screen doesnt boots when i connect POE to 8851 only mute button is on What do i do how to troubleshoot?? or how to hard reset if i had to?? how to update frimware of the perticular phone if i
Have you checked the power inline status of the switchport? These phones only work with UPoE or PoE Class 4. This means the switchport you connect it to needs to have PoE class 4 capabilities.
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