Cisco Transceiver Module – XFP transceiver module – SONET/SDH, 10 GigE – 10GBase-LR – LC single-mode – up to 10 km – OC-192/STM-64 – 1310 nm – refurbished – for P/N: A9K-2T20GE-E-WS, A9K-8T/4-B-RF, A9K-8T/4-B-WS, A9K-8T/4-E-RF, ASR1000-6TGE-RF