Switch, Firewall, Server manufacturer / supplier in China, offering 03030qbm Cr5d00c4CF71 4-Port Channelized Stm-1c POS-SFP Physical Interface Card (PIC), 03030PCB Cr5d00p4CF70 4-Port Oc-3c/Stm-1c POS-SFP Flexible Interface Card (FIC), 03031hrn Cr5dp2c1hf70 2-Port Oc-3c/Stm-1c (or 1-Port OC-12c/STM-4C) POS-SFP Physical Interface Card (PIC) and so on.