I'd like to confirm if VVX 500/501s in fact support PoE 802.3at standard.
Datasheet states "Built-in auto sensing IEEE 802.3 at Power over Ethernet (Class 4)", though FAQ I've found here https://www.polycom.com/content/dam/polycom/common/documents/faqs/vvx500-faq-enus.pdf states "PoE supports IEEE 802.af Power Over Ethernet Class (Class 4) Standards."
The rest of VVX line of phones (including VVX 601) have 802.af in the datasheets, so I'd like to confirm if VVX501 is in fact the only model that supports "at" or it was a typo in the datasheet?