In This Guide
Key Takeaways at a Glance
- NBN 50/20 is the sweet spot for most cafés; aim for latency under 30–50 ms and jitter under 20 ms.
- Split POS, guest Wi‑Fi and back‑office using VLANs or separate SSIDs with client isolation.
- Turn on router QoS for EFTPOS and POS devices; reserve IPs with DHCP and use safe DNS.
- Cable anything critical: POS base, printers, EFTPOS docks and back‑office PC.
- Add 4G/5G failover and a small UPS so you can keep trading during NBN or power issues.
Does EFTPOS need internet?
In almost every case, yes. A modern EFTPOS terminal has to reach your bank or payment provider to approve each card payment, so it needs a working connection. That might be your NBN service over a cable or Wi‑Fi, or a 4G/5G SIM built into the terminal.
What differs is how the terminal connects and what happens when the line drops:
- Terminal on your network: it relies on your router, so an NBN outage, weak Wi‑Fi or a congested guest network can stop payments.
- Terminal with its own SIM: it doesn't depend on your NBN, but it does depend on mobile coverage at the counter, so test 4G/5G signal there first, especially in CBD or inner-city buildings.
- Integrated POS terminal: the POS, the terminal and the internet all need to work together, so a dropout can affect orders as well as payments.
- Offline modes: some terminals can hold a limited number of transactions until the connection returns. Whether yours can, and the limits, are set by your bank or provider, so check with them before relying on it.
For a café, the practical approach (and how we handle point-of-sale setup) is to cable the terminal, keep it off guest Wi‑Fi, and add a 4G/5G failover so a dropout doesn't stop the queue. The sections below walk through each step.
If payments keep dropping out, Geeks Brisbane can check the router, cabling, Wi‑Fi and 4G/5G failover onsite or remotely across Brisbane, Ipswich, Logan, Moreton Bay and the Redlands. Call 1300 600 004.
Do old phone-line EFTPOS terminals still work with the NBN?
Often not reliably. Older terminals built for a traditional phone line may not work once your service moves to the NBN, because the phone line they depend on can change or stop working. Ask your bank or payment provider about an IP or 4G/5G terminal, and have the network side checked before you switch.
Can EFTPOS work without Wi‑Fi?
Yes, if the terminal connects another way, such as a network cable to your router or its own 4G/5G SIM. Wi‑Fi is only one option. For busy cafés, a cabled connection is usually more reliable than wireless.
What happens to EFTPOS when the NBN goes down?
A terminal that relies on your NBN usually can't approve payments until the connection returns. A 4G/5G failover on your router, or a terminal with its own SIM, can keep card payments going through an NBN outage.
Should the EFTPOS terminal be on the guest Wi‑Fi?
No. Keep the terminal and POS on their own network, separate from guest Wi‑Fi and back-office devices. This protects card payments and stops customers streaming or downloading from slowing your transactions.
Can you help fix EFTPOS dropouts at my café?
Yes. Geeks Brisbane checks the network side of EFTPOS dropouts: router settings, cabling, Wi‑Fi and 4G/5G failover. We work onsite or remotely across Brisbane, Ipswich, Logan, Moreton Bay and the Redlands. The terminal itself is supported by your bank or payment provider. Call 1300 600 004 to book.
$205/hr onsite · $125/hr remote · 4.9 on Google across 252 Google reviews · same-day booking · all 600+ Brisbane suburbs · No Fix, No Fee on standard support (excludes hardware repairs and parts).
What it is and core concept
Definition
POS network requirements are the internet, Wi‑Fi, cabling and router settings your café needs so POS and EFTPOS stay online. Think of it as a small, tidy road system: fast NBN, clear lanes (VLANs), traffic rules (QoS), and backups (4G and battery) so payments never stall.
Why it matters
In Brisbane, a five‑minute outage at 8:00am feels like an hour. Cloud POS needs a stable link for orders and sync. EFTPOS needs low latency for quick approvals. Good setup stops lost sales, angry queues and reboots during storms or busy weekends.
