To me the biggest problem with Google - whether Voice or any other product - is the inability to communicate directly with Google. In this situation, Steve volunteered to get a Google contact involved, and that contact did in fact talk to CallCentric. They agreed that Jake at GV would go do some research and report back, this was on October 27th. Per CallCentric, Jake agreed to provide test and the trace information between their underlying carrier and CallCentric explaining why the calls are not reaching Telengy numbers. That never happened. CallCentric has tried to call Jake several times to follow up, Jake apparently does not have voicemail that kicks in (per CC), and they have not spoken since.
I have repeatedly tested my lines, including a FREE Dirt Cheap DID that CallCentric provided me to do testing. GV forwarding to the Free DIDs never goes through promptly, often doesn't ring the phone at all or does 1 ring before going to GV voicemail. Testing with the Dirt Cheap DID sometimes gets a ring within a few seconds, sometimes it takes multiple rings, sometimes it doesn't ring and goes to GV voicemail. Forwarding to IPComms and then CC results in immediate rings.
CallCentric's perspective, which I 100% buy into after this period of exploration, is that GV has systems in place to route the calls in the least expensive way possible, and that results in this performance problem. CallCentric says that GV has fixed this before, and then it reverts back when someone sees the increased cost incurred, and that they appear to take no steps to prevent it from reverting back. Since it's been this way for two months or so, I believe this assessment.
CallCentric has been very helpful in this exploration, I've never spoken to GV, just communicated to Steve who then communicates to them. I've provided call logs, Steve has verified that they have been sent to GV. I've explained the problem, and Steve's latest response on the GV forum is that he's done, they're done, the problem is only with Free DIDs (which it is not).
Perhaps if they directly contacted me directly and I could show them the problem, they could see the issue and resolve it. If they cared, which again it appears they do not.
I can say that I'm done going indirectly to GV. If they want to contact me they can easily do so via the GV forum, they also have my phone number in their call logs so they could call me. I've asked him to do so.
Until that happens, forwarding from GV to CC which worked fine for me for many months (May to September) is now not an option, and I'll be examining porting my numbers out of GV if no resolution is forth coming. Too bad, it was a nice service, but it too unreliable to use going forward unless something changes.
Also, this is not just a GV to CC issue. Without knowing the magnitude of the problem, it is easy to surmise potentially anyone calling a Telengy number with their GV line would experience very delayed ringing on the other end, which the caller would only notice if when the person picks up they say "hey, it rang 9 times" and the person on the other end said "nope, rang twice".
I believe that GV either lacks the technology to monitor their network effectively, or doesn't look at the monitoring information, or looks at the major issues and not all the issues, or is governed by keeping costs as low as possible. I endeavored to, and will continue to try to be the squeaky wheel.