Huawei OSN3500 Ultra Cross-connect and Syschronous Timeing Board. Higher order cross-connect capacity: 80 Gbit/s. Lower order cross-connect capacity: 20 Gbit/s. Access capacity: 58.75 Gbit/s. Supports the flexible service grooming and supports the fully non-blocking cross-connect, multicast, and broadcast services. Supports the tact switch and performs the protection switching without interrupting services. Supports the SNCP protection at the VC-4-4c, VC-4-8c, VC-4-16c, VC-4-64c, VC-4, VC-12, VC-3, and AU-3 levels. Supports VC-4-4c, VC-4-8c, VC-4-16c, and VC-4-64c concatenation services. Supports a maximum of 40 linear MSP groups. Supports a maximum of 12 ring MSP groups. Supports the 1+1 Hot Backup for the Cross-Connect and Timing Units (non-revertive, by default). Provides the standard system synchronization clock. Supports the processing of the S1 byte to realize the clock protection switching. Supports the extraction, insertion, and management of the SSM and clock ID. UXCSA is a Ultra Cross-Connect board for Huawei OSN3500, provide 80G High order, 20G Low order Cross-Connect capacity and 58.75G Access capacity. UXCSA have N1 version, part number is 03038341.