| 摘要 |
A telephone exchange ( 1 ) arranged to communicate with communication units ( 2, 3, 4, 5, 7 ) and to provide a plurality of electronic call assistants to the communication units, a first electronic call assistant ( 12 ) being provided to a first communication unit ( 2 ) and a second electronic call assistant ( 14 ) to a second communication unit ( 4 ), the first electronic call assistant ( 12 ) having access to a distinct first database ( 36 ), the second electronic call assistant ( 14 ) having access to a distinct second database ( 38 ), wherein the first ( 12 ) and second ( 14 ) electronic call assistants share a common database ( 40 ). |
