Telstra Speed Test — NBN & 5G Home Internet

Telstra is not just Australia's biggest internet provider — it is the provider that most Australians measure every other ISP against. Whether that reputation is entirely deserved in 2026 is debatable, but one thing is not: when it comes to raw NBN performance, Telstra consistently delivers the fastest typical evening speeds as measured by the ACCC's independent Measuring Broadband Australia reports.

You are paying a premium for Telstra. The question this speed test answers is whether that premium is translating into actual performance at your address, or if you are leaving money on the table.

The Blue Light Problem — And Why Your Speed Test Shows 25 Mbps

This is the single most common Telstra speed complaint, and it has a simple explanation. The Telstra Smart Modem has a single front-facing LED that tells you everything:

• 🟢 Green light — You are connected to NBN. Speeds should match your plan.
• 🔵 Blue light — Your NBN connection dropped and the modem has automatically switched to Telstra's 4G mobile network. Speeds are capped at roughly 25/5 Mbps.
• 🔴 Red light — No connection at all. Neither NBN nor 4G is working.
• 🟠 Orange (flashing) — The modem is starting up or downloading a firmware update. Give it 5-10 minutes.

If your speed test just showed 20-25 Mbps and the light is blue, your NBN is down. The 4G backup is keeping you online — it is one of Telstra's genuine advantages — but it is not designed for full-speed use. Open the My Telstra app to check for known outages in your area. If no outage is listed and the light has been blue for more than 24 hours, call 132 200.

Smart Modem Gen 2 vs. Gen 3 — Which One Do You Have?

Telstra has shipped two Smart Modem generations, and the difference matters more than their marketing suggests:

If you are paying for NBN 100 or higher but using the Gen 2 modem, your Wi-Fi could be the bottleneck. The Gen 2's Wi-Fi 5 radio struggles to push more than 300-400 Mbps to even nearby devices. Call Telstra and ask for a Gen 3 upgrade — they often provide this free on higher-tier plans or during retention conversations.

What Every Telstra Plan Should Actually Deliver

Telstra publishes ACCC-compliant typical evening speeds for each plan. Here is what real-world testing shows versus what you are paying for:

Notice the "Wi-Fi Reality" column — that is what you will actually see on a speed test running from a phone or laptop over Wi-Fi. The ACCC numbers are measured on wired Ethernet. If your Wi-Fi result is between 60-80% of the ACCC figure, your connection is performing normally. It is not the NBN or Telstra that is slow — it is the wireless link between your device and the modem.

The Real Reason Telstra Costs More

Every NBN retailer buys access to the same physical NBN infrastructure. The fibre, copper, HFC cables, and NTD boxes are identical whether you are with Telstra, Optus, or TPG. So what are you actually paying extra for?

CVC (Connectivity Virtual Circuit) allocation. Think of CVC as a pipe connecting your neighbourhood to the internet backbone. Each RSP buys CVC capacity from NBN Co. When peak-hour demand exceeds CVC capacity, speeds drop. Telstra purchases more CVC per customer than most competitors, which is why their evening speeds remain closer to the plan maximum. Budget ISPs buy less CVC to keep prices low, which means more noticeable slowdowns at 8 PM when everyone is streaming.

4G backup at no extra charge. The built-in mobile backup is genuinely valuable during NBN outages — especially if you work from home. Optus also includes this. TPG does not on standard plans.

Faster support response. Telstra's technical support, while not perfect, typically responds faster than budget RSPs. The My Telstra app can remotely restart your modem, run diagnostics, and book a technician appointment without waiting on hold.

Smart Wi-Fi Boosters and Mesh Coverage

Telstra sells Smart Wi-Fi Boosters as add-ons to extend coverage throughout larger homes. These are essentially mesh nodes that pair with the Smart Modem to create a unified network. They sit on shelves or tables (no wall mounting required) and backhaul wirelessly.

Some practical advice on placement:

• Place boosters halfway between the modem and the dead zone — not at the edge of the dead zone. They need decent signal from the modem to have anything to repeat.
• Avoid putting them inside TV cabinets or behind thick walls. Line of sight to the main modem (or at most one wall between them) is ideal.
• For homes with double-brick or concrete internal walls (common in 1960s-80s Australian construction), wireless mesh struggles. Consider running an Ethernet cable between the modem and booster, or using Ethernet backhaul mesh systems instead.

