прошивка телефонов cisco spa30х-50х

[Muller7777]

день добрый
как прошить телефон прошивкой типа 
spa50x-30x-7-6-2a-recovery 
при утеряном пароле
или сбросить по инструкции с пришивальщика
 

This SPA requires a password in order to be
upgraded. If you do not have administrator's
privileges for this unit, please contact your
Service Provider or network administrator,
before proceeding.

You must provide the SPA administrator's
password to upgrade. If you are the administrator
and forgot the password, you may perform a
factory reset by entering * * * *, option 73738#,
and value 1 from a telephone connected to the
unit to be upgraded.

* * * * * * * * * * *  Warning  * * * * * * * * * * *
All settings will revert to default values
after factory reset!  You may not be able to
reestablish service after completing this upgrade
without first reentering service configuration
information.

спасибо.