Caissons or no caissons?

I have a serious problem. I live in a Roman fort and when I need my dad I have to go room to room.

Do you think I should slam some cans (caissons). for improved communication and "eyes and boots"? Because it's really annoying.

submitted by /u/whitelynx22
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from hacking: security in practice https://ift.tt/S0PN6kW

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