Main Building has the x class system with ip card connected to a 24 port switch, also connected to that switch is a wireless access point. Second building has a wireless access point connected to a 24 port switch and the ip phone is connected to that switch. Wireless access points are configured in point to point bridge mode. At this point nothing else is connected to the switches. D-link says it should work, ESI says it should work but it doesn't!!. By going to remote phones it operates at layer 3 using ip addresses versus layer 2 with mac addresses.