Called FiOS about my weird problem with 10-15% packet loss only in the upstream direction.  The person on the phone was able to do some kind of test remotely to identify (without me saying it first) that yes, the problem was on the wired link, in the uplink direction, and that it was a problem that they know about and can probably fix without a truck roll.  So I guess FiOS has some diagnostic tools too.

Of course, then I thought, if they know about and can diagnose this problem remotely, why didn't they just do that and fix it for me in the first place?

But then I thought, well, we don't either.