| 摘要 |
In a telephone system and method of operating it, a plurality of incoming trunks are fed to a network termination point, which is connected to a private branch exchange. A plurality of branch extensions is connected to the exchange. Signals are monitored on the trunks and extensions and signals compared in order, for example, to determine which extension is using a particular trunk where two extensions are talking to each other or which extensions are on a conference call. Comparison may employ a speech detection system or algorithms such as a cancellation algorithm. |
