| 摘要 |
<p>A digital telephony system which provides telephone services to a plurality of subscribers. The system includes a private branch exchange (PBX) which provides multiple analog telephone lines and includes an interface to a data link. The multi-user system which provides the telephone services to subscribers not associated with the PBX, is connected to the PBX by the analog telephone lines. A subscriber accesses the multi-user system by initiating a connection to the multi-user system such as a telephone connection or a message over a cellular network. The multi-user system receives information regarding the telephone connection over the data link thereby generating a call event; and triggers an action based on the information received by synchronizing one of the analog lines to the call event. Preferably the action includes intercepting, or call-back actions, which provide the services to the external subscribers using functionality available in the PBX.</p> |
