1.Dual power supply backups chassis 2.10Base-T interface network management 3.16 service slots 4.Supper Access Platform SPC-CHAS02 Management ... Order Information SPC-CHAS02AC 19'' rack, managed by network, 18 slots, including 16 data slots and 2 power slots, 4U hight, ... , dual power backupsSPC-CHAS02-DC19'' rack, managed by network, 18 slots, including 16 data slots and 2 power slots, 4U hight, power ...