I'm using the SPA525G SIP with a hosted PBX (RingCentral). We have two of these phones at different locations, but both are connected via Verizon FIOS. Bandwidth is not an issue, but one phone sporadically reboots and recently has been dropping calls after a few minutes or so. Both phones have power bricks (not PoE) and are connected via Cat6 cables. Both phones also have fw 7.4.4.
QoS is mostly greater than 98%, but I've noticed on the problem phone there have been some QoS issues. We have QoS rules in place, but I'm at a loss as to why one phone works and the other is inconsistant. Any ideas?