[Freeswitch-users] how to monitor a call session?

can i monitor an ongoing call session by receiving freeswitch events through esl outbound socket? for example, i can have another process monitoring the sip call sessioin by acquiring call events(answer, hangup, etc.) from freeswitch. are the following steps ok? 1. create a socket server in a process 2. adding <action application="socket" data="IPaddr:port async"/> to the dialplan xml. 3. get the outbound socket connection from freeswitch 4. acquire call events should i do some event subscription before step 4? any response is appreciated!