IP Base for 3750 E (the default license) GLC-BX-D= 1000BASE-BX SFP, 1490NM GLC-BX-U= 1000BASE-BX SFP, 1310NM GLC-GE-100FX= 100BASE-FX SFP for GE SFP port on . GLC-T= 1000BASE-T SFP CWDM-SFP-1470= CWDM 1470 NM SFP Gigabit Ethernet and 1G/2G FC CWDM-SFP-1490= CWDM 1490 NM SFP Gigabit Ethernet and 1G/2G FC CWDM-SFP-1510= CWDM 1510 NM SFP Gigabit Ethernet and 1G/2G FC CWDM-SFP-1530= CWDM 1530 NM SFP Gigabit Ethernet and 1G/2G FC CWDM-SFP-1550= CWDM 1550 NM SFP Gigabit Ethernet and 1G/2G FC CWDM-SFP-1570= CWDM 1570 NM SFP Gigabit Ethernet and 1G/2G FC CWDM-SFP-1590= CWDM 1590 NM SFP Gigabit Ethernet and 1G/2G FC CWDM-SFP-1610= CWDM 1610 NM SFP Gigabit Ethernet and 1G/2G FC DWDM-SFP-3033= DWDM SFP 1530.33 nm SFP (100 GHz ITU grid) DWDM-SFP-3425= DWDM SFP 1534.25 nm SFP (100 GHz ITU grid) DWDM-SFP-3582= DWDM SFP 1535.82 nm SFP (100 GHz ITU grid) DWDM-SFP-3661= DWDM SFP 1536.61 nm SFP (100 GHz ITU grid) DWDM-SFP-3819= DWDM SFP 1538.19 nm SFP (100 GHz ITU grid) DWDM-SFP-4214= DWDM SFP 1542.14 nm SFP (100 GHz ITU grid) X2-10GB-ER= 10GBASE-ER X2 Module X2-10GB-LR= 10GBASE-LR X2 Module X2-10GB-LRM= 10GBASE-LRM X2 Module X2-10GB-SR= 10GBASE-SR X2 Module X2-10GB-CX4= 10GBASE-CX4 X2 Module