Send tiff-file by T.38?

I need to create application that send tiff-file (fax) from one computer and receive it in another using T.38 protocol (just from client to server without Asterisk). I use spandsp library - spandsp-0.0.3pre6.tgz ( But, unfortunately, it have not documention for T.38 functions. I understood sense of some functions and structures from test examples. But I could not found where it is need to set IP-address of destination host, exactly commands sequence, for example, and some other. Hint anybody can I find anywhere documention on spandsp T.38 functions, or prompt me how to do it :smile:.