Hi, I'm trying to implement the changes explained in https://freeswitch.org/confluence/display/FREESWITCH/mod_verto, to activate it. The part I don't understand fully is the dial-string changes, for example in the choice 1: Usage: ${verto_contact ${dialed_user}@${dialed_domain}}My first try was to use the second option: <param name="dial-string" value="{^^:sip_invite_domain=${dialed_domain}:presence_id=${dialed_user}@${dialed_domain}}${sofia_contact(*/${dialed_user}@${dialed_domain})}:${verto_contact ${dialed_user}@${dialed_domain}}"/> What I try was to call a local extension that is logged in using verto, but somehow is trying to look for it like if is a sofia user, of course it says that the user is not available. The above apporach of adding line in dial-string FAILS. I want to understand this line fully, mostly because of the flow that traverse this dial-string. I'd also try the last option of saying that a specific user is a verto user: <params> <param name="dial-string" value="${verto_contact ${dialed_user} <at> ${dialed_domain}}"/> </params> That works. But, I dont want to keep on adding dial-string line in every extension. Rather, just add this to directory/default.xml. Does anybody face same issue.