I have encountered an annoying "problem" with my new 3CX 12 SP6 installation. Over the Christmas holiday we replaced the company's old PBX with this and 40 Cisco 7941 handsets. All the phones are registered and working however when looking in the server activity log It is full with repeats of this (for each extension). The errors seem to repeat every few seconds for each handset. I currently have 1213 pages of logs covering about 5 hours. 10.0.0.210 being the IP of the 3CX server and 192.168.40.x being the vlan containing the ip phones. We also have a number of Yealink W52P DECT phones which don't appear to be logging any errors. So far I have tried different firmwares (8.5, 9.2 and 9.4) on the handsets, re-provisioning with default settings, downloading the latest provisioning template, checking the router to ensure all packets are being passed through correctly (as far as i can tell they are), adding a new extension on a new handset and have now run out of ideas. The reason for looking at the log is some of the sales staff have commented that a small number of inbound calls have sounded "corrupted" for a moment during the call then resumed fine. Is this something expected with the cisco handsets? A morning of googling only finds one reference to this error but with a 7961 handset and no solution. Thank you in advance for any help you can provide.