If SQ68 had no message to send, the acars would remain silent and the satcom would ping. There is definitely no identifiable data in a ping
EDIT: If data is to be sent either way then it will be preceded by a connection request (handshake) and yes that has identifiable date of course, I understood we were dealing with a ping.
Last edited by Xeptu; 17th Mar 2014 at 13:07.