Thanks guys...

At first, couldn't replicate the issue. When arriving onsite when the issue 'just happened', plugging directly into the MTA wouldn't result in dropped calls. It would of course start happening right after I left. Spectrum didn't see any issues on the line.

Finally had it happen while onsite while on my butt set. Got Spectrum to send a tech out ... and they couldn't find anything (logs look normal, etc., etc., etc.).

Fun.

- J