Sorenson Router (SR-200) is Sorenson Branded router and is based on DI-604 Router's hardware design. But the software is sorenson's It is a 10/100 Fast Ethernet. It is 4 Ports meaning 4 computers or devices can be connected to SR-200 and is capable of becoming a dhcp server to 252 devices.
So one can add other computer to it. SR-200 is set up already and VP-200 has to be set to .125 DMZ and all other computer/devices need to be set to dhcp to receive dynamic ip addresses.
SR-200 would function better if the firmware is updated to 1.1. It can be done within admin control page.
Any further porting needs can consult this website;
http://www.alldeaf.com/deaf-products-technologies/42867-port-forwarding-guide-routers.html