Cisco 2-Port OC-3/STM-1 POS Port Adapter (Spare) 155.52Mbit/s networking card

2-Port OC-3/STM-1 POS Port Adapter (Spare) To meet the continual need for increased router features and performance, Cisco Systems® introduces its newest packet-over-SONET (POS) port adapter, the Cisco® 2-Port OC-3/STM-1 POS Port Adapter. The 2-Port OC-3/STM-1 POS Port Adapter is ideal for service providers or large enterprises that need to deploy multiple ports of OC-3/STM-1 connectivity or a single OC-3/STM-1 port with redundancy and failover support.
The 2-Port OC-3/STM-1 POS Port Adapter combines superior performance and an innovative design to provide the following benefits:
-Dual-port, line-rate performance.
-Automatic protection switching (APS) failover between ports.
-Modular, pluggable optics (Three types are available: multimode fiber, short range [MM]; single-mode fiber, intermediate range [SMIR]; and single-mode fiber, long range [SMLR]).