Verizon PSTN continued

The thread yesterday didn't seem to get into much detail; I'm wondering if anyone knows more about what is going on with Verizon? Our PSTN service with XO seems to be affected again by what XO claims is a Verizon problem but they wouldn't elaborate on why they feel that to be the case; I was just amazed to even get someone on the phone at XO since normally they are unreachable. I am inclined to partially believe them since I've found other numbers that I know to be with other carriers that are not working. XO claimed this was at least a regional issue of Verizon's that is affecting multiple carriers. David