X25 Packet layer Implementation ( Linux Kernel )

Hi,

I would like to use additional facilities such as "calling address
extension" , "called address extension" to develop my x25 applications .

But I did not find this support in x25.h . The implementation
in the Linux kernel seems to support only some facilities: packet size, window size, throughput etc . Is this information right ?

Is there any way to use these additional facilities in Linux without
to depends of a hardware supplier ? Any free solution ?!

Thank you,

Frederico Faria

Frederico Charles S. Faria
ATI / ATITEL  Ltda
www.ati.com.br
(31) - 2105-3100