Hi, I'm not sure if it fits what you want to do but you can check topos module to change contact header https://www.kamailio.org/docs/modules/devel/modules/topos.html   -----Mensaje original----- De: ramaseshi.kolli--- via sr-users &lt;sr-users(a)lists.kamailio.org&gt; Enviado el: domingo, 7 de abril de 2024 15:41 Para: sr-users(a)lists.kamailio.org CC: ramaseshi.kolli(a)gmail.com Asunto: [SR-Users] Unable to remove/modify/replace "Contact SIP header' Hi All, My requirement is when incoming call comes from internal user in i want to put kamailio ip and port in Contact header and forward or dispatch request to sip trunk carrier but i am unable to do so using KEMI frame work LUA. Can someone please give some pointer please? KSR.textops.remove_hf("Contact"); KSR.textopsx.assign_hf_value("Contact","<sip:1234@4.5.6.7>"); KSR.rtpengine.rtpengine_manage0(); if KSR.tm.t_relay()<0 then KSR.sl.sl_reply_error(); end __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: