[DOC] Updated realtime billing doc
[DOC] Updated realtime billing doc

samael33/ASTPP,iNextrix/ASTPP,iNextrix/ASTPP,samael33/ASTPP,iNextrix/ASTPP,samael33/ASTPP,samael33/ASTPP,iNextrix/ASTPP,samael33/ASTPP,iNextrix/ASTPP