Ciena 170-3931-900 CN3900 Service Delivery Switch

The Ciena 170-3931-900 CN3900 Service Delivery Switch is a CN3900-series network device designed to terminate and forward carrier-grade services at the network edge. Built on Ciena's SAOS (Service-Aware Operating System), it provides service-aware routing and switching functionality to support SLA-driven Ethernet services, with management and monitoring capabilities common to Ciena's service delivery family. The 170-3931-900 model represents a hardware variant within the CN3900 platform, commonly deployed in telecom and enterprise environments seeking reliable demarcation, quick service turn-up, and scalable throughput as part of an integrated service delivery solution. As with other CN3900 devices, the CN3900 Service Delivery Switch family is designed to work with Ciena's broader SAOS-based portfolio to enable consistent policy, QoS, and diagnostics across edge-to-core networks. This specific CN3900 switch is identified by its 170-3931-900 part number, confirming its place in Ciena's long-running line of service delivery hardware.