What is that other phone jack really connected to?
A hidden USB memory stick, perhaps?
A GSM Bug?
A microphone?
What is that USB connector on the UPS power strip really connected to?
A GSM Bug?!
A hard drive?!?!
A SpyCam?
If your sweep team is not disassembling these common ports, they are not finding these common covert data vaults and bugs.
Time for a clean sweep? Call me.
~Kevin