The following Poly devices have been added to EPM as UNCERTIFIED as well as the dial timeout feature requested in FREEPBX-21692
Polycom VVX601
Polycom VVX501
Polycom VVX450
Polycom VVX401
Polycom VVX411
Polycom VVX350
Polycom VVX301
Polycom VVX311
Endpoint Manager versions 15.0.39.94 and 16.0.56.30 in edge now.
The canonical list of EPM supported devices is maintained here
https://sangomakb.atlassian.net/wiki/spaces/PG/pages/32080709/EPM-Supported+Devices