Hi, In my scenario, that variable looks like this: variable_sip_outgoing_contact_uri: [<sip:gw+mygw1@10.1.1.1:5060 ;transport=udp;gw=mygw1>] Is it possible, to make it look like this? : variable_sip_outgoing_contact_uri: [<sip:10.1.1.1:5060>] So far, the things I've found for the gateway configuration are: <param name="extension-in-contact" value="true"/> <param name="extension" value="contact_username_part"/> ...which only replaces the username part, and: <param name="contact-params" value="new_contact_parameter"/> ... which only adds to the contact parameters. I tried "" and "_undef_" combinations without success. Can you give me some clues about how to trim those contact header parts, if possible? Thanks, Stefan