The complaint is always the same. It works fine in the morning. By seven o’clock the card readers are timing out, the tablets won’t load, and someone is asking whether it’s the internet again.
It’s almost never the internet. Here’s what’s actually happening, in rough order of how often we find it.
Everything is on one network
Guest devices, your point-of-sale, the office computer, the cameras, the music — all sharing the same space. At 10am there are four devices on it. At 7pm there are ninety, most of them phones your customers never asked to connect but which connect anyway.
Your payment terminal is now competing with somebody streaming video at table nine. The fix is segmentation: separate networks for guests, payments, and back-office, with the important traffic prioritized. This is also what your PCI obligations require, so it’s worth doing regardless.
Not enough access points, in the wrong places
One access point in the office does not cover a dining room. Wi-Fi doesn’t travel well through kitchens full of stainless steel, through concrete, or through the metal in a drop ceiling grid.
What looks like weak signal is usually a device clinging to a distant access point instead of handing off to a nearer one. More coverage, positioned from an actual site survey rather than guesswork, fixes it.
Consumer equipment doing commercial work
The router from the ISP is designed for a house. It has a limit on how many devices it can track at once, and when it hits that limit it doesn’t warn you — it just starts dropping things. Above sixty or seventy concurrent connections, a home router is out of its depth.
Channel congestion
If you’re in a strip mall or a downtown block, you’re sharing airspace with every other business nearby. On 2.4GHz there are only three non-overlapping channels, and everyone is on them. Moving what you can to 5GHz and choosing channels deliberately makes a measurable difference.
The one nobody checks
Sometimes it is the circuit. Not down, but saturated — particularly if your cameras upload to the cloud, or an overnight backup is running at the wrong hour. Worth ruling out, but check it after the four above, not before.
How to tell which one you have
If it degrades gradually as the room fills, it’s capacity or segmentation. If it’s bad in specific physical spots regardless of how busy you are, it’s coverage. If everything fails at once, look at the circuit or the router.
A proper survey answers this in an afternoon. Guessing at it, in our experience, takes months and usually involves buying at least one thing that doesn’t help.