I have a BCM50 with two IP remote sets. I have checked bothe set and both work. I have one in the same town as the BCM and it works OK. The second set in in a differant town and on a DSL line and I can only get it to work if I open the router completly up. If I open ports 51000 to 51200. The one in the town where the BCM is is on a Verizon network and the on that don't work is on a Embarq DSL. Does anyone have a answer for this?????