You need to recognize how many users you need to set up at your office.nThe internet connection has to be fast and should work at all times.nThe VOIP services are vast, and for each service, the VOIP service providers charge accordingly. Make a list of your needs and then set a budget and choose the plan and services that suit you best.nVOIP needs a new phone, so set up a new phone.nFinally, the VOIP phone is set, and then you can use it.