Hi All, I have reviewed the Mod spandsp wiki http://wiki.freeswitch.org/wiki/Mod_spandsp There is an example about T.38 FAX. Samples Here is a working example using FreeSWITCH as a T.38-gateway. I used the following software and devices: FAX_B: Infotec IF2100e ATA_B: Cisco 186 v3.2.1 FAX_A: RICOH FAX2000L (Super G3, 14.400 Baud) ATA_A: Grandstream HandyTone 502 Product model: HT-502 V1.2A Firmware: Program-- 1.0.3.10 Bootloader-- 1.0.0.9 Core-- 1.0.3.6 Base-- 1.0.3.8 FreeSWITCH: git head of 2010-11-19 PRI E1-Stack: openzap Sangoma-Wanpipe: version 3.5.17 TDM-Card: Sangoma A104d My questions: 1. Is there any detail configuration manual for RICOH FAX2000L? I could NOT find on google also. 2. I'm using RICHO MP2000. From the manual, seems it support T.38. But only could set account, NO password. Freeswitch could accept account without password? I also use Wireshark to catch the IP package. seems NO sip regiest info from the RICHO MP2000. Also NO very detail configuration manual from RICHO. 3. Here the T.38 could connect to Freeswitch without ATA or NOT? it's just in LAN? Thanks all! 2014-04-09 sparklezou