Re: i have my own website of tech support. how can i get inbound calls
Tech Support is a sensitive business type to advertise with AdWords. It has been discussed several times here. The reason is obvious, advertisers advertising such businesses are more prone to violate AdWords policies which become the reason for their account suspension. I would advise you to search this community with 'technical support' as keyword, read a few threads to see if they are helpful to you.
All the best!