so ... i bought two 7975s to replace two SPA525Gs on an UC520 (SCCP).
so far i had no luck getting them to work. they hang at "obtaining IP address" (but that's just what the display says, in fact they successfully lease an IP) and their logs show dozens of TFTP errors and try to contact CME instances with weird hostnames that don't exist. also, it seems that unlike the SPA525Gs, the 7975s can't be FW updated via their web UIs, is that correct?
any ideas where i could start looking?