AddOn - SFP (mini-GBIC) transceiver module - GigE - 1000Base-BX-U - LC single-mode - up to 6.2 miles - 1310 (TX) / 1490 (RX) nm - TAA Compliant - for Dell Networking S3124/ S3148/ Dell EMC Networking N2128/ N3024/ N3048/ N3132/ X1026/ X1052