I have a Freepbx version 16.0.40.11 Asterisk version 18.20.0. It has about 280 yealink phones, all setup as pjsip. Intermittantly the phones (not all) will drop off and reregister. After that a call that is for one of the phones that went offline will be routed to a different phone. The original phone is able to place a call but not recieve a call. The really interesting part is that if there is a Clearly Anywhere app paired with this phone the app will get the incoming call. the desk phone does not react at all to an incoming call. After some indeterminate time the deskphone will start to work again. This issue is totally random throughout the system. We have been unable to catch this in a pcap. CDR shows the call as normal. Has anyone seen anything like this. The AOR appears normal as well.
Thanks