POS systems and branch connectivity
A till that freezes on a Saturday afternoon costs revenue on the spot, and the queue does not wait for a ticket to be triaged. Retail is the sector where the gap between a good and a mediocre IT design is measurable in euros the same day.
A branch network should assume the line will drop. That means a second path, usually 4G or 5G failover, automatic switchover, and a payment flow that keeps working while the connection recovers.
Separate the traffic. Tills and payment terminals on their own segment, staff devices on another, guest Wi-Fi on a third, so a busy guest network cannot slow a transaction.
Plan the work around opening hours, not through them. Changes go in before opening or after closing, and never in the four weeks around your peak season.
What actually breaks in a shop
In our experience the failures that cost money are rarely dramatic. They are the same five things.
- The line to the payment provider drops and there is no second path.
- A guest Wi-Fi network shares capacity with the tills and someone streams video.
- A handheld scanner roams badly between access points and drops mid-scan.
- A power dip restarts a till and it comes back without the printer.
- An update was pushed on a Friday afternoon.
None of those need expensive equipment to prevent. They need a design that assumed they would happen.
How we design a branch
| Layer | What goes in | Why |
|---|---|---|
| Connection | Fixed line plus 4G or 5G failover, automatic switchover | The line will drop; the question is whether anyone notices |
| Edge | Firewall with central management across all branches | One console, so a change does not need a visit per site |
| Segmentation | Separate segments for tills, staff, guests and devices | A busy guest network cannot slow a transaction |
| Wireless | Access points placed on measurement, not on cabling convenience | Scanners are far less forgiving than laptops |
| Power | UPS on the till position and the network cabinet | A dip should not become a restart |
Wireless in a shop is not wireless in an office
Stock absorbs signal, and a shop measures completely differently full than empty. Metal racking reflects it. A scanner held at hip height sees a different network from a laptop on a desk. All of that is why we measure with Ekahau before placing anything, and again after installation, rather than working from a floor plan.
The method is described under Wi-Fi analysis, and the reasons it matters most in retail under retail IT.
Peak days need a different rhythm
The four weeks around Black Friday and the December period are not a good time to be improving anything. We freeze changes in that window, verify the failover path before it starts, and staff the desk for the hours the shops are actually open, including Sundays.
What that requires in advance is boring and effective: a tested failover, a spare till configured and on a shelf, printed instructions at the till position for what to do when the connection drops, and a number that reaches a person rather than a queue.
Managing forty branches without visiting forty branches
The thing that decides whether a retail estate is manageable is whether a change can be made centrally. Cloud-managed switching and firewalls from Cisco, Fortinet or Ubiquiti mean a policy change reaches every branch at once rather than becoming a schedule of site visits.
The same applies to the devices. Tills, scanners and staff devices that are enrolled centrally can be re-imaged remotely, which turns a broken till from a visit into a swap.
Scanners and stock devices
Zebra scanners, mobile computers and label printers are the devices that stop the work in a shop or a stockroom. They roam constantly and they tolerate a weak network far less well than a laptop does. When a store reports that Wi-Fi is fine but scanning drops, that is almost always a roaming or channel problem rather than a coverage one.
Questions we get about this
What retail IT managers ask us most.
What should a shop do when the internet connection drops?
Nothing, if the design is right. A second path over 4G or 5G with automatic switchover means the tills keep transacting while the fixed line recovers. Where that is not in place, the fallback has to be a printed procedure at the till position rather than a phone call to head office.
How many access points does a shop need?
It depends on the layout, the racking and the stock, which is why the honest answer requires a measurement. A survey typically produces a number lower than the guess, because most poor coverage is a placement and channel problem rather than a quantity problem.
Can you support shops on Sundays and public holidays?
Yes. Cover is set to your opening hours rather than to office hours, and evenings, nights and weekends are worked as a shift by our own people, so it is genuinely staffed.
Do you freeze changes during peak season?
Yes, as standard. No non-critical changes in the four weeks around Black Friday and the December period, with the failover path verified before the freeze starts.
Where this lands in our work
Where retail work sits.
Want this looked at for your own sites?
Half an hour on a call is usually enough to tell you whether we are the right party for it, and we will say so if we are not.