In-stock optical core router QSFP-DD

QSFP-DD modules are high-density, pluggable optical transceivers supporting 400G and 800G speeds, designed for direct integration into core routers and DWDM networks.Overview of QSFP-DDQSFP-DD (Quad Small Form Factor Pluggable Double Density) is an evolution of the QSFP family, doubling lane density to support 400G and 800G data rates while maintaining backward compatibility with QSFP28 and QSFP56 cages . Each module uses 8 high-speed electrical lanes, typically supporting 50G PAM4 signaling, enabling cloud-scale, AI-driven, and carrier-grade infrastructure in a compact form factor . QSFP-DD modules are widely used in data centers, metro, and core network deployments due to their high port density and interoperability.Types of QSFP-DD Modules400G QSFP-DDShort-Reach (SR8): Ideal for in-rack or cross-row connections, priced around $1,400–$1,800 from third-party vendors .Digital Coherent Optics (DCO): Supports OIF 400ZR and OpenZR+ standards, enabling direct plug-in to routers without intermediate transponders. Standard transmit power is typically –10 dBm, suitable for shorter DWDM links but may require amplification for ROADM networks .DR4/FR4: Bridge data center rows or campus links, offering intermediate reach between SR8 and coherent modules .800G QSFP-DDHigh-Power DCO: Supports OIF 800ZR, multi-rate coherent transmission (400G, 600G, 800G), and long-haul metro/regional networks. High transmitter output (0 dBm) ensures compatibility with ROADM line systems and direct router integration .Integration with Core RoutersCisco QSFP-DD OLS modules can be directly hosted on Cisco routers, providing a pluggable optical amplifier solution for DWDM networks .Routed Optical Networking (RON) architecture allows router-to-router optical connections, reducing the need for separate transponders and simplifying network operations .Coherent QSFP-DD modules enable IP-over-DWDM, reducing capital and operational expenditures by minimizing intermediate equipment, power consumption, and cooling requirements .Pricing and Procurement ConsiderationsQSFP-DD pricing varies widely: SR8 modules are the most economical, while coherent ZR+ modules can exceed $130,000 from OEMs .Third-party vendors offer cost-effective alternatives for short-reach and some coherent modules, but buyers must consider compatibility, support, and TCO .Volume discounts and module selection based on transmission distance and network architecture are critical for cost optimization .Key TakeawaysQSFP-DD modules provide high-density, high-speed optical connectivity for modern core routers and data center networks.Selection depends on distance, network topology, and budget, ranging from short-reach SR8 to long-haul 800G coherent modules.Direct router integration with coherent QSFP-DD modules reduces network complexity and operational costs, especially in DWDM and ROADM environments .