All phones are powered from wall warts, not PoE.Īlmost all phones are using passthrough to computers due to lack of cabling. The 504G has not rest in 166 days and it also has 7.5.2b firmware, so I don't know if this is a hardware thing or software.

I asked him to ask his vendor (Nextiva) if upgrading them to the current 7.6.2 SR7 firmware may help. The phones get DHCP-reserved IPs and I am going to set a couple of them static to see if it helps. Sometimes they will skip a day or two and not reset.

He said it happens every few days and has been happening for years, but looking at the phones' reboot history, it's almost every single day at the same time of day per phone, i.e., one does it at 10:18AM every day, and others do it at some other time of day, but each one does it nearly every 24 hours. Only the 303 phones have this spontaneous reset issue and there are lots of Google hits about these phones resetting. They have nine Cisco SPA303 phones, one Cisco SPA504G, and a couple Polycom phones. Well, replacement is at least 8 months away now and the phone resets are now an issue. I have a client who has been talking for a while about replacing his phones so I never really paid much attention to what is currently happening.

Cisco ip phone 303 screen lights