The OC12 POS line cards provide the Cisco 7304 router with single or dual 622.080-Mbps POS interfaces on a single card.PRODUCT FEATURES:Online insertion and removal (OIR) in the Cisco 7304 router, allowing you to remove, add, or replace an OC12 POS line card online;Support for 16-bit and 32-bit cyclic redundancy checking (CRC-16 and CRC-32);Support for Synchronous Payload Envelope (SPE) scrambling;Supports HDLC encapsulation.