SCHNAP Logo

Making Trade Life Easy!

RJ45 Jack

13/11/2025
by Rick Coleman
RJ45 Jack

G'day! Sick of your Wi-Fi dropping out in the middle of a Zoom call or right at the end of the footy? Wi-Fi is handy, mate, but for a rock-solid, high-speed connection for your smart TV, gaming console, or home office PC, you just can't beat a proper hardwired connection.

And that all starts with the humble RJ45 jack. It's that little square data port on your wall plate, and it's the fair dinkum gateway to a fast, reliable internet experience.

So, What is an RJ45 Jack, Exactly?

An RJ45 jack (or 'Ethernet socket', 'data point', or 'mech' as tradies call it) is the "female" port that your Ethernet cable (the one with the little clear RJ45 plug) clicks into.

Its one and only job is to be the termination point for the data cable that's running through your walls. It connects that hidden cable back to your NBN modem or a central network switch, giving you a physical, high-speed 'tap' into your home network, right where you need it.

The Ripper Benefits: Why a Hardwired Jack Beats Wi-Fi

In a country as big as ours with houses built of solid brick, Wi-Fi can be a proper nightmare. A hardwired RJ45 jack solves all those dramas.

  • Blazing Fast Speeds: You'll almost always get a faster, more consistent speed than on Wi-Fi. Perfect for 4K streaming or downloading big files.
  • Rock-Solid Reliability: No more random dropouts. A physical cable connection doesn't care if your neighbour fires up their microwave or if you've got thick brick walls.
  • Lower Latency (Ping): This is the big one for gamers. A wired connection gives you a much lower, more stable ping for a lag-free experience. You can't blame the connection when you miss that shot!

The Big Confusion: RJ45 vs. That Old Phone Socket (RJ11)

This is the bit that catches people out. An RJ45 jack looks like the bigger, beefier brother of the old telephone socket.

  • RJ45 (The Internet Socket): This is the wide one, with 8 internal pins. It's for data and networking (Cat6).
  • RJ11 (The Old Phone Socket): This is the skinny little fella, with usually 4 or 6 pins. It's only for old-school landline telephones.

They look similar, but they're not interchangeable. You can't plug your NBN cable into an old phone jack.

The CRITICAL Safety & Compliance Warning: This is NOT a DIY Job, Mate!

Righto, let's get dead serious for a sec, because this is the most important part of the whole article.

Buying a pre-made Ethernet cable (a 'patch lead') to run outside your walls from the RJ45 jack to your computer? That's a "go for your life" DIY job. Too easy.

But what if you want a new data point in your study? This involves running a new data cable inside your walls, floor, or ceiling and terminating it at a new RJ45 jack.

In Australia, this is strictly not a DIY job. Any fixed data, communications, or telephone cabling must be installed by a licensed cabler (registered with ACMA).

Why? It's the law, mate. A dodgy data install (especially with cheap parts from a non-specialist supplier) can create interference (messing up your and your neighbour's NBN). Worse, if it's run too close to 240V power wiring without proper separation, it can become a serious electrical hazard. Don't be a galah.

A Professional Job Needs Professional Gear

A licensed cabler or licensed electrician knows that a rock-solid, high-speed network relies on high-quality, compliant components from end to end. They can't risk a job on a cheap, dodgy RJ45 jack that will fail in a year.

This is why they source their gear from a trusted electrical wholesaler. As one of Australia's most comprehensive electrical wholesaler and supplier networks, Schnap Electric Products stocks the lot for the professional installer. They've got a massive range of high-quality, professional-grade data gear, including RJ45 jack mechanisms ('mechs'), wall plates, Cat6 data cable, patch panels, and all the specialist crimping and testing tools that a qualified professional needs to do the job right, compliant, and ready for high-speed Aussie internet. For a connection that won't let you down, the pros start with quality gear from a supplier like Schnap Electric.