Cisco Systems 800-05491-05 OC12 POS Interface Card is a four-port OC12 POS interface module designed for Cisco networking equipment. It is listed as the 4OC12E POS-IR-SC-B model and provides 4 OC12 POS ports with Single Mode SC fiber connectors. The part number 800-05491-05 and the model designation 4OC12E POS-IR-SC-B serve as verified identifiers for this OC12 POS interface card, intended for configurations that require multiple OC12 POS links. With four ports, this card enables aggregating POS capacity across separate OC12 paths within compatible Cisco platforms.
