The 12-port 10/100/1000Base-T DES-6507 Combo Module from D-Link offers expanded functionality for the D-Link DES-6500 Chassis. It features 12 10/100/1000Base-T and 2 Small Form Pluggable (SFP) ports and is fully compliant with IEEE standards. It supports port auto-negotiation and MDI/MDI-X auto detection. The DES-6507 also supports back pressure Flow Control for half-duplex mode, and IEEE 802.3x compliant Flow Control for full-duplex mode.