Huawei TNZ2UXCL01 UXCL System Control, Cross-connect and Clock Board OSN 1800 The Huawei OptiX OSN1800 is a series of box architecture Multi-Service Optical Transport Network (MS-OTN) transmission equipment that supports Time Division Multiplexing (TDM), packet, and Optical Transmission Network (OTN) services over a metro or campus optical network. This equipment enables multiple high-bandwidth services (from 2 Mbit/s to 100 Gbit/s) to be delivered at less cost. TNZ2UXCL01 (Z2UXCL_Z1SCC_Z1STG) is a system control, cross-connect and clock board applied to Huawei OSN 1800 II Enhanced. The logical slots for the TNZ2UXCL board on the NMS are slots 7 (07/17/27) and 8 (08/18/28). The TNZ2UXCL board can be configured as the Z2UXCL/Z1SCC/Z1STG logical boards to provide the functions of a system control, cross-connect, and timing board and implement cross-connection of ODUk (k = 0, 1, 2, 2e, flex)/VC-4/VC-3/VC-12 services and switching of packet services.