Tried talking the customer into upgrading, but if they do then they won't be able to network this site to their other locations, as all are running on 406's. Beings I have a 406 lying around, he agreed to buy it off me and I'd install it. Next budget cycle, they are going to plan to replace all their 406's with 500v2 units. Basically this is just to get them going.

BTW, pretty sure the DS card isn't changeable on the 406. Isn't it just integrated into the chassis?