Description This is a NEW Cisco 4OC12X/POS-M-SC-B 4-port OC12/POS Eng3 Multi-mode XR 12000 Series Line Cards 4OC12X/POS-M-SC-B 4OC12XPOS-M-SC-B 4OC12X/POSMSCB,4OC12X/POS-M-SC-B
