Update: This issue is back again and not sure why or what else to do. All ports that I have been asked to forward are forwarded, and apparently, we are still on stun, but the "no audio" business is back when calling a certain number. It is a Linksys pap2t on this end behind a Linksys wrt310n running ddwrt, and a GrandStream on the other end also behind a router, but can't recall brand and model. Note that I have qos enabled via the mac address of the pap2t, but I don't think that should interfear.

RA