/DE2236266B2/de not_active Ceased
- 1972-07-27 BE BE786796A patent/BE786796R/fr active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0089355A1 (fr) * | 1981-09-30 | 1983-09-28 | Western Electric Co | Circuit detecteur pour lignes de communication. |
EP0089355A4 (fr) * | 1981-09-30 | 1985-07-01 | Western Electric Co | Circuit detecteur pour lignes de communication. |
Also Published As
Publication number | Publication date |
---|---|
DE2236266A1 (de) | 1973-02-08 |
DE2236266B2 (de) | 1978-03-23 |
GB1353282A (en) | 1974-05-15 |
BE786796R (fr) | 1973-01-29 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |