Calls quit working until reboot. Happened twice in 5 days

[Fraser]

Have a look at this:

PJSIP drop all registrations and became unreachable

Hi, I had this exact same problem with PJSIP and it is related to this Asterisk bug: https://issues.asterisk.org/jira/browse/ASTERISK-27821 Changing all PJSIP extension’s MWI Subscription Type from Auto to Solicited solves the problem. Fraser.