We are currently running a definity G3SI switch with version 6.1. I'd like to upgrade the system to version 9 so I could use DSA. I just got back from training last week and all we used was DSA. Now I got back and found out we only have a SAT terminal. I'd like to know if anyone knows what the average cost is for the upgrade and what it costs for a maintenance contract with the upgrades built in. Plus are there any other real benefits to upgrading to the new version. I have to have some supporting material to suggest that we actually need the upgrade other than my ease of administration ploy.