I am writing an application that uses FreeTDM with a Digium TE-220 Dual T1 card. I started by looking at the testanalog sample and found that I also needed to add ftdm_global_configuration after ftdm_global_init. I am now able to place a call, but I get a segfault early on referencing sigmsg->channel. I am using an Adtran TSU600e for a channel bank and have a mixture of FXS and FXO cards in it. Right now I am just testing with a phone plugged into an FXS port configured for TANDEM_LS. The T1 is configured AMI/D4 for channelized T1 with robbed bit signalling. The T1 is up and I have no alarms. There isn't a lot of information on the FreeSWITCH Wiki or on the Sangoma FreeTDM Wiki for T1 RBS. There is one mention that I should use channel type of fxo-channel or fxs-channel for RBS ( http://wiki.freeswitch.org/wiki/FreeTDM ). I saw another place that says to use em-channel, but it may be specific to running Dahdi on Sangoma cards ( http://wiki.sangoma.com/FreeSWITCH-Dahdi-Mode ). I have tried both configurations, but have gotten further with the fxo-channel config than with the em-channel config. With the channel set to fxo-channel I get a segfault when I place a call and the first sigmsg->channel is referenced. I can open a Jira and add backtraces, but I wanted to check if I probably had a configuration issue first. E&M configuration I tried: [span zt tsu600e] trunk_type => EM em-channel => 1-4 ;fxo-channel => 1-4 ;fxs-channel => 5-6 ;fxo-channel => 9-12 FXO config I tried: [span zt tsu600e] fxo-channel => 1-4 Channel 1-4 is really an FXS card. I am using the reverse like I used to with Asterisk. Not sure if it is correct or not. Thanks, David -- David George Hark Technologies