MOVED POST BY MOD => PLEASE POST NEW TOPIC
I have a SE-220 and use it for 3-5 calls per day. It's worked fine for the last few years but three weeks ago I too, have just started getting line disconnects. Same wire, same connection (only line 1).
Mine acts like a power surge hits it. I can dial, it will ring and then the phone disconnects and then reconnects quickly.. Switching the wall wire from line 1 to line 2 is no improvment either. I'm not able to send DTMF tones after connecting on either line.
Conditions still the same after performing master reset and reboot.
Is there a firmware update that I can try?
I don't mean to hijack your thread.
Have you tried pluging a known-working analog phone into that line(s) to see if you get the same, or similar behavior?