Features, features and features! With analog phone lines, you're stuck with a very small list of features (call waiting, call forwarding and voicemail). VoIP, on the other hand, delivers much better sound quality. Another advantage is security, as digital uses encryption during transmission - thus blocking other parties from listening to calls. The list of features VoIP brings to the table is daunting compared to analog, including Fax to E-mail, voicemail to E-mail, remote call forwarding, conferencing, advanced call routing, voicemail greetings, auto-attendants and much, much more!