How to become an Office 2003-to-fax service provider?

Hi!
I am interested in becoming an Internet fax provider. I have Cisco AS5350 capable of sending T.37 faxes to/from email. I'd like to integrate this feature into MS Office 2003 environment using its Internet Fax feature. Unfortunately, I was unable to find any technical information regarding the implementation of this feature on microsoft.com and msdn websites. I know it's done through registry settings but I couldn't find any info what those settings should be.

Could you please help me to find some technical info regarding this problem?

Thank you in advance.