Cisco Transceiver Module - XFP transceiver module - SONET/SDH/ 10 GigE - 10GBase-LR - LC single-mode - up to 6.2 miles - OC-192/STM-64 - 1310 nm - refurbished - for P/N: A900-IMA2Z-RF/ A900-IMA2Z-WS/ A9K-8T/4-B-RF/ A9K-8T/4-B-WS/ ASR1000-6TGE-RF