Last year, Alan Masarek made news as he left Google to become Vonage’s new CEO.
Besides reading the best books you can find about marketing, sales and telecom in general, I would also highly recommend keeping up with the latest industry news.
You may also want to subscribe to some of the industry's leading magazines, such as America's Network or Phone+. You should also seek the advice of a qualified accountant or certified financial planner for the best way to set up your business. If you have other friends that run successful businesses, you may want to get their advice as well. Local libraries and bookstores are full of titles on how to start-up your own business. Look for titles that provide information specific to your state or county, if available.
Your last step should be to find a quality vendor. This would be either a master agency, carrier or reseller.