No, not if your situation makes traditional phone lines the better option.
Phone calls over the Internet are a good option IF your office location has good, reliable Internet service. Also, if your internal network is not configured for Internet phone service, your experience will be regrettable. NHT's staff call over the Internet daily, and it works for us because we are located in downtown Kalispell, and we use solid network equipment. However, if you are located in an area where the technical infrastructure is not so reliable, using traditional phone lines may be your better option.
Our systems can use both traditional phone lines and Internet phone service without a problem. Please contact us to learn of our customers who use both traditional phone lines and Internet phone lines, and they can't tell the difference.