System details: Digium Wildcard TDM410P with three extensions and one POTS line. Dual core Pentium 4 (32-bit) processor Fedora 18 Asterisk 11.2.1 DAHDI Version: 2.6.2 Echo Canceller: HWEC I recently upgraded from Asterisk 1.4, and made as few changes to the configuration files as possible. I regenerated the dahdi-channels.conf file, then I believe I had to edit this to set the contexts correctly to match the rest of my dialplan. The dialplan does seem to be working as before. The problem is that, every few days, my POTS line gets stuck. The other ports are working for intercom, but attempts to place outbound calls through the POTS line, whether from a SIP phone or one of the DAHDI extensions, get a fast busy, and this appears in the Asterisk log: [Apr 5 21:29:35] WARNING[8191][C-0000003e] sig_analog.c: Ring/Off-hook in strange state 6 on channel 4 I have to restart asterisk and/or dahdi to get it working again. Can someone tell me what this message means and suggest how I might prevent this from happening? Is my hardware flaky, or is there something I need to update in my configuration? Thank you, --Greg