Keep Gigabit Ethernet links running across CWDM optical infrastructure with a TAA-compliant SFP transceiver built for Avaya/Nortel AA1419064-E6 compatibility. This AddOn module is intended for environments that need a direct replacement for 1000BASE-CWDM deployments while preserving the installed fiber plant and the operational model already in place. CWDM optics are often chosen when distance, fiber availability, and port density all matter. This transceiver fits that use case by maintaining a compact SFP footprint while supporting the optical characteristics expected in enterprise aggregation and metro-edge designs. For teams managing mixed-vendor networks, it offers a practical way to replace a failed module without forcing a broader refresh. TAA compliance adds procurement clarity for regulated organizations. That matters when the goal is not just technical compatibility, but also a clean purchasing path for government, education, healthcare, and other controlled environments. When uptime, sourcing, and infrastructure continuity all carry weight, this module gives you a focused replacement option that fits the job.