- ADSL runs over copper from the exchange; FTTC uses fibre to the street cabinet and copper only for the final stretch, which is much faster.
- You can check FTTC availability with an address-level checker before ordering.
- Many FTTC upgrades are self-install with no engineer visit, using a new router and a faceplate.
- FTTC speeds stabilise over a training period of around ten days as the line management system optimises the connection.
Upgrading from ADSL to fibre-to-the-cabinet, FTTC, is one of the most worthwhile broadband changes a household can make, often multiplying speeds several times over. For most people it is also surprisingly painless. Knowing what is involved removes the hesitation that keeps some households on slow, dated connections far longer than necessary.
What changes technically
ADSL carries your broadband over copper all the way from the telephone exchange, and speed falls sharply with distance. FTTC runs fibre to the green street cabinet near you and uses copper only for the short final hop to your home. Because the copper distance is far shorter, FTTC delivers substantially faster speeds, which is why the upgrade is so often transformative.
Checking eligibility
FTTC depends on your cabinet having been upgraded. Use an address-level availability checker to confirm FTTC is available to your line before ordering. If the checker shows it, you can order it; if it does not, your cabinet may not be enabled, and full fibre may be the better path to pursue instead.
The ordering and install process
Ordering FTTC is straightforward, and many upgrades are self-install. The provider sends a compatible router, you connect it, and the service is switched at the network end on the activation date, often without an engineer needing to visit. Where an engineer is required, the provider will tell you in advance.
The upgrade at a glance
| Step | What happens |
|---|---|
| 1. Check | Confirm FTTC availability at your address |
| 2. Order | Place the order and set an activation date |
| 3. Equipment | Receive and connect the new router |
| 4. Activation | Service switched at the network end |
| 5. Stabilise | Speed settles over a training period |
Why speeds settle over time
Do not judge your FTTC speed on day one. The network's line management system spends the first days, commonly around ten, learning your line's characteristics and balancing speed against stability. Speeds can fluctuate during this training period and usually settle afterwards. If the connection is still below your minimum guaranteed speed once it has stabilised, then it is time to raise a fault.
Frequently asked questions
How do I upgrade from ADSL to FTTC?
Check FTTC availability at your address, order it from a provider, connect the new router they send, and let the service switch on the activation date. Many FTTC upgrades are self-install with no engineer visit required.
Will my speed improve if I upgrade from ADSL to FTTC?
Usually significantly. ADSL carries broadband over copper all the way from the exchange, with speed falling over distance, while FTTC uses fibre to the street cabinet and copper only for the short final hop, delivering much faster speeds.
Do I need an engineer visit to upgrade to FTTC?
Often not. Many FTTC upgrades are self-install, where you simply connect a new router. Where an engineer visit is needed, the provider will tell you in advance and arrange an appointment.
Is there a cost to upgrade from ADSL to FTTC?
There may be a setup or activation charge and a new contract, though promotions sometimes waive upfront fees. Compare the total cost including any upfront charges against the speed improvement before ordering.
How long does it take for FTTC speed to stabilise?
Typically around ten days. During this training period the network's line management system learns your line and balances speed against stability, so speeds can fluctuate before settling. Judge your speed after it has stabilised, not on day one.
