What is the purpose for this change? "buisness internet and phone" doesn't mean anything.
If you need more bandwidth, you can get cable up to 25mbit, which should be plenty of bandwidth for any buisness you're running at home (short of a datacentre, isp, etc).
For phone service, a buisness may need additional lines. Even if it didn't, i'd probably still go with voip, but choose a service provider you know you'll have a fast/reliable link to.