below is version and GW config : FreeSWITCH Version 1.10.0-release+git~20190805T172826Z~7a921c608b~64bit (git 7a921c6 2019-08-05 17:28:26Z 64bit) <gateway name="5551110000"> <param name="extension" value="5551110000"/> <param name="from-user" value="5551110000"/> <param name="from-domain" value="mydomain.us"/> <param name="username" value="myuser"/> <param name="password" value="mypass"/> <param name="extension-in-contact" value="true"/> <param name="expire-seconds" value="60"/> <param name="realm" value="mydomain.us"/> <param name="register-proxy" value="mydomain.us:35060"/> <param name="register" value="true"/> <param name="retry-seconds" value="30"/> <param name="register-transport" value="tcp"/> <param name="context" value="public"/> </gateway>