| 摘要 |
The invention allows for identification of potentially fraudulent activity in a communications network before a communication channel is established for the fraudulent activity. In one embodiment, an anti-fraud system (201) is employed in a cellular telecommunications network. The system (201) includes a signature device (202) which compares a signal characteristics of a call request signal from a cellular telephone (103) to stored signal characteristic information. This signal characteristic check is incorporated into an existing, pre-voice channel allocation, authorization protocol such that the signal characteristic check is completed prior to voice channel allocation. |
