ca3le may be able to set up a remote host for you. Meaning the test files would be located on your server, and you would take the test via remote link from your pc -> server, then results would be displayed here on testmy for you to see. That would setup a "speed test" to see what your server is capable of... but if your refering to your pc -> server's responce time to "initiate" the download , all youd have to do is ping the server, thus giving you a ms (millisecond) time to your server.
If neither one of thoes are what your talking about then *shrugs* iunno.