Hi,
For freetdm, the context is specified in
/usr/local/freeswitch/conf/autoload_configs/freetdm.conf.xml (default)
<sangoma_pri_spans>
<span name="wp1" cfgprofile="profile1"><param name="context" value="YOUR CONTEXT HERE"/>
<param name="dialplan" value="XML"/>
</span>
:
:
:
</sangoma_pri_spans>