Today, I get a phone call regarding Wi-Fi not working in a lady’s room but working everywhere else in the house.
Me: “Thanks for calling IT. May I have your name, please?”
User: “It’s [User].”
I input her name into the thing, and it pops up red indicating a VIP who expects to be given whatever she wants. She usually gets it, too.
Me: “How may I help you today?”
User: “This will sound really weird and crazy, but I swear my Wi-Fi does not work right. Everywhere else, I can work just fine, but as soon as I bring it home, it just stops working.”
Oh, fun — one of THESE calls. Probably an all-metal house or an old-as-dirt house.
Me: “So, is it everywhere in your house?”
User: “Yes… No! Actually, last night, I worked while watching Netflix on the TV in the living room and had zero issues.”
Me: “Well, that’s a good place to start. Let’s go into your living room and test the Wi-Fi.”
User: “Sure thing.”
We test the Wi-Fi in every room in her house and find that the signal degrades significantly the instant she steps into her bedroom.
Me: “Okay, this is going to sound like some James Bond sci-fi stuff, but I bet something in your room is causing electromagnetic interference. Have you moved anything new into the room? I mean anything — a lamp, a microwave, coffeemaker, mini-fridge, or even non-electronic stuff like metal?”
User: “Who has a mini-fridge in their room?” *Laughs*
Me: “I actually keep drinks in mine by my desk while I work.”
User: “Oh. Well, there is nothing like that. Plus the router is in the other room. The only things over there are my art projects.”
Me: “Okay. I am reaching way out there now. Is there a lot of metal content in that wall?”
User: “No, but there is a lot of metal on it.”
Me: “How so? You do metal work for your art?”
User: “No, I use it to hang my art.”
Me: “That’s probably not it, but go ahead and send me a picture of it.”
She takes the picture and sends it to me. On a roughly six-by-eight-foot section of her wall is a mounted chain link fence with these little cut up soda cans as art hanging off of it. It takes me a full minute looking at the absurdity of the picture in front me before the light comes on.
Me: “Ma’am, that’s a faraday cage. Well… sort of.”
User: “What is a faraday cage?”
I hear from the background, “I TOLD YOU!”
User: “Ignore that; that’s my son. We keep yelling at him to move the modem and router into our room, but he says the fence is the problem.”
Me: “Well, to be honest, it kinda is. No, it’s not kinda. It definitely is.”
User: “Huh?”
Me: “So, a faraday cage is used to block signals. Basically, any linked metal cage can create a field where signals have trouble passing through.”
User: “This is that James Bond crap you were talking about?”
Me: “I mean, kinda? It’s not a full faraday cage because it’s just one side. It’s why your Wi-Fi works but constantly cuts out and stays at half strength. A faraday cage has to actually enclose something to properly shield it from radio and electromagnetic waves. But that chain link fence is in direct line of sight with the router.”
User: “I… don’t see how that is possible. It makes no sense. But you, my husband, and my sixteen-year-old son all say the same thing. They all say that moving my art to the garage will solve my problems.”
Me: “I agree with your assessment.”
User: “Are you willing to put your job on it?”
She has me stay on hold for thirty minutes as she gets her husband and son to move the art and fence to the garage.
User: “Okay, I am back. Pulling the ethernet cable… Huh, that was fast. It instantly connected to the Wi-Fi.”
Me: “Okay, let’s test it again.”
She has zero dropped pings on the ping test; before, it was every third one. A speed test gives her the full speed for her area.
User: “That was strange. Well, it is working now. How often you think this happens?”
Me: “I can legitimately state that I have never once run into this issue in my entire career.”
User: “Seriously?”
Me: “Yup. Now, I have run into weird things before.”
User: “Like what?”
Me: “In my parent’s house, if you stand in the laundry room on Wi-Fi, and I open both the fridge and freezer door in the kitchen, your phone will lose Wi-Fi connection. I had a friend who had to move his router five feet because a new lamp his mom loved was causing line-of-sight interference with his laptop. And my uncle decided to build an all-metal house: metal beams, metal roofing, and metal doors. He gets zero reception inside his house and has to run ethernet cables all over his home.”
User: “So, would running this ethernet cable through the wall be a better solution?”
Me: “Infinitely better.”
I thanked her and immediately shared the picture with everyone on my team. Only three had to be told what a faraday cage was. I am so proud of my team.