My OBi200 was working just fine all day until a few minutes ago. I cannot receive incoming calls. When I try to dial out I get a message stating "The number you dialed XXXXX was rejected by the provider reason 503. This issue is only occurring on SP1, which is a Google Voice number. I can dial out & receive calls on Sp2, Sp3 and Sp4 (Sp2 & Sp3 are Google Voice numbers & Sp4 is Callcentric). I went into the Obitalk dashboard and deleted my Sp1 and reconfigured it. Still no dice. The Google Voice number associated with Sp1 is working because I can take calls through Hangouts on my tablet. Any ideas as what I might do to remedy this issue? You are all so helpful & knowledgeable on this forum.