Came across another paper that I had saved from a business trip to El Paso Texas. I stayed at a Hilton there and the phone instruction card caught my interest. Besides the basic how to use voicemail and how to dial long distance, I notice this at the bottom:
To retrieve messages from outside hotel, dial hotel, ask for extension 599 then dial 8 + room number
So does it just dump you to the voicemail system without a password? All it asks is the room number? Can this be true? Maybe once you get transferred it still prompts you for a password or maybe you can spoof a number to it to bypass?
Anyway, throwing the paper away but sharing it for those who are interested. Maybe other Hiltons work the same way?