The client has a NSA220 (SonicOS Enhanced 5.9.1.0-22o) and is pretty much set up with defaults albiet a few NATs for a handful of typical servers, very basic stuff, and two dozen workstations. The ISP is cablemodem with 100M down and 15M up.
We added about a dozen Avaya handsets to use Ringcentral's "cloud" Voip service. We tried using them without adding any settings to the SonicOS, but of course resulted in your typical Voip problems.
We applied Ringcentral's recommended SonicOS settings:
http://success.ringcentral.com/articles/RC_Knowledge_Article/7773
After we did this, the phones work fine, but at the cost of our internet. We're getting terrible ping times, a sharp decrease in bandwidth.
I believe the Ringcentral settings may have been for an older SonicOS, what modifications to Ringcentral's workflow could be done to make things "better"? I am hoping that someone with experience can see what they did and say "Why on earth did they do that?".