H3C SP-D 以太网交换机主机(24GE+4SFP,交流供电) H3C 以太网交换机光模块 SFP-GE-SX-MM850-D 光模块-SFP-GE-多模模块-(850nm,0.55km,LC) SFP-GE-LX-SM1310-D 光模块-SFP-GE-单模模块-(1310nm,10km,LC) SFP-GE-LH40-SM1310-D 光模块-SFP-GE-单模模块-(1310nm,40km,LC) SFP-GE-LH70-SM1550-D 光模块-SFP-GE-单模模块-(1550nm,70km,LC)