There's one site I have that has a Logmein PC connected to the ECS. I usually can't even connect with LAN1, have to use Logmein while on site which is kind of a pain. This particular site as a 4VML or something similar but I've heard the reason for the connection trouble is due to the reason you mentioned.
This customer also just has a 4VML. Strange that 2 of their PCs can't connect and mine can. They may not be too concerned - it's a car dealership that has another in the state that's some other VoIP system. A new building is under construction down the road, due to be completed in September. Of course once that's done they'll go with the VoIP system. Most of the existing building's wiring is Cat3 and they don't want to invest in the cabling for VoIP which makes sense.
