Description This is a NEW Cisco 4OC12X/POS-I-SC-B= 4 PORT OC12 POS B XR 12000 Series Line Cards 4OC12X/POS-I-SC-B= 4OC12XPOS-I-SC-B_ 4OC12X/POSISCB=,4OC12X/POS-I-SC-B=
