Adtran NetVanta 1531P - Switch - 12 Ports - Managed - Desktop (1700571F1) 12-port multi-layer Gigabit Ethernet switch Ten 10/100/1000Base-T Ethernet ports and two 1 Gbps Small Form-factor Pluggable (SFP) optical ports Fanless design for quiet operation 802.3af (PoE), 802.3at (PoE+) and legacy PoE Non-blocking, up to 24 Gbps switching capacity