In the Asterisk: The Future of Telephony book, there is indication that for less than 3 lines (SOHO system), a computer with 1 GHz CPU and 512 MB RAM is recomended. In my office we are going to have 4 lines possible, with 6 phones. All 6 are going to be VOIP phones, and we may add a PSTN fax machine down the road. Will VOIP phones (I can use G.711, G.726, or G729 with my phones / provider) cut down on the load required of the asterisk server? Do you think a dual PIII 800 with 1 GB of RAM will suffice for my scenario?