https://qooah.com/2011/04/19/nec-n-06c-%e8%b6%85%e8%96%84%e9%98%b2%e6%b0%b4%e6%89%8b%e6%a9%9f-%e9%a9%9a%e8%89%b7%e7%8f%be%e8%ba%ab/