Hi All, My application somehow works but the 'on_create_media_transport' callback doesn't get called which to my understanding means that default adapters get used as opposed to the custom adapters. I also have: #define PJMEDIA_HAS_SRTP 0 in my config_site.h which should keep the SRTP off. Is there anything else that could be missing in order for the callback to be called? Regards, Mat --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 171012-0, 12/10/2017 Tested on: 13/10/2017 10:54:49 avast! - copyright (c) 1988-2017 AVAST Software. https://www.avast.com/antivirus