Hello, we currently have a 5000 HX Controller with about 100 5330/5330e/5340e phones on version 5.1 SP4 PR2. We are having an issue that I am having trouble finding more information on. DHCP for the phones is currently being handed out via a pfSense firewall on the phone VLAN 150. DHCP is providing option 43 for the Call_Srv and the TFTP server information to the phones.
Last week, I rebooted the phone controller while troubleshooting a voicemail to email issue. After that reboot, a number of users have reported that their phone is often disconnecting them in the middle of calls, and then stating on the screen Applications Loading for anywhere up to a minute. I have been able to resolve this issue on each phone, it seems, by power-cycling each phone manually.
I am not entirely familiar with the registration process that the phones follow, but am wondering how a reboot of the controller could cause this to happen, or if it cannot, and I should be investigating elsewhere.
Thank you for your input on this,