The switch port that the 900 is on has to be a trunked port, meaning all VLANs that the phones are on and the native VLANs of those ports have to be presented to the 900 for broadcasts. So if your tagged phone VLAN is 20 and all native VLANS across the network are 1,2,3,4 and 5 then the 900 needs to be on a switch port that has all VLANS on it, 1,2,3,4,5 and 20. If you still can't talk to the 900 then there is a bigger problem than the setup. Time to call esi.
Edited by SST (04/07/17 11:47 PM)