Ok guys, I give up. So I must ask help. :-( In summary: I configured two endpoints and I can call from one to the other. I can receive outbond calls too, through my gateway, and the registration to it seems fine. But I can't call outside. The outbound calls don't works. I don't know where I'm wrong, is there anyone who can put me on the right path, please? This is my gateway conf: <include> <gateway name="outbound-my_provider"> <param name="username" value="123456789"/> <!-- param name="auth-username" value="123456789@ims.my_provider.net"/ --> <!-- param name="password" value="my_password"/ --> <param name="realm" value="ims.my_provider.net"/> <param name="from-user" value="123456789"/> <param name="from-domain" value="ims.my_provider.net"/> <param name="caller-id-in-from" value="true"/> <param name="proxy" value="123.ims.my_provider.net:5060"/> <param name="register" value="false"/> <!-- param name="register-transport" value="udp"/ --> <param name="context" value="public"/> <param name="extension" value="123456789"/> <param name="extension-in-contact" value="true"/> <param name="expire-seconds" value="3600"/> <!--param name="cid-type" value="rpid"/--> <!-- param name="contact-params" value="domain_name=$${domain}"/ --> </gateway> <gateway name="123456789"> <param name="username" value="123456789@ims.my_provider.net"/> <param name="password" value="my_password"/> <param name="extension" value="123456789"/> <param name="proxy" value="ims.my_provider.net"/> <param name="from-user" value="123456789"/> <param name="from-domain" value="ims.my_provider.net"/> <param name="register-proxy" value="123.ims.my_provider.net:5060"/> <param name="expire-seconds" value="1800"/> <param name="retry-seconds" value="120"/> <param name="register" value="true"/> <param name="dtmf-type" value="rfc2833"/> <param name="register-transport" value="udp"/> <param name="context" value="public"/> </gateway> This is my dialplan: <!-- /etc/freeswitch/dialplan/public/my_gateway.xml --> <include> <extension name="outbound_calls"> <condition field="destination_number" expression="(^\d{5,14}$)"> <action application="set" data="effective_caller_id_name=123456789"/> <action application="set" data="effective_caller_id_number=123456789"/> <!-- action application="set" data="sip_h_P-Preferred-Identity=sip:123456789@ims.my_provider.net"/ --> <action application="bridge" data="sofia/gateway/outbound-my_provider/$1"/> </condition> </extension> </include> I'm natted and the parts comments out are about various tests. The firewall is opened for 5080 versus freeswitch. My freeswitch local ip is 172.16.16.209. This is my pastebin of my external call attempt: https://pastebin.freeswitch.org/view/05befe95 Thank you in advance. Best regards -- Distinti saluti /Paolo Visnoviz/