12480 was designed Bradley Tetzlaff as an Alphanumeric writing system.
This was created for the computer game Ecclemony in 2002 and is intended to be the basis of a constructed languages. In this respect it is much like Esperanto or the Klingon Language from Star Trek.
12480 is not based upon audible elements or phonemes, but rather upon binary.
The number 12480 comes from the hexadecimal base-16 numerical sequence.