Our office uses cable internet - bandwidth is 200 mbps download and 20 mbps upload. We are thinking of adding VOIP to our network - currently we use POTS lines. We will have approximately 6-8 phone lines. How much of an impact will that have on our users internet speed, which is a high priority since many of our users access all their files from a remote server (box.com). If it's going to slow down the internet noticeably, I don't want to do it. We will be using Cat 5e for network cable.