Port Services

Hi,

I am using dial up to access internet and have a network card to link to another network device equipment. I do the enable internet connection sharing in the dial up and the internet is working fine.

However, I need to open up port number 2000 and 4000 for my equipment to work well. I am testing a ip phone equipment to make call and I can call out to another sites, but the other parties can't hear what I said. I add the port numbers in the service but I am still having the same problem. Can someone advise how to open up the port correctly?

thanks

Gad