This started happening to me recently. The house line will ring once on an incoming call, and then just hang up for no reason. It happens maybe 1 out of 10 calls. Here is what the CLI captures during a call that gets hung up on. Any ideas?
-- Executing [s@menu:3] Ringing("SIP/16785551234-081ce4c8", "") in new stack
-- Executing [s@menu:4] WaitExten("SIP/16785551234-081ce4c8", "") in new stack
[Feb 1 10:20:03] WARNING[4222]: chan_sip.c:1881 retrans_pkt: Maximum retries exceeded on transmission 2e1785c2092791ae70c30d232515ae43@64.118.82.164 for seqno 102 (Critical Response)
[Feb 1 10:20:03] WARNING[4222]: chan_sip.c:1898 retrans_pkt: Hanging up call 2e1785c2092791ae70c30d232515ae43@64.118.82.164 - no reply to our critical packet.
== Spawn extension (menu, s, 4) exited non-zero on ‘SIP/16785551234-081ce4c8’
[Feb 1 10:20:03] WARNING[4222]: chan_sip.c:1881 retrans_pkt: Maximum retries exceeded on transmission 2e1785c2092791ae70c30d232515ae43@64.118.82.164 for seqno 102 (Critical Response)
[Feb 1 10:20:04] WARNING[4222]: chan_sip.c:1881 retrans_pkt: Maximum retries exceeded on transmission 2e1785c2092791ae70c30d232515ae43@64.118.82.164 for seqno 102 (Critical Response)
asterisk*CLI>