GTI provides leading edge telesales and teleservices to a growing list of industries. Our customer centric management team an ... d state of the art integrated hardware and software solutions allow GTI to provide superior performance for your business, and more importantly, your customers. With a core competency in third party verification (TPV), both Live and IVR units, GTI has been providing third-party-verification services for major energy, telecommunication, and insurance companies for two decades. read more