Cisco CWDM 1530-nm SFPThe Cisco CWDM 1530 nm SFP is a high value, scalable solution designed for enterprises and service providers who need to extend Gigabit Ethernet across distributed sites with minimal fiber strands and simplified deployment. Built on coarse wavelength division multiplexing (CWDM) technology, this miniature, hot swappable transceiver fits into standard SFP ports on Cisco switches and routers, enabling flexible, cost efficient, and future ready layer 1