If you have three or more stories, or your home exceeds 250 square metres, dedicated mesh systems (like the TP-Link Deco X55 or ASUS ZenWiFi AX) connected to the Smart Modem's LAN port will outperform Telstra's boosters — at the cost of losing the integrated management through the My Telstra app.

FTTN Customers: Checking Your Real Line Speed

If your home has an FTTN connection (check at nbnco.com.au), your broadband runs partly on copper and your maximum speed is dictated by the length of that copper run. Telstra cannot change this, and no modem or plan upgrade will fix it.

To check your actual line capability:

1. Log in to 192.168.0.1 with username admin and the sticker password
2. Look for Broadband or DSL Status in the menu
3. Find the "Downstream Line Rate" or "Sync Speed"

This number is your copper line's maximum. If it shows 55 Mbps, paying for an NBN 100 plan is wasting money — you will never exceed 55 Mbps. Drop to the NBN 50 plan and pocket the savings. Alternatively, look into NBN's Technology Choice program to upgrade to FTTP (full fibre), which removes the copper bottleneck entirely.

Telstra 5G Home Internet — An Alternative to NBN

In areas with Telstra 5G coverage, their 5G Home Internet product uses a dedicated 5G modem instead of the NBN network. Real-world performance varies wildly depending on your distance from the tower and local congestion, but customers in strong coverage areas report 100-400 Mbps downloads with 15-30 ms latency.

The appeal is simple: no technician visit, no installation appointment, plug it in and go. If you have been waiting weeks for an NBN appointment or if your FTTN connection is stuck at 30 Mbps, 5G Home Internet may deliver a genuinely better experience.

The risk is variability. A 5G tower that serves you 300 Mbps today might serve you 80 Mbps during a busy Saturday evening if the tower is congested. Unlike fibre, there is no dedicated line — you share tower capacity with mobile phone users in your area.

How Telstra Compares to Other Australian Providers

• Optus is Telstra's main rival, typically $10-15/month cheaper with similar features (4G backup, mesh pods). Optus also offers 5G Home Internet and Game Path for gamers. Their ACCC evening speeds are close to Telstra's but slightly lower on some tiers.
• TPG is the budget choice, often $20/month cheaper than Telstra. No 4G backup on standard plans and customer support can be slow, but the underlying NBN performance is usually fine if CVC is adequate in your area. Now part of TPG Telecom alongside Vodafone AU, iiNet, and Internode.
• Aussie Broadband is the enthusiast favourite. Australian-based support, transparent CVC monitoring, and consistently top-tier ACCC results. Priced between TPG and Telstra. If you care about support quality but not about 4G backup, Aussie Broadband may be the best value in Australian broadband.
• Superloop owns international fibre backbone infrastructure to Southeast Asia, which gives them optimised routing for gaming and streaming from overseas servers. Competitive pricing and growing rapidly.

Straight Answers to Common Telstra Questions

Is Telstra's NBN actually faster than TPG's NBN?

At the physical layer, no — both use the same NBN wires to your house. The difference is how much CVC bandwidth each buys. In ACCC testing, Telstra's typical evening speeds are consistently 2-5% closer to the plan maximum than budget providers. Whether that small difference justifies a $20/month premium depends on your priorities.

Why is my speed fine in the morning but slow at night?

Two possible causes: CVC congestion on Telstra's side (less common with Telstra than budget ISPs), or Wi-Fi congestion in your neighbourhood as everyone's routers compete for the same wireless channels between 7-11 PM. Try testing on Ethernet at night — if wired speed is fine but Wi-Fi is slow, the problem is wireless interference, not your NBN connection.

Can I get the Smart Modem Gen 3 if I'm on the cheapest plan?

Telstra may supply the Gen 2 on lower-tier plans. You can usually request the Gen 3 — call and ask. If they say no, consider upgrading to a higher plan tier for one billing cycle, receiving the Gen 3, then downgrading again. The modem stays with you.

What's the Telstra support number?

Call 132 200 for technical support. The My Telstra app (iOS/Android) is faster for basic issues — it can restart your modem remotely, run connection diagnostics, check for outages, and book technician visits. Online chat at telstra.com.au is also responsive during business hours.