X2-10GB-LR 10GBASE-LR X2 transceiver module, SMF 1310nm $980
X2-10GB-SR 10GBASE-SR X2 transceiver module, MMF 850nm
X2-10GB-ER 10GBASE-ER X2 transceiver module, SMF 1550nm
XFP-10GLR-OC192SR Cisco multirate XFP transceiver module 850NM 2KM
XFP-10GZR-OC192LR Cisco multirate XFP transceiver module 1310NM 15KM
XFP-10GZR-OC192ER Cisco multirate XFP transceiver module 1550NM 40KM
XENPAK-10GB-LR 10GBASE-LR XENPAK transceiver module,SMF,1310NM 15KM
XENPAK-10GB-SR 10GBASE-SR XENPAK transceiver module, MMF,850NM 2KM
XENPAK-10GB-ER 10GBASE-ER XENPAK transceiver module, SMF,1550nm