Your Ethernet cables aren’t just for data—here’s everything else they can power


When most people look at an Ethernet cable, their first thought would be that this is how you transport data. However, you’ve probably seen devices like security cameras or network switches that aren’t only sending data over Ethernet, but also receiving power using that one cable.

Ethernet isn’t just for data

More powah!

Power over Ethernet (PoE) is exactly what it sounds like. It’s a standard that allows power to be sent over an Ethernet cable. This means that devices that fall within the PoE power range don’t need to be near an outlet, and you don’t need a separate power adapter.

Security cameras are an obvious use case for this technology. After all, you usually place them in spots that don’t have good power access, and you’re going to run Ethernet to them anyway, so if you can also power those cameras at the same time, it’s going to be the most secure and elegant solution. It also makes it easy to centralize your backup power, which is a big deal when it comes to security. An even more obvious use for this technology is to power a network switch. So it’s easy to offer ample Ethernet ports anywhere, without worrying about a building’s electrical wiring.

Security cameras are only the beginning

Free yourself from the grid

poe cctv camera

Security cameras might be a good place to start, but once you have a standard that supplies a guaranteed level of power, hardware designers can let their imaginations run. Wireless access points are a great candidate for PoE, and it allows you to position them in optimal spots for wireless performance. That’s usually not conveniently close to an outlet.

You can also make use of PoE VoIP (Voice over IP) phones, which is perfect, because those phones also use data over Ethernet to communicate. Ironically, this brings VoIP up to analog phone convenience, because, of course, phones also get their power from the phone line.

Brand

StarTech.com

Length

125ft

This extra long StarTech Cat-6 cable is a high-quality Ethernet cable that supports up to 10Gbps data transfer speeds.


Modern PoE can run surprisingly power-hungry devices

Going beyond a switch

Removing the Ring Battery Doorbell from the wall. Credit: Ring

The PoE standard allows for 15W of power, and with power loss over the cable there’s about 13W left for devices. That’s not bad, and devices like smart doorbells, intercoms, and SBCs like the Raspberry Pi can be powered this way.

That was the starting point, but with subsequent PoE revisions, the power level has gone up to 30W, 60W, and as much as 100W. Of course, there’s still power loss over the cable, so you might only get 70W out on the other side, but this really expands the types or number of devices you can run.

Just keep in mind that your PoE power source, such as a big powered switch, still has to split its power across multiple Ethernet lines. If the switch can put out 150W in total, then it doesn’t matter that each individual port is rated at 100W. The total budget is still just 150W.

There are also POE to USB-C converters, which really makes this a versatile power delivery system. There are many more devices that accept USB power than Power over Ethernet, and now you don’t have to choose.

Why power over Ethernet is safer than extension cords

Especially that really old one covered in dust

Person holding the CableGeeker ethernet cable for gaming lit by wall leds. Credit: Hannah Stryker / How-To Geek

Because power is centrally managed through a PoE switch, every connected device benefits from built-in protection against overloads, short circuits, and power faults. If something goes wrong, the switch can shut off power to that individual port without affecting the rest of the network.PoE switches usually allow admins to cycle power, so you can remotely restart devices without having to unplug anything.

However, you should be careful when using “passive” PoE (as explained by Netgear) since passive systems don’t negotiate power levels, and it’s possible to damage a PoE device if a passive system gives it too much power. Passive PoE is not an official part of the standard, hence the warning. However, the active systems that you’re most likely to find today solve this issue. Some specialized equipment might still use passive PoE, but you should almost certainly avoid it.


Is your network ready for PoE?

It’s pretty easy to get started with PoE. Most people just start with a PoE switch, which is where the power comes from. However, if you already have a non-PoE switch, and you only need to power one or two gadgets, you can use a PoE injector to add power to specific lines without replacing your entire switch.

The good news is that most existing Ethernet cabling already supports PoE. Cat5e, Cat6, Cat6a, and newer cable standards all work perfectly well, although higher-quality cabling handles higher power levels and heat more effectively, especially over longer cable runs.

PoE is a great technology to invest in, especially as smart home tech and small devices that can run from PoE or USB converted from PoE become ever more numerous.



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ZDNET’s key takeaways

  • Staff who use AI can end up with more to do, not less.
  • Think carefully about the tools you’re using and why.
  • Adopt a set of standards and refine your outputs.

The promise of productivity boosts from AI can come with an unwelcome side order of stress. Harvard Business Review found that AI doesn’t reduce work; it intensifies it, leading to cognitive fatigue and unsustainable hours.

While the common perception is that AI can help reduce workloads, allowing employees to focus more on higher-value and more engaging tasks, HBR’s research found that staff using AI worked more quickly and often ended up with more to do, not less.

Also: Forget productivity: Here are 5 strategic shifts that drive real AI value

While we’ve written about how some professionals are finding ways to turn AI’s time-saving magic into a productivity superpower, we’ve also recognized that some employees have started to become tired with the low quality of AI outputs.

Ankur Anand, group CIO at tech recruiter Harvey Nash, said professionals who want to avoid cognitive fatigue must understand how to use AI effectively and its potential risks.

