The Cisco 1-Port OC-192 POS/RPR SPA is available on high-end Cisco routing platforms, offering the benefits of network scalability with lower initial costs and easy upgrades. The Cisco SPA/SIP portfolio continues Cisco's focus on investment protection along with consistent feature support, broad interface availability, and the latest technology. The Cisco SPA/SIP portfolio allows different interfaces (packet over SONET/SDH [POS], ATM, Ethernet, etc.) to be deployed on the same interface processor.

The Cisco 1-Port OC-192 POS/RPR SPA provides 10-Gbps Small Form-Factor Pluggable (XFP) interfaces in addition to fixed interfaces. SPA configurations are available to support multiple optical reaches from 300 meters to 80 kilometers.

Applications
The Cisco 1-Port OC-192 POS/RPR SPA can be used in multiple applications, including:
- Access and aggregation
- WAN uplinks
- Internet peering

The Cisco 1-Port OC-192 POS/RPR SPA features both POS for mesh fiber networks (Figure 2) and Resilient Packet Ring (RPR) for ring fiber topologies (Figure 3). This SPA complies with the IEEE 802.17 RPR standard and also supports the Spatial Reuse Protocol (SRP) for compatibility with existing Dynamic Packet Transport (DPT)/RPR networks.