oiaohm, thank you for your reply, but I do not want a new package to deal with the H248 protocol, because the data from the network devices is not the standard H248 stream which has been transformed. The dll supplied by the network devices is to deal with this transform. Thanks! oiaohm wrote: > waterson79 its not another interface for this by any chance. > > http://www.erlang.org/project/megaco/index.html > > If so don't bother messing around with the windows dll just port accross to native.