I used to work for a Fortune 100 software and hardware distributor that also has one of the highest revenue-generating sites on the Internet. We ran a all of our call routing and control services on Unix (can't remember if it was Solaris or HP-UX for those servers). BUT we then transferred all the post-event descriptive information to an MS SQL Server to do data mining against the data. Some people might have thought that MS software ran the whole show, since most managers would use the SQL app to see how their sales teams were doing, but the whole thing was in fact fed by Unix.
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For us it was a balance of Windows and Unix.
I used to work for a Fortune 100 software and hardware distributor that also has one of the highest revenue-generating sites on the Internet. We ran a all of our call routing and control services on Unix (can't remember if it was Solaris or HP-UX for those servers). BUT we then transferred all the post-event descriptive information to an MS SQL Server to do data mining against the data. Some people might have thought that MS software ran the whole show, since most managers would use the SQL app to see how their sales teams were doing, but the whole thing was in fact fed by Unix.