“That focus will help to reduce the noise around the workload that AI creates,” he told ZDNET, suggesting that many people have unrealistic expectations about the productivity boost that AI will provide.

Also: Why I ditched Copilot for Claude in Word, Excel, and PowerPoint – and how you can, too

“Many organizations are telling their people, ‘We want to understand how you’re making an impact with AI,'” he said. “But these professionals are not empowered, which means that using AI adds a lot of pressure, because they need to prove themselves on their own terms.”

If you’re going to make the most of AI at work, then you’re going to have to find an effective balance between completing tasks quickly and producing high-quality work. 

Here’s how the experts believe professionals can ensure they reap the benefits, not the problems, of AI — and they suggest that you’ll need to focus on three core areas: tools, guidelines, and outputs.

Limit your toolset

Alex Read, senior enterprise product manager for data at energy provider EDF UK, told ZDNET that the best way for professionals to reap the benefits, not the challenges, of AI is to be uber-focused on tools that help you produce value in your roles.

While there are thousands of potential AI-enabled services on the market, Read said sensible professionals limit their horizons.

Also: How this travel company’s AI rollout drove a 73% satisfaction boost: A 5-step playbook for your business

In his own role, for example, Read focuses on how AI can help him build a data platform and update information accurately, efficiently, and productively: “Anything outside of that scope is noise for me.”

That sentiment resonated with Nick Pearson, CIO at technology specialist Ricoh Europe, who told ZDNET it’s important to take a step back and think carefully about how an AI tool can help you produce value in your role.

“If you think about the phrase ‘gen AI,’ the tech is very good, by definition, at generating outputs,” he said. “I could go to bed in the evening, set the model to work, and we could have four new IT strategies produced overnight.”

Also: Worried AI agents will replace you? 5 ways you can turn anxiety into action at work

However, quantity doesn’t necessarily mean quality. Pearson suggested it’s important to focus on AI’s blind spots, particularly as most models are trained on preexisting content.

“AI can’t inspire people, per se; it can’t naturally create something new, because it’s actually quite recursive,” he said.

“And the judgment you have to put in sometimes, on top of everything else, whether it be an ethical or a capability judgment, is not there automatically in the technology.”

It’s in this gap, said Pearson, that human experts play a critical role: “We’re toying with that concern as an organization and saying, ‘Where does AI really play an important role, versus where are we upskilling people in areas that AI probably won’t play for a long time?'”

Work to the guidelines

HBR’s research found that an initial productivity surge when AI is adopted can lead to lower-quality work, turnover, and other problems as people work harder rather than smarter.

To correct this issue, HBR said companies need to adopt an “AI practice,” or a set of norms and standards around AI use that help professionals ensure they use AI in a constrained but productive manner.

Also: 90% of AI projects fail – here are 3 ways to ensure yours doesn’t

At EDF UK, Read is part of an internal AI Center of Excellence in enterprise IT, which enables policy for the effective use of AI across the wider organization. 

In addition to Read, who contributes input from a data-use perspective, the group includes other tech representatives, such as the firm’s senior manager of AI, principal software engineer, and principal solution architect.

“The remit of this center is to make sure that, when the federated business units are looking to build, develop, and deploy AI services, they have platforms, guidance, best practices, architectural assets, and materials to guide them on how to safely and efficiently adopt AI and operationalize it at scale,” he said.

Some of the key themes the center considers when assessing AI tools are scalability and reusability, ensuring a proposed service doesn’t replicate one already in use.

Also: 5 ways to use AI when your budget is tight

“All new tools and services related to AI will go through that hopper and funnel to understand scope and ensure the security, regulatory, and ethical side of things are understood,” he said, suggesting that all professionals should use their organization’s pre-existing guidelines to foster an appropriate exploitation of emerging tech.

“The benefit that guided approach brings is that it allows us to be clear in our messaging around what AI services can be used, how they’re used from a use-case perspective, and ultimately, what personas are allowed to use them.”

Refine your outputs

Even when tools are assessed and considered acceptable, there can still be an overreliance on AI outputs. Worse, some professionals can drown in the insights they receive, leading to higher stress and fewer benefits.

Louise Newbury-Smith, head of UK&I at technology specialist Zoom, told ZDNET that one way to ensure your outputs are constrained is to focus on prompting.

“Use simple amendments to be specific, such as ‘Give me the top three things with the biggest impact.’ That approach should guide your prompt, rather than saying, ‘Give me everything you know about this topic.'”

Also: 5 ways to fortify your network against the new speed of AI attacks

Newbury-Smith said the successful use of AI is all about being smart about how it’s exploited, and that effectiveness comes down to enablement and engagement. If a prompt yields too much information, refine it until you get what you need. She said this should still be faster than trying to get answers without AI.

The basic message for professionals is that effective applications of AI are all about you staying in the loop, said Bernhard Seiser, vice president of digital, data, and IT at AOP Health.

Think before you use AI, and think again before you push your outputs around the organization.

“It doesn’t help the business if you get AI-generated emails that are many pages long, and then you need ChatGPT to summarize the text,” he told ZDNET.

Seiser said that while there are certain tasks generative AI is good at and worth using for, in the end, “you need to use your brain.”





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