Hi, I have an application configured to use a SIP server correctly. However, I also have a special case where I want to connect to one client which is not behind NAT and has fixed public IP (it's a process on a server). How can I directly send SIP invitation to that client and also skip SIP registration? I have turned off "pjsua_acc_add" method and tried modifying URL passed to configuration to match the address of the client (i.e. host). Now I am getting "SIP Register" message at that client which is wrong because I want to directly send an invite and skip SIP registration. Any help appreciated Regards, Mat --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 171107-0, 07/11/2017 Tested on: 07/11/2017 17:52:28 avast! - copyright (c) 1988-2017 AVAST Software. https://www.avast.com/antivirus