In a SIP TLS call initial SIP INVITE with proxy authentication uri is populated with transport=tls, which seems to be causing issues with far end. How can I modify this field? I need to be (uri=" sip:+14089234300@tls.itsp.com) like this: Proxy-Authorization: Digest username="gonzalo", realm="sip.itsp.com", nonce="76202e080586a818939c7b1292e61317", cnonce="CoLCw8Y1EjOpXQqrj4sqmw", opaque="b4728d445b067bf647afd6d7028881f6", algorithm=MD5, uri=" sip:+14089234300@tls.itsp.com", response="d901a524745a6124c50e6dac1c08a502", qop=auth, nc=000000 Instead of sip:+14089234300@gonzalotls.itsp.com;transport=tls: Proxy-Authorization: Digest username="gonzalo", realm="sip.itsp.com", nonce="5c99ec833921f9e31eb50d27c6230b33", cnonce="0sNq8sY2EjOpXQqrj4sqmw", opaque="c85f5b8d3a7ac674837b72594bf3c7b8", algorithm=MD5, uri=" sip:+14089234300@tls.itsp.com;transport=tls", response="d17b81a6cbbb1538d5c9a03e35d6bdde", qop=auth, nc=00000001 This is my configuration: <include> <gateway name="itsp-tls"> <param name="tls-version" value="tlsv1"/> <param name="register-transport" value="tls"/> <param name="username" value="gonzalo*****"/> <param name="password" value="password****"/> <param name="realm" value="itsp-tls"/> <param name="proxy" value="tls.itsp.com"/> <!-- (your configured Trunk SIP URI) --> <param name="register" value="false"/> </gateway> </include> <extension name="us_itsp_secure"> <action application="log" data="INFO Processing REGEX"/> <condition field="destination_number" expression="^80(\d{11})$"> <action application="set" data="proxy_media=false"/> <action application="set" data="bypass_media=false"/> <action application="export" data="zrtp_secure_media=false"/> <action application="export" data="nolocal:rtp_secure_media=mandatory:AES_CM_128_HMAC_SHA1_80"/> <action application="set" data="dialed_number=+$1"/> <action application="log" data="INFO Processing US call to ITSP Secure ${dialed_number}"/> <action application="bridge" data="sofia/gateway/itsp-tls/${dialed_number}"/> </condition> </extension> Thanks