| 摘要 |
<p>The present invention enables a packet-switched network, e.g., a VolP network, to play a network announcement as to the true status of a subscribed residential user on busy or unanswered conditions. The called party can subscribe to this service feature so that callers, the calling parties, will be informed that either the user is busy or that the user is not present to receive a call.</p> |
