Hi, I have the exact same problem with the 514G and with the 525G2. I have these phones setup with 3cx pbx's for several customers and they all have the same problem with these phones: ass soon as they answer a call from a call queue the phone will freeze and eventually reboot. If the call is answered from a direct call or a ring group the phone works just fine. I have a support case going with cisco but it's slow going. (took me 3 months to get them to setup a phone in their labs and reproduce the issue) I do have a workaround for the moment: If I disable the: "support replaces header" option the issue is resolved. Althouh I have been advised that this could have negative effects on other functions (didn't notice any so far). Upgrade of firmware tot 7.5.5 didn't fix the issue.  I don't have any BLF configured on these devices. Regards, Timmy ... View more

Hi, I have a similar problem, only the phones hang only when a call from a call queue is answered. All direct calls don't trigger the reboots and phones freezing. Which PBX are you using? Can you check if the phones freezing happens right after accepting queued calls? I have a support ticket running, but it's slow going. ... View more

I have the same problem, brand new switch, traffic is running slower than with a generic unmanaged switch. any suggestions are welcome ... View more