Hi Jason Did you check these prerequisits? Before you perform a factory reset, ensure that the following conditions are met:•The phone must be on a DHCP-enabled network.•A valid TFTP server must be set in DHCP option 150 or option 66 on the DHCP serv...

Check network connection and route to the server. what is the complete error message ?Are they properly configured in CUCM?Anything preventing TFTP/HTTP communication between phones and CUCM?? Are they all local? The most likely the problem is that t...