BE514857A - - Google Patents
Info
- Publication number
- BE514857A BE514857A BE514857DA BE514857A BE 514857 A BE514857 A BE 514857A BE 514857D A BE514857D A BE 514857DA BE 514857 A BE514857 A BE 514857A
- Authority
- BE
- Belgium
- Prior art keywords
- relay
- line
- wires
- wire
- switching
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 6
- 230000009699 differential effect Effects 0.000 claims 1
- 230000011664 signaling Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 244000309466 calf Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE514857A true BE514857A (enrdf_load_stackoverflow) |
Family
ID=152546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE514857D BE514857A (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE514857A (enrdf_load_stackoverflow) |
-
0
- BE BE514857D patent/BE514857A/fr unknown
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8744061B2 (en) | Systems and methods for call screening | |
| BE514857A (enrdf_load_stackoverflow) | ||
| US3133995A (en) | Call awaiting signal telephone circuits | |
| US2020816A (en) | Automatic telephone system | |
| US3538260A (en) | Dial controlled remote-to-local exchange repeater for a private exchange | |
| US2535652A (en) | Circuit arrangement for a subscriber's set of a telegraph system | |
| US3544730A (en) | Trunk signalling and supervision control | |
| US1484134A (en) | Telephone system | |
| US1629491A (en) | Program-selecting circuits | |
| US1868378A (en) | Switching arrangement for telephone plants | |
| US1345349A (en) | Telephone-exchange system | |
| US1312795A (en) | Telephone-exchange system | |
| US1272689A (en) | Telephone-exchange system. | |
| SU88727A1 (ru) | Схемы шнуровой пары декадно-шаговой автоматической телефонной станции | |
| US1263429A (en) | Telephone-exchange system. | |
| US1381483A (en) | Telephone-exchange system | |
| US1209834A (en) | Telephone-exchange system. | |
| US691060A (en) | Telephony. | |
| US3634630A (en) | Communication channel holding system for an automatic telephone exchange | |
| US1518736A (en) | Telephone system | |
| BE455605A (enrdf_load_stackoverflow) | ||
| BE482011A (enrdf_load_stackoverflow) | ||
| BE455512A (enrdf_load_stackoverflow) | ||
| BE413277A (enrdf_load_stackoverflow) | ||
| CH198010A (fr) | Installation téléphonique à batterie centrale. |