Part 1 - The Cause

More and more people are getting VOIP Service like T-Mobile @ Home and are running into issues when are attempting to use a VPN (Virtual Private Network) to connect to their work.

A lot of people don't realize, but many VOIP Services use VPN Protocals to connect you to their service.

The symptoms include:
1. Repeated Lost Connections to their work
2. Lost Connections and Connection Errors with their VOIP Provider
3. Slowed Internet Connection while both VPNs are connected.

The confusing thing for many, you can still connect both VOIP and the VPN at the same time intermittently, but this is short lived and you will loose your connection.

The cause of your issues, if you don't know by now, you can't have more than one VPN behind a NAT (Network Address Translation) gateway or firewall.