The VT861 is a 5U μTCA chassis that provides 12 AMC full size slots that can accept any AMC.1, AMC.2, AMC.3 and/or AMC.4. It provides CLK1, CLK2, and CLK3 to each slot. The VT861 has full redundancy on its Cooling Units. The CLK3 option can be configured for the Fabric clock, Telecom clock or Fabric B. There is an option for Port 2 and 3 to be directly connected among the adjacent AMCs or to the fabric B (AMC.3 SATA/SAS switch option on the MCH).