Summary: As a router and modem the 7404vnpx is neat and works well. But the voip feature is barely acceptable. It is not unit specific either after having a few of these units they all tested the same and could not be configured to a good quality voip line. At best the volume was low. but usually we'd have to wait until a total loss of comunication passed which could last 20 seconds. These units allways ran the latest firmware but the problem has allways persisted.