XO / Level 3 connectivity issues?

[Patrick Giagnocavo <patrick () zill net>]

Is anyone aware of problems between XO and Level3?

I have a VOIP provider telling me that there are problems in Chicago  
that are affecting VOIP call quality when the IP phone endpoint is on  
XO and the provider's  VOIP switch is on Level3 (symptoms are choppy  
voice quality with remote caller's voice being garbled or blenderized).

--Patrick