Power over Ethernet Cabling Requirements
The 802.3af and 802.3at standards currently support PoE and PoE+ on 10/100/1000-Mbps Ethernet ports operating over standard Category 5 unshielded twisted pair (UTP) cable or better. If your network uses cabling categories less than Category 5, you cannot implement PoE without first upgrading your cables to Category 5 UTP cable or better. PoH has the following cabling requirements based on distance: