does anybody know how does it work and how to use it in a dialplan?

freeswitch@nemesis>
freeswitch@nemesis>
freeswitch@nemesis> load mod_t38gateway
API CALL [load(mod_t38gateway)] output:
+OK

2009-10-30 22:44:38.204268 [NOTICE] mod_t38gateway.c:147 T.38 gateway enabled
2009-10-30 22:44:38.204268 [CONSOLE] switch_loadable_module.c:889 Successfully Loaded [mod_t38gateway]
2009-10-30 22:44:38.204268 [NOTICE] switch_loadable_module.c:248 Adding Application 't38gateway'
2009-10-30 22:44:38.205374 [NOTICE] switch_loadable_module.c:270 Adding API Function 't38gateway'
freeswitch@nemesis>
freeswitch@nemesis>
freeswitch@nemesis>
freeswitch@nemesis> t38gateway
API CALL [t38gateway()] output:
-USAGE: <uuid> <command>

freeswitch@nemesis>

T.