MSN Voice connection

From: Norm Rasmussen (anonymous_at_discussions.microsoft.com)
Date: 02/25/05 

Date: Fri, 25 Feb 2005 10:35:58 -0800

I just recently changed from COmcast (cable) connection
to a T1 line (FDN Florida Digital Network) and can no
longer use the MSN voice connection. I have a tech person
that says we need to find the proper port number (he says
there are 65,000 of them)
Anybody know how I can proceed to find the proper port
number so I can use the voice again. He says that the
issue is the firewall.
Appreciate your help.
Norm