| 摘要 |
<p>The invention comprises a method of determining an identity of an entity placing a call, the method comprising the steps of: analyzing a signal sample associated with the entity placing the call; performing a signal source recognition process on the signal sample to obtain a signal signature associated with the entity placing the call; and comparing the signal signature against signal signatures of entities known to place unsolicited calls; and determining if the call is likely to be an unsolicited call from the result of the signal signature comparison.</p> |
