Thank you for your assistance!!
I was able to get the 5312 to work off of the 3300icp via VPN. My QoS is fine. I can make calls to and from the 3300's site with no problem.
Next issue: Our Internet / VPN connection is at our corporate office. We have 5 manufacturing locations across the United States. Each having a 3300ICP that is networked. I have configured a SonicWall firewall at my house to mimic the configuration our offsite warehouse (IP addressing was changed).
I have the 5312 registered to the 3300ICP in plant A. I can call Plant A extensions and they can call me. Again, the QoS is close to perfect. I can call our Corporate extensions and they can call my remote extension (again corporate is the Internet / VPN site).
If I call Plant B, Plant C, Plant D, or Plant E....I can make the call, but the phone drops when they pick up. They can not hear me. The users in those locations can call me, I see their name and number, but I can not hear them.
Any ideas / suggestions? The only configuration I have not made is adding the Plant B, C, D or E's subnets to the firewall / routing tables. I will try that next. (Thanks...I may have thought it through typing this!!!)