i don`t see UniServer product anywhere, seems its name now: eSignalPlugin for TS2000i.
OnDemand and eSignalPlugin for TS2000i seem to look similar, but their work differs fundamentally. When you're using OnDemand, your GlobalServer is practically idle and the chart is based on data directly from the Internet. I.e. with OnDemand TradeStation 2000i works like TradeStation 6, just receiving data from eSignal. As to eSignalPlugin for TS2000i, this is a replacement for HistoryBank because it allows to download history data from eSignal directly into the GlobalServer. eSignalPlugin for TS2000i downloads data into the GlobalServer
and OnDemand Server doesn't work with GlobalServer at all.