Hi everyone, I have a new client with a problem that is driving me absolutely insane!. This is my third client on a Multi-Tenant installation. Basically, I have 4 Yealink phones, updated with the latest firmware, and every 2 hours - 1day, the registration just drops. The ONLY way to get them to register back up is to do a factory reset on the phone, and re-provision them. I am using STUN mode not SIP Proxy manager Its a very basic setup that is driving me insane, the event log in 3cx is suggesting nothing. When it does work, it works fine.