Have been trying to configure five ATA-186 with a UC520 without success. The ATA boxes where pretty old and was running config 1.45 and 2.11 so first of all I upgraded them all to the latest firmware. I've given them static IP:s and can access the webconfig but I don't know how to config them from there, they won't show up in CCA unless I manually add them, and the analog phones attached can't call out or call in.
I figured I have to do some config on the ATAs itself? Last time I used ATA boxes things pretty much worked themself out when they showed up in CCA.
You have to make sure they are using SCCP and that they are pointing to the UC500. Then they should show up in CCA, but they will use a license: