In the last few days I have noticed, on one Portal only, an intermittent blocking of some characters.
I first noticed in on yellow 4s. That sees to have resolved itself, at least for now.
The other is the os on some messages, like Recording confirmed.
It is the only Portal which shares an upstream one-in/two-out splitter with a DCX3400 (on a temporary basis). This setup worked fine for almost a month before this little glitch showed up.