[Freeswitch-dev] About Rxfax function of Freeswitch

HI, every body. Recently,i tested a case to use FreeSwitch to receive T38 fax from a As5400 (Cisco voice GW).According with Google and Freeswitch.org useful information,the procession is smooth.Rxfax could receive almost all papers. But the fax images received have some problems,that's the images were all re sized,were shorter and broader. I will show you one,it should be Fax paper type's problem.but i don't know how to revise.Anybody can give me some suggestions? thanks a lot.