Poly VVX 201,301 and 401 running 3PIP
After migrate one of my customer from Skype for Business server 2015 and hybrid, with Enterprise voice we started to plan for the VVX together with 3PIP.
For some time we saw that the VVX phones where working fine, but some started to logout for some reason after 48-72 hours. And the we was not able to login to them again.
We spoke to Poly Support and we tried to upgrade the firmware but it just hanged on the login. We looked at the Firewall but did not see anything. The customer also took the phone home and tried it from there.
Still the same problem.
What we found out together with the customer, is that you need to downgrade the firmware to this version
Then reboot the phone and it shall work just fine.