Akuvox R20 Series - Security-Basic; Web Password Modify; Session Time out

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Other: To export and import config file.
3.13.Security-Basic
Go to Security->Basic, to modify password and session time.
3.13.1. Web Password Modify
To modify password of 'admin' or 'user' account.
3.13.2. Session time out
To configure session time out value. Over the value, user need
to login again to continue configuring.