Cisco - XENPAK transceiver module - 10 GigE - 10GBase-LW - SC/PC single-mode - up to 6.2 miles - 1310 nm - refurbished - for P/N: WS-SUP32-10GE-3B/ WS-SUP32-10GE-3B=/ WS-SUP32-10GE-3B-RF/ WS-X6704-10GE-RF