Cisco 2811 Series DRAM Memory Options

Part Number	Description
MEM2811-256U768D	256 to 768MB DDR DRAM factory upgrade for the Cisco 2811
MEM2821-512U1024D	512 to 1024MB DDR DRAM factory upgrade for Cisco 2821
MEM2851-512U1024D	512 to 1024MB DRAM factory upgrade for 2851
MEM2811-512U768D	512 to 768MB DDR DRAM factory upgrade for the Cisco 2811
MEM2821-512U768D	512 to 768MB DDR DRAM factory upgrade for the Cisco 2821
MEM2851-512U768D	512 to 768MB DDR DRAM factory upgrade for the Cisco 2851
MEM2811-512D=	512MB DIMM DDR DRAM for the Cisco 2811
MEM2811-512D	512MB DIMM DDR DRAM for the Cisco 2811