: If DHCP continues to fail, you can manually assign an IP address to the phone.
: Mitel phones often operate on a specific Voice VLAN. If the switch port isn't configured to "tag" the voice traffic or if the DHCP server isn't listening on that specific VLAN, the discovery process will fail. mitel-5320e-ip-phone-stuck-on-dhcp-discovery
: Confirm that your router or server has an active DHCP pool with available addresses. If the pool is full, the phone will wait indefinitely. : If DHCP continues to fail, you can
Navigate through the menu using the keys to find and select Yes . : If DHCP continues to fail
Hold the (or the volume keys) while booting the phone to enter the configuration menu.