OLT 2000 has 4 types of board: 1 SCU, 4 LPU,1 Fan and 2 Powe board OLT 2000Feature listOLT SwitchSpecificationDescriptionBridgeL2 bridge: transparent(switch part); Simple bridge(PON part)VLANSwitch part: transparent mode, VID-tag mode;PON part: single VLAN mode, transparent mode, Translate mode, stacking tag mode.ACLBased on L2-L4 fields. Apply to NNI ports of switch or PON links or PON ...