The first AT&T tech who was dispatched made no changes and could not detect a failure. The second replaced our ONT, which changed nothing. The third tech was dispatched today, re-did our sloppy splice and dramatically improved SNR (measured from both AT&T and his optimeter). We were really hopeful--but then about half an hour ago we saw this same issue yet again.
Sonic's support has been really great through all of this, and I understand that Sonic has little control operationally over Fusion service, but this is not workable for us. Support is aware and this is being escalated to AT&T but I wanted to ask on here if others with Fusion service have experienced this and what the cause was. Happy to provide troubleshooting info (Nokia XS-020X-A ONT, Arris BGW210 gateway); we really don't want to leave Sonic, we just want to fix this. I don't know what protocol negotiations are being done but my gut says it's a session timeout given the consistent brief windows.
Thanks for any advice -- Will
P.S. Just happened again, bringing us up to five outages for the day. It seems like the frequency may be increasing and we might just get "lucky" enough to have a persistent failure before we get this fixed.