Hi My configuration is a GXW4104 (IP 192.168.0.160) with two PSTN lines. The first line is a POTS line and the second line is a GSM gateway device. Both devices work correctly if I dial out but when I try and bridge between the two, nothing works as expected. The bridge is from the POTS line to a mobile number using the GSM gateway. I have created the following bridge for the POTS line (phone numbers removed for privacy reasons) <extension name="pots_line"> <condition field="destination_number" expression="^(xxxxxxxxxx)$"> <action application="bridge" data="sofia/internal/zzzzzzzzzz@192.168.0.160:5062"/> </condition> </extension> The bridge does eventually happen (long delay) but neither party can hear each other. Also, when I hang-up with one or both phones, the connection does not terminate and I have to reboot the GXW4104 to break the connection. I have bought the Freeswitch books and this seems to be something that should easily work. I have not added any variables into the <extension> definition as this is a simple bridge. What have I missed? Thanks in advance