Stéphane Richard, the CEO of Orange has made a commitment that the results of the internal investigation will be known "seven days".
A necessary transparency given the circumstances and consequences of the bug.
The operator has already ruled out the possibility of computer hacking and points to a software failure, a poorly executed computer command.
The six routers in the group making the link between the fiber or mobile links and the old copper network still mainly used by emergency call entries all malfunctioned at the same time.
An "impossible" failure on paper.
To read also: Breakdown of emergency numbers "rare and extremely serious": story of a nightmare night for Orange
Wednesday June 2 at the end of the day, calls to 14, 15, 18 or even 112, did not go through.
Or more precisely, 8 out of 10 calls made from a landline reached their target and 9 out of 10 from a cell phone.
But for emergency numbers, an average failure rate of around 20% is unbearable.
Especially since four deaths would be indirectly attributable to this failure.
Failure of emergency numbers: is Orange liable to be held responsible?