Cool little reference to portal

in fulpstation theres a red phone in ai chamber somewhere.

if you examine it it says,

“should anything ever go wrong…”

How is this tied to portal? SPOILERS!!!:

In portal glados is corrupt and after the scientists put these cores on her, A scienctist would sit next to a red phone in the room and if anything ever went wrong it would call the other red phone and so on

cool reference, Right?

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