I was given Alcate-Lucent 8028s Premium Desk Phone phone to test for the compatibility of the SIP protocol with our SIP-server.
But unfortunately the administrator password (web-interface and, as I assume and the password in the settings of the phone itself) was set and lost

Is there any procedure to reset the phone to factory settings?
Please, can you describe in more detail, because I am not very familiar with the equipment of this manufacturer.