Of course, you’re already familiar with the four-by-four disks that you’re handed nearly every time you decide to go to a busy restaurant with a wait – but how do they work? Often, we do come across items that we use every day, but we still have no idea how they work. However, today, we’re going to look at how a restaurant pager must work in order to let you know when your table is ready.

Typically, we get handed this small little box that gives us the freedom to wander about while we wait for our table. But how does this technology work? In essence, this tiny box is actually just a pager. By definition, a pager is a very simple radio that listens to one station all the time. The radio transmitter broadcasts signals over a very specific frequency so that the pager can pick it up. All of the pagers for the specific network are tuned into the same frequency broadcast from the transmitter.

Each Pager has its own identification sequence known as a CAP (Channel Access Protocol) code, and each pager listens for its individual and unique code. When it hears its code, it alerts the user and, depending on the pager type, will let the user know additional information. There are 5 basic pager types. The Beeper, VoiceTone, Numeric, Alphanumeric, and Two-Way. They all serve different function in the notification type but for the same goal of alerting the user. Most restaurants use the beeper type. These are the ones that buzz in your hand to let you know your table is ready.

The restaurant will have a small paging system to cover the surrounding area, this is called an on-site paging system like a desktop transmitter. This is the device that sends out the signal for the pager is to be listening to for their unique code. The area range can change based on this device, but restaurants typically like to keep the area small anyway so that customers can make it back to the front desk to claim their table relatively quickly from when they receive their alert.

Pagers usually run on rechargeable batteries, hence the fact that you will usually see them stacked up in a tall pile. This is because they all charge together through the contact of the metal of the connective screws at the corners. They charge through conductive metal electricity and form a charging chain.

So, the next time you wait for a table at a restaurant and patiently (or not so patiently) stare at the pager in your hand, think about how much work goes into you knowing that your table is ready for you. You might just have a whole new appreciation for the technology that gives you the freedom to walk around while you wait.