See if you can find the manual and figure out how to factory resetclear the values.

Ip phone not working. This approach is recommended if you are managing Android Enterprise work profile devices in the same Intune tenant as your Teams device. Possible the phone wont support that either. I enabled dynamic QoS giving the phone the Highest Device Priority.

Sometimes the modem takes a minute or two to switch over to a public IP adddress when a single PC or device is connected. Looks like you have applied config on Common Phone Profile and configuration applied on phone tftp config file. This is happening on all phones and the Audio Path is set correctly.

C9300 8021x EAP-MD5 for IP-Phones not working. Even with the static ip we cannot ping the phones locally. We have cisco C3560X-48P Switches in our branches and use Avaya IP-Phones for our call agents.

The site cannot use their speakerphone button to grab a line with the speakerphone answer a call with it or transfer from the handset to the speakerphone. Plug directly into switch port unit powers up and begins to initialize but keeps getting failed getting network errors it cannot find the DHCP server that all other devices are able to get. Maybe the IP phone has a static IP set.

What could be blocking my IP Phone from working while plugged into the back of the ATT router. All switchports are protected by 8021x and our Avaya IP-Phones use EAP-MD5 with username and password to authenticat the phone. When you plug in an IP phone the phone will attempt to boot and configure itself.

2nd tier tech support says the modem is configured. So we tried giving the phone a static ip on local LAN with all settings correct that work with PCs printer etc. I was able to make this work on DS phones but not IP phones.