SBS 4.5 – Names given to inbound faxes?

Hello:

We have an SBS 4.5 server and Exchange 5.5. We are receiving faxes through Exchange and saving them to the fax store.

How the heck does SBS determine the file name that it gives to the individual fax document?

In addition, are thereany options available to change the naming convention to make them more meaningful?

Thanks for your help!