How it works and step-by-step for pos network requirements
Process
Use this simple flow:
- Pick an NBN plan with enough speed and good latency (50/20 or better).
- Install a business‑grade router and switch.
- Create separate networks for POS, guest and back‑office.
- Cable the critical gear; keep guest traffic on Wi‑Fi.
- Enable QoS, set DNS, reserve IPs, and lock down ports.
- Add 4G/5G failover and a UPS.
- Update firmware and passwords; test monthly.
Featured answer
Most cafés run well on NBN 50/20 with latency under 30–50 ms, a router with QoS, and separate VLANs for POS, guest and back‑office. Cable your POS base, printers and EFTPOS docks, keep a 4G failover SIM ready, and power the modem/router with a small UPS to trade through outages.
Minimum NBN speed and latency for POS and cloud platforms
Speed needs are small for card payments but bigger for cloud POS and updates. Use these targets:
- EFTPOS connectivity: bandwidth is tiny (under 1 Mbps), but latency should sit under 50 ms with low jitter (under 20 ms).
- Cloud POS (menu sync, tickets, reports): allow 5–10 Mbps per busy register or tablet.
- Back‑office (email, invoices, backups): add another 10–20 Mbps.
- Plan pick: NBN 50/20 works for most cafés; 100/40 helps if you run cameras or heavy cloud backups.
- Tech types: FTTP and HFC are stable across Brisbane; FTTN can vary by line length (older pockets of West End, Red Hill, parts of Ipswich).
Separate POS, guest Wi‑Fi and back‑office networks (VLANs made simple)
Keep card data paths clean and guests away from your tills:
- Create three networks: POS (e.g., VLAN 10), Back‑office (VLAN 20), Guest (VLAN 30).
- Match Wi‑Fi SSIDs to VLANs. Example: “Cafe‑POS”, “Cafe‑Staff”, “Cafe‑Guest”.
- Turn on client isolation on guest so customers can’t see each other or your tills.
- Allow POS to reach printers and EFTPOS only; block guest to POS.
- If your gear is basic, use “Guest Network” on the router and keep POS devices cabled or on a hidden staff SSID.
Router settings: QoS, DNS, DHCP reservations and safe port use
- QoS: mark EFTPOS terminals and POS iPads as “high” priority. Many routers let you prioritise by device or MAC address.
- DNS: use reliable DNS (ISP, Cloudflare or Google). If your EFTPOS provider requires their DNS, follow that.
- DHCP reservations: lock each POS, printer and EFTPOS to a fixed IP so nothing “moves” mid‑rush.
- Ports: block unsolicited inbound traffic, disable UPnP, and allow standard outbound (HTTPS, NTP). Only open extras if your POS vendor says so.
- Double NAT: avoid modem‑router‑router stacks. Put the NBN modem in bridge mode and let one router run the network.
Cabling vs Wi‑Fi: what to cable and what can stay wireless
- Cable these: POS base or register PC, receipt and kitchen printers, EFTPOS dock or base station, back‑office PC or NAS.
- Wireless is fine for: waiter tablets on 5 GHz, guest devices, digital signage (if non‑critical).
- Wi‑Fi tips: use 5 GHz for POS/Staff, fixed channels (36–48 or 149–161), and keep the access point high and clear of fridges and microwaves.
- Old buildings: run Cat6 where you can; stapled or kinked cable causes random dropouts.
4G/5G failover and battery backups for uptime
- Choose a router with built‑in LTE or a USB 4G/5G dongle. Add a Telstra or Optus SIM with data.
- Set failover to “automatic” so it flips to mobile if NBN drops, then flips back when stable.
- UPS: a 650–1000 VA unit can run modem, router and switch for 45–90 minutes during Brisbane storms.
