5031 and DMZPlus
Just a quick note to anyone else trying to use the DMZPlus feature in the 5031NV RG. The feature apparently interferes with VOIP connections.
Symptoms were that I could place a call, but couldn't hear anything most of the time. Some numbers (consistently) worked fine, most didn't. In at least some cases, the other end could hear me, but I couldn't hear them (I never even heard the ring).
Receiving calls appeared to always work (with one possible exception, but that was while some other issues were going on).
It also seemed to interfere with the VOIP lines registering. I was able to manually reset them, and then they registered just fine, but doing a power-cycle, the Internet connection was working fine, but the phone lines were showing as inactive. Not positive that was related, I only did it once.
I see that this issue has been reported, but apparently isn't widely known in tech support. Not knowing this and/or not fixing this is costing AT&T money trying to resolve voice issues when it's a firmware issue in the RG.