Hi, I just tried FreeSWITCH together with t38modem and HylaFAX. But when I bridge the call to the modem I get the following error: 2009-05-14 00:22:38 [ERR] sofia.c:3280 sofia_handle_sip_i_state() Reinvite Codec Error! Does anyone know how to set this up? To PSTN I use a Lancom router which converts T38 to Euro-ISDN and vice versa. The t38modem was started with the following parameters: /usr/bin/t38modem -tt -o /var/log/t38modem.log --no-h323 -u t38modem --sip-register t38modem@freeswitch,password --sip-listen udp\$127.0.0.1:6060 --ptty +/dev/ttyT38-1 --route "modem:.*=sip:<dn>@127.0.0.1" --route "sip:.*=modem:<dn>" I also created a directory entry for FreeSWITCH with the following content: <include> <user id="t38modem"> <params> <param name="password" value="password"/> </params> <variables> <variable name="toll_allow" value="domestic,international,local"/> <variable name="accountcode" value="t38modem"/> <variable name="user_context" value="default"/> <variable name="effective_caller_id_name" value="Fax"/> <variable name="effective_caller_id_number" value="xxxxxxxx"/> <variable name="outbound_caller_id_name" value="$${outbound_caller_name}"/> <variable name="outbound_caller_id_number" value="$${outbound_caller_id}"/> <variable name="max_calls" value="1"/> <variable name="callgroup" value="default"/> </variables> </user> </include> The bridging is done in perl: $session->execute("bridge","user/t38modem@" . $VARS{"domain"}); Any help is appreciated. Thanks, Klaus