[Curtis]

Curtis.

Correct.  Any attempted phone call resets the timer. If there had been a series of attempted calls they would reset the hourly timer every time. If those calls were at regular intervals less than an hour, there would have been no GES interrogations at all, and thus no GES generated BTO pings.  The only BTO's we would have would be the AES logon generated ones.

Thanks much, Ventus.
So without this stunning neglegence of the owner of the missing plane there would be no SIO-theory possible, given the other circumstances (silence/ACARS off).
If we later learn there were more calls - e.g. during the trials against MAS/MAB - we should remember this.

A happy Christmas time for all of You.
Curtis