Cisco - EDO RAM - 256 MB: 2 x 128 MB - DIMM 168-pin - 3.3 V - ECC - refurbished - for P/N: 12DS3-SMB-RF/ 6DS3-SMB-RF/ 8FE-FX-SC-RF/ 8FE-TX-RJ45-RF/ LC-OC12-DS3-RF