Adding a tip for VoIP: If you use WAN- bypass on a VoIP/ router such as the Netgear WGR613V, there is an extra step to get voip working. Netgear cg814wg v2 manual download.
You must add static routes to your gateway for the VoIP server protocols , DNS so the ATA is not trying to use your disconnected WAN port. View and Download NETGEAR CG3100 user manual online.
Animated guides are available for Netgear and Sagemc.