5G Failover for Business: How It Keeps You Trading When Your Internet Goes Down

For most businesses, an internet outage means a lot more than a slow afternoon. Electronic Funds Transfer at Point of Sale (EFTPOS) terminals, cloud point of sale (POS) systems, phone systems and booking platforms usually all run over the same connection. When that connection drops, trading can stop with it.

Australia has seen how quickly that happens. During the nationwide Optus outage on 8 November 2023, more than 10 million people and around 400,000 businesses were affected, and many businesses spent most of the day unable to take card payments.

5G failover is one of the most practical ways to protect against that risk. This article covers what 5G failover is, how it works, and what to plan for before you rely on it.

What Is 5G Failover?

5G failover is a backup internet connection that runs over the 5G mobile network. It sits alongside your primary connection, whether that’s fibre, the National Broadband Network (NBN) or an Ethernet service, and takes over automatically if the primary link goes down.

In practice, it’s a business-grade router (such as Ericsson Cradlepoint) with two ways to connect. Your primary internet service plugs into its Ethernet port, and a 5G SIM inside the router provides the backup. When the primary connection fails, traffic moves across to 5G (failover). When the primary connection comes back, the router switches back to it (failback).

Most 5G failover routers also fall back to 4G where 5G isn’t available, so the backup still works at sites outside 5G coverage.

How 5G Failover Works

The process runs without anyone on site needing to step in:

• Monitoring: The router continuously checks the primary connection for outages and for degraded performance, such as heavy packet loss.
• Switchover: When the primary link fails or drops below set thresholds, the router moves traffic to the 5G connection.
• Traffic priorities: Policies decide which traffic uses the backup link. Most businesses prioritise payments, POS and phone systems, which keeps mobile data use under control.
• Failback: Once the primary connection is stable again, traffic returns to it automatically.

With Ericsson Cradlepoint routers, IT teams set these policies and monitor every site remotely through the NetCloud management platform. For businesses with multiple locations, that means outages and switchovers are visible from one place.

Why Businesses Need a Backup Internet Connection

Any business that can’t trade offline has a reason to consider 5G failover. The impact of an outage usually shows up in a few areas:

• Payments: EFTPOS terminals and integrated payment systems that run over the business internet connection stop working when it does.
• Cloud POS and inventory: Sales, stock and ordering systems hosted in the cloud become unreachable.
• Phone systems: Voice over Internet Protocol (VoIP) and cloud calling systems go down with the data connection, so customers can’t call in.
• Bookings and online orders: Reservation platforms, click and collect, and delivery orders stop flowing through.
• Multi-site operations: For retail chains and franchise networks, an outage at the carrier level can hit dozens or hundreds of locations at once.

The cost is highest during peak periods. An outage on a quiet Tuesday morning is an inconvenience. The same outage during Christmas trading can mean a significant share of the year’s sales walking out the door.

5G Failover vs a Second Wired Connection

A second fixed line might seem like the obvious backup, but it often shares the same weak points as the first. Both links can run through the same pit, conduit or exchange, so a single cable cut or equipment fault takes out both.

5G failover avoids that problem because it uses a completely different physical path: the mobile network. It’s also faster to deploy, with no trenching or new cabling, and the router can often be installed in a single visit.

5G speeds are also high enough to run the systems that matter most during an outage. For many sites, 5G can even serve as the primary connection, with fixed internet as the backup.

What to Plan Before You Deploy 5G Failover

A failover link only helps if it works on the day you need it. These are the areas to plan for.

Carrier Diversity

If your primary internet and your failover SIM are on the same carrier, a carrier-wide outage can take out both. The 2023 Optus outage affected fixed and mobile services together. Choosing a different carrier for the failover link is one of the simplest ways to make the backup independent of the primary connection.

Signal Where the Router Sits

Routers often end up in comms rooms, back offices or basements where mobile signal is weak. A site assessment checks the 5G and 4G signal at the router location before installation. Where a signal is poor, an external antenna mounted on the roof or an outside wall can make the difference between a reliable backup and one that barely connects.

Data Plans and Traffic Policies

Failover traffic runs over mobile data, so the plan needs to match how the link will be used. Clear traffic policies keep payments and phones running during an outage without letting large updates or video streaming burn through the data allowance.

Management and Testing

A failover link that isn’t monitored can fail without anyone noticing, such as when a SIM is suspended or the router loses signal. Remote management and regular switchover tests confirm the backup is ready before the primary connection drops.

Getting the Right 5G Failover Solution for Your Business

The right setup depends on:

• How many sites need protecting and how they’re managed.
• Which systems need to stay online during an outage.
• Which carrier provides your primary connection.
• 5G and 4G signal strength at each router location.
• Whether you want 5G as a backup only, or as a primary connection at some sites.

A professional site assessment is the starting point. It confirms your native mobile signal at each location, identifies the right carrier and hardware, and shapes the traffic policies that keep your critical systems running.

MobileCorp is an Australian communications technology company. We work with businesses across the country to design, deploy and manage Ericsson Cradlepoint 5G failover solutions, and we’re carrier-agnostic, so the failover link can sit on whichever network gives each site the most independence from its primary connection. Every project starts with a site assessment, and every solution is built around the specific sites, systems and trading patterns of the business.

[Request an Obligation-Free Site Assessment]

FAQs

How quickly does 5G failover switch over?

The switch happens automatically once the router detects an outage or a degraded link. Detection settings are configurable, and in most setups staff only notice a brief interruption before payments and phones are running again over 5G.

Does 5G failover work if the mobile network is down?

Only if the failover SIM is on a carrier that isn’t affected. That’s why carrier diversity matters. Putting the failover link on a different network from your primary internet service protects against a single carrier outage taking out both connections.

What if my business isn’t in a 5G coverage area?

Most 5G failover routers automatically fall back to 4G where 5G isn’t available. A site assessment confirms which network and signal strength are available at your location before installation.

How much mobile data does 5G failover use?

It depends on how long outages last and what traffic is allowed over the backup link. Traffic policies that prioritise payments, POS and phone systems keep data use low, and remote monitoring shows exactly how much the link uses.

Can 5G be the primary connection instead of the backup?

Yes. At many sites, 5G delivers speeds suitable for a primary business connection, especially where fixed internet is slow or takes a long time to install. In that setup, a fixed connection or a second carrier can provide the backup.