As far as I know, all B777 satcom links can be disabled by a few simple selections within the CDU interface on the flightdeck. No need to 'pull CB's' down in the EE bay at all. If data pings were being received after the LKP, either the satcom links were not disabled, or there is an independant satcom data logging system that I was not made aware of in my 15 years of flying the B777.