Please suggest somefor tech support lead you need to find out some troubleshoot related forum for computer and webserver related.
Hey mate, could you share some resources for such PPC calls please. I will really appreciate it.Go with PPC
First you need to create a good landling page with your US TFN displayed in prominent positions because you need to work on calls.
PPC on adwords and Bing Ads are one of the best ways to generate quality tech support leads.
There are some traffic networks as well which you can use like leadimpact, junkyads etc to drive targetted traffic to your Landing page and convert the traffic into calls by using a good landing page.
To dicuss in detail you can skype me on: gurneet13