Hal,
When condition is present, unplugging the line cord will give me good dial tone on the plug, while line button still shows red (in-use), re-plugging good dial tone does not give dial tone to button, and lite is still "frozen" red.
Re-booting clears "frozen" line and all is good again.
Carrier is Verizon FIOS, but also happens on ACS 6.0 with Optimum /Cablevision. Trouble is not consistent and happens on different lines. I have tried swapping out the forwarding set, a Euro 18d). Techroy.
