BE690855A - - Google Patents
Info
- Publication number
- BE690855A BE690855A BE690855DA BE690855A BE 690855 A BE690855 A BE 690855A BE 690855D A BE690855D A BE 690855DA BE 690855 A BE690855 A BE 690855A
- Authority
- BE
- Belgium
- Prior art keywords
- ringing
- secondary windings
- current
- circuit
- switching member
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims description 33
- 230000006872 improvement Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 230000011664 signaling Effects 0.000 description 13
- 238000012544 monitoring process Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/026—Arrangements for interrupting the ringing current
-
- 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)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51344965A | 1965-12-13 | 1965-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE690855A true BE690855A (enrdf_load_stackoverflow) | 1967-06-08 |
Family
ID=24043315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE690855D BE690855A (enrdf_load_stackoverflow) | 1965-12-13 | 1966-12-08 |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE690855A (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2390065A1 (en) * | 1977-05-03 | 1978-12-01 | Constr Telephoniques | Monitor for telephonic loop current detector logic state - uses transformer coupling to reference voltage and interrogation pulse source |
-
1966
- 1966-12-08 BE BE690855D patent/BE690855A/fr unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2390065A1 (en) * | 1977-05-03 | 1978-12-01 | Constr Telephoniques | Monitor for telephonic loop current detector logic state - uses transformer coupling to reference voltage and interrogation pulse source |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| BE690855A (enrdf_load_stackoverflow) | ||
| US2743315A (en) | Control circuits for telephone answering and recording devices | |
| US3499115A (en) | Intercom system in which master station controls operation of staff stations | |
| US3626101A (en) | Loop extender for subscribers connected to a central office by abnormally long telephone lines | |
| BE552594A (enrdf_load_stackoverflow) | ||
| US3511935A (en) | Automatic telephone answering device with a remote control system | |
| US2535652A (en) | Circuit arrangement for a subscriber's set of a telegraph system | |
| US2847509A (en) | Party line paystation identification | |
| US2356031A (en) | Telephone substation apparatus | |
| BE903101R (fr) | Contacts electroniques et dispositifs associes | |
| BE466692A (enrdf_load_stackoverflow) | ||
| CA1116329A (en) | Loop, dial pulse and ring trip detection circuit | |
| EP0632639B1 (fr) | Télécopieur à contrÔle du courant de boucle de ligne | |
| AT7049B (de) | Schaltungsanordnung zum selbstatthätigen Anrufen von Theilnehmerstellen durch Fernsprechvermittelungsämter. | |
| US1312688A (en) | Plancxtrai | |
| US934811A (en) | Means for reducing the reactance of electromagnetic devices for telephone-circuits. | |
| US681744A (en) | Telephone call-bell. | |
| US3749846A (en) | Ring trip circuit | |
| US921187A (en) | Telephone-exchange system. | |
| US684366A (en) | Telephone-exchange apparatus and circuit. | |
| US828218A (en) | Telephone apparatus. | |
| US1262912A (en) | Means for preventing disturbances in substation telephone sets. | |
| US563318A (en) | Charles e | |
| US848793A (en) | Relay structure. | |
| US2517643A (en) | Device for metering of communications by manual telephone system |