- Keep the EFTPOS terminal charger on the UPS too. Test failover monthly before trade.
Security basics: PCI DSS, updates and password hygiene
- PCI DSS: do not store card data. Keep POS separate from guest Wi‑Fi and log who has access.
- WPA2/WPA3 on Wi‑Fi. Turn off WPS. Use long passphrases (three or four random words).
- Update router, access points and POS apps. Reboot after patching in quiet hours.
- Staff off‑boarding: remove old staff from Wi‑Fi and POS accounts on their last shift.
- Backups: store POS exports and docs in the cloud or a NAS, not on a single laptop.
Troubleshooting checklist for common EFTPOS dropouts
- Check the terminal’s network icon: Wi‑Fi or Ethernet? If Wi‑Fi, is it on the Staff/POS SSID?
- Ping test from a laptop: gateway and a public site. High latency or packet loss means a link issue.
- Power cycle modem and router once, in order: modem, wait 2 mins; router, wait 2 mins; switch/APs.
- Disable guest Wi‑Fi for five minutes. If EFTPOS speeds up, enable QoS or rate‑limit guests.
- Move the terminal away from metal, fridges or microwave ovens; try 5 GHz.
- If cabled, swap the patch lead and port on the switch.
- Failover test: pull the NBN cable and confirm the router flips to 4G/5G.
Need a hand?
Same-day onsite or remote support across Brisbane. No Fix, No Fee (excludes hardware repairs and parts).
Book a Geek — From $125/hrCommon problems in Brisbane
Weather and infrastructure
- Summer storms and humidity: surges trip cheap power boards, and moisture ruins wall sockets. Use a UPS and surge‑protected power.
- Dense apartments (Fortitude Valley, South Brisbane): heavy Wi‑Fi congestion. Fix with 5 GHz, channel planning and more access points.
- Older buildings (West End, Spring Hill): long copper runs on FTTN cause jitter. Consider Business NBN or 4G/5G backup.
- HFC quirks (New Farm, Carina): dropouts after rain. Keep the HFC modem off the floor and use quality RG6 leads.
- Retail strips (Sunnybank, Logan Central, Capalaba, North Lakes): busy RF environments. Extra APs and VLANs help keep POS steady.
Troubleshooting and quick checks
Short answer
If EFTPOS keeps dropping, prioritise it with router QoS, split guests to a separate Wi‑Fi, and cable your POS gear. Aim for NBN 50/20 and latency under 50 ms. Add 4G failover and a UPS so you can keep taking payments when the NBN or power hiccups.
Quick checks
Try these safe checks:
- Is the terminal on the right SSID? Move from Guest to Staff/POS.
- Restart the terminal, then the router if needed (once only).
- Turn off and on Wi‑Fi on the terminal to re‑associate.
- Swap the Ethernet cable and port for cabled devices.
- Run an internet speed test off‑peak and peak. If speed or latency swings, call your ISP.
- Check for router firmware updates outside trading hours.
- Test failover by unplugging the NBN from the router for 30 seconds.
Safety notes and when to call a pro
Red flags
Call a technician if power smells hot or outlets are loose, the NBN modem reboots on its own, you see exposed or water‑marked cabling, or dropouts happen at the same time daily. If you process lots of cards and can’t isolate guest Wi‑Fi from POS, get help to set VLANs and QoS properly.
Local insights and examples
Brisbane/SEQ examples
In New Farm and Teneriffe, HFC cafés run best with NBN 50/20, a bridged modem, one solid router, and 4G failover. In West End terraces, we see FTTN lines that vary by time of day; cabling POS and setting QoS fixes most dropouts. Shopping‑centre sites in Carindale and Chermside face heavy Wi‑Fi noise, so multiple 5 GHz access points and guest rate‑limits keep POS snappy. Coastal stores from Redcliffe to the Gold Coast benefit from a UPS during storm season; it smooths tiny outages that would otherwise break EFTPOS mid‑sale.