F8887 is a technician from the second private room chat. They likely work at TTH as a technician. In this chat, they communicate with F2617 about a strange occurrence with random frequencies being sent from certain stations.

"Technician speaking"
"Hi, what's your number?"
"F8887, and yours?"
"This is F2617"
"Shit, it's still not connecting?"
"Yeah, no it got worse."
"How much worse?"
"Well now we are picking up random frequencies from the stations"
"well, I think we have to resort to the next plan"
"Yeah guess so and ���� ������ ������������� 
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