code: private void startConferenceTimer() {
          final long conferenceTotalLifeInMillis = RestcommConfiguration.getInstance().getMain().getConferenceTimeout()*1000;
          final long conferenceRemainingLife =  conferenceTotalLifeInMillis - conferenceAge();
          context().setReceiveTimeout(Duration.create(conferenceRemainingLife, TimeUnit.MILLISECONDS));
          if(logger.isInfoEnabled())
              logger.info(String.format("conference timer started for: %s milliseconds", conferenceRemainingLife));
      }
docs: startConferenceTimer - conference should expire after 4 hours/(configurable)