What is t38modem?

 * From your fax or voice application view point it's a fax/voice modem pool.
 * From IP network view point it's a H.323/SIP endpoint with T.38 fax support.
 * From your view point it's a gateway between an application and IP network.

This package requires both the OPAL and ptlib packages (both available on
SlackBuilds.)  After building and installing OPAL package keep the OPAL source
tree on disk.  This package will point to OPAL source tree and use files created
during its build processes to create this package.