To all speculating GZCP has the whole array..GPS SATCOM ACARS SELCAL..no airline is going to get into the specifics without facts..this will be treated as aircraft missing comm lost till the first sign of contact in whatever form that might be :-(. AF MCC has live tracking as well and I have a feeling loss of contact times will be corrected too. The ELT would have been triggered too.. so there will be something soon