Supported Memory Configurations on Netra T2000

I need to upgrade the memory configuration on our T2000s to 24 Gb. I presently have 8x2Gb DIMMS in Rank 0 and 8x1Gb DIMMS in Rank 1, but the OS only recognizes 16Gb. How can I upgrade these T2000s to 24Gb?

this is info from the "system hanbook"

this said, you can have 16x the dimms you use... which is 8gb, 16gb, 32gb or 64gb. there is no way (from what i can see) to get a 24gb configuration.

Thank You for your response, I am upgrading to 32Gb this afternoon.