Quote Originally Posted by J.Azaria View Post
sr98: Just to clarify a bit (I'm not currently using a softphone btw, but might try it out in the coming weeks) what you're saying here is a) This field specifies ports local to *my network* for the softphone and b) these ports must either be forwarded to the softphone PC or said PC must be DMZ'd so that these ports are accessible for incoming traffic.

Is that correct?
Not entirely. I believe softphones are smart enough to traverse routers (just as you can put an ATA behind a router without DMZing it or opening / forwarding ports) using STUN or some other mechanism.