Yes, I should say most of the clients are using Comcast, Time Warner, Cox and Charter Cable. Most of those are using Comcast, but all are using some form of Cable, except for one client who has Verizon FiOS.

I have Comcast, and yesterday, one of my clients could not call me from her cell phone. She got various messages over a 30 minute period, before finally getting through.

I was using the north reseller server at the time, and no other issues that I was aware of.