Compatibility | Cisco Networking Products:3800 Series Integrated Services Router - NM-1A-OC3-POM; Port Adapter (PAs) - PA-POS-1OC3; Shared Port Adapter (SPA) - SPA-1XOC3-ATM-V2; Shared Port Adapter (SPA) - SPA-2XOC3-ATM; Shared Port Adapter (SPA) - SPA-2XOC3-POS; Shared Port Adapter (SPA) - SPA-3XOC3-ATM-V2; Shared Port Adapter (SPA) - SPA-4XOC3-ATM; Shared Port Adapter (SPA) - SPA-4XOC3-POS; Shared Port Adapter (SPA) - SPA-4XOC3-POS-V2; Shared Port Adapter (SPA) - SPA-8XOC3-POS |