When I use two FreeSWITCH instances ('internal' and 'external'), all users register to the 'external' instance which acts as a gateway by 'internal' instance (which in turn is controlled by my applicaiton with commands sent by socket).

When user hangs up, the 'hanged up' event is propagated to the 'internal' instance after a long time (~3 minutes) instead of being propagated immediately.