Reach: 10km (6.2 miles) Fiber/Cable Type: Single-Mode Fiber (SMF) Wavelength: TX 1310nm / RX 1490nm Temperature: Commercial Third Party; 100% Compatible GLC-BX-U-PCW is a 1000BASE-BX-U Bi-Directional SFP Transceiver, generic for Cisco GLC-BX-U. It is guaranteed compatible for all Cisco switch and router product lines. This transceiver can be mixed and deployed with Cisco OEM transceivers for seamless network performance and interoperability. PC Wholesale offers a LIFETIME advance replacement warranty on all transceivers (compared to 90 days from most OEM manufacturers).