Would be great to be able to initiate a speed test on a clients machine to see if there is a speed issue.

Open client machine. initiate speed test to speedtest.net and see the results in the phone for the test fom the client machine.

If the speed is below an expected level it could generate an alarm....

I know that Ookla allows you to create your own speedtest using a stand alone app which you install on a server and it uses .net.

http://www.speedtest.net/mini.php

This can be similar. Remember that speedtest requires flash player so an automatization is out of the discussion, however you can calculate the latency in other ways too.

Similar Thread.

This might be an option. It has command line functionality. FTP also.... so you can test against multiple sources....

http://www.nirsoft.net/utils/download_speed_tester.html