For UCM6301. Firmware version 184.108.40.206
While battle inbound route, I upgrade the PBX to the last version.
Now, inbound calls working, but all outbound got rejected.
So, I whitelist all extensions, still no luck.
had to change privilege level from “national”(all extensions are at national level ) down to local. outbound back to working again.
Fun system to work with…