Quotables
"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 3963874 | Busy-test arrangement for electronic private automatic branch exchange In an electronic private automatic branch exchange telephone system, busy test is carried out by way of a two step process. Initially, a junctor memory is scanned and the called number is compared with each ING and ED number contained in memory. At the co... | 06/15/1976 |
| 3956595 | Circuitry for providing executive ringback in a PBX system In a telephone switching system wherein a plurality of line circuits are terminated in station sets, the line circuits are interconnectable to a plurality of trunk circuits through a multistage switching network. A call originated by a calling party to a ... | 05/11/1976 |
| 3944750 | Circuitry for providing call override in a PBX system In a telephone switching system wherein a plurality of line circuits are terminated in station sets, the line circuits are interconnectable to a plurality of trunk circuits through a multistage switching network. A call originated by a calling party to a ... | 03/16/1976 |
| 3943297 | Electronic private automatic branch exchange An electronic private automatic branch exchange is built around a space divided solid state matrix. One side of the solid matrix provides line appearances which are connected to line circuits, tone receivers, senders and operator loops. The other coordina... | 03/09/1976 |
| 3934095 | Method and system for short term queuing of telephone calls in automatic inter-city telephone call connection system The specification discloses a system for automatically controlling the connection of telephone calls between a plurality of input telephone trunk lines at a user's dedicated telephone switching facility and a preset number of output telephone trunk lines.... | 01/20/1976 |
