Asterisk 1.6 and T38 functions?

Asterisk Asterisk Support
1

hello

I want to know what we can do with T38 module (functions)

Fax2Mail…?

2

I could install asterisk1.6 and app_fax.so

need I to install app_rxfax.so for asterisk 1.6 or app_fax.so is just need for 1.6 ?

please help me!