Do not buy this product. The hardware is fine - the software is absolute garbage. eg:- switching on vlans does not work in latest s/w except for the management vlan, nor the previous, and poe is also broken in the one before that- no password required to ssh as user admin- can not ssh as custom users- cli help is rather broken- for a cli that is Cisco-like, it is very broken. eg: "reload" will reset to factory defaults.- the webui is ok, not great.- do not load older s/w, it will likely be bricked - yes, i have a brick.if all you want is some poe/+ and non-vlan switching with no other features or security, this could be your switch. It is no wonder that our national infrastructure has security problems if this representative of the products used for industrial applications.There are many sellers of possibly the same h/w, but much better s/w, and less costly than this refurbished unit. For example, IES3110-8TFP-R .