Can't call extensions after instaling firmware for 6204


After installing firmware on my ucm6204 I can’t call any extensions in house. when I try I get busy sound and says something about can’t connect. I can call out from any extension and receive calls from outside, just can’t call others extension in house. Anyone had this problem yet?


We had a heap of issues at one of our sites, ended up the firmware got corrupted during upload and we spend days trying to get things working, in the end simply downgraded the firm to 1.0.18 than upgraded again and everything was sorted.



Thanks SWC I will try that tomorrrow morning. Thank you for all your help I will let you know how it works out.