From my previous training when I did some Cabin Crew work, the ELT sends signals on 3 Frequencies, for as long as the battery life permits, normally closer to 48 hours than 30 days!
I've never heard an ELT to contain the Cockpit Voice Recorder or Flight Recorder unless your talking about something completely different.
Last edited by jamesleaman; 25th Aug 2012 at 18:15.