gatekeeper allows devices to register with them, allowing beter interaction of devices behind a firewall. softswitch does call routing, CDR generation, and proxy of calls ( h323 to sip conversion and vice versa ). if you want to see what a good softswitch does or is capable of, go to http://www.qtelnet.com and check out theirs. that will help you out. If you decide you want that one.. ( it works great, I’m using it right now ) contact peter. tell him that you need the free 2 port version.