setting send-connect-ack to true as below solved my problem: <configuration name="freetdm.conf" description="Freetdm Configuration"> <settings> <param name="debug" value="0"/> <!--<param name="hold-music" value="$${moh_uri}"/>--> <!--<param name="enable-analog-option" value="call-swap"/>--> <!--<param name="enable-analog-option" value="3-way"/>--> </settings> <config_profiles> <profile name="my_pri_te_1"> <param name="switchtype" value="euroisdn"/> <param name="interface" value="pri_cpe"/> </profile> </config_profiles> <sangoma_pri_spans> <span name="wp1" cfgprofile="my_pri_te_1"> <param name="dialplan" value="XML"/> <param name="context" value="public"/> *<param name="send-connect-ack" value="true"/>* <!--param name="tei" value="<*0..127>"/--> <!--param name="overlap" value="<yes|*no>"/--> <!--param name="setup arbitration" value="<yes|*no>"/--> <!--param name="facility" value="<yes|*no>"/--> <!--param name="facility-timeout" value="0"/--> <!--param name="outbound-called-ton" value="<*unknown|international|national|network-specific|subscriber-number|abbreviated-number|reserved>"/--> <param name="outbound-called-npi" value="private"/> <!--param name="outbound-calling-ton" value="<*unknown|international|national|network-specific|subscriber-number|abbreviated-number|reserved>"/--> <param name="outbound-calling-npi" value="private"/> <!--param name="outbound-rdnis-ton" value="<*unknown|international|national|network-specific|subscriber-number|abbreviated-number|reserved>"/--> <param name="outbound-rdnis-npi" value="private"/> <!--param name="outbound-bearer_cap" value="<*speech|unrestricted-digital|3.1Khz>"/--> <!--param name="outbound-bearer_layer1" value="<v110|ulaw|alaw>"/--> </span> <span name="wp2" cfgprofile="my_pri_te_1"> <param name="dialplan" value="XML"/> <param name="context" value="public"/> </span> </sangoma_pri_spans> <analog_spans> </analog_spans> </configuration> On Wed, May 30, 2018 at 1:11 PM, Babak Yakhchali <babak.freeswitch@gmail.com

wrote:

Hi I connected freeswitch to tda600 using a pri line and mod_freetdm. incomming calls from tda600 work without any problems but outgoing calls to tda600 drop with cause 102 after a few seconds after answering. I pasted the logs from console on pastebin: https://pastebin.freeswitch.org/view/5da22227