kbit / s size adjustable Support L2 VPN, and EPL, EVPL, EPLn and EVPLn business Offers a variety of service interfaces and management interface 1.SDH service interface STM-1 electrical interface, STM-1/4/16 optical interface, STM-16 optical interfaces support given wavelength output can be directly docked with WDM equipment 2.PDH business electrical interface E1, T1, E3, DS3, E4 3.Ethernet Interface 4.Clock Interface 5.Alarm Interface 6.Management interface 7.Official Interface Cross-capacity Cross clock board High order cross ability Low order cross ability CXL1/4/16 20G 5G Device-level protection 1.TPS 2.Cross clock 1 +1 protection 3.Master 1 +1 protection 4.Power Protection TNT,Original Huawei package