Sky Internet Calls is Sky's digital landline, and it behaves nothing like the copper phone line it replaces. The handset now plugs into the back of the Sky hub, the wall sockets go quiet, and after a full fibre switch the phone can lag a day or more behind the broadband. That gap is where most of the panic happens: the internet works, the phone does not, and nothing on the hub explains why. This guide covers where the phone actually plugs in on the Sky Broadband Hub and the white Max Hub, the activation and number porting delays Sky allows for, the full no dial tone ladder, and the honest limits of a landline that dies with the power.
Sky Internet Calls runs your landline through the Sky hub, so the phone must plug into the phone socket on the back of the hub, not the wall. No dial tone is usually fixed by reseating that cable, restarting the hub and ONT together, and waiting out activation, which can take 24 to 72 hours after a full fibre switch. A steady voice light on the Sky Broadband Hub means the service is registered.
Key Takeaways
- Sky Internet Calls carries the landline over broadband, so the handset plugs into the phone socket on the back of the Sky Broadband Hub or Sky WiFi Max Hub and the old wall sockets go dead for voice.
- No dial tone straight after a full fibre switch is usually an activation lag; Sky allows up to 24 hours for the phone service, and number ports can stretch the wait to around 72 hours.
- The black Sky Broadband Hub (SR203) has a dedicated voice light that shows whether calls are registered, while the white Sky WiFi Max Hub (SR213) has a single LED with no separate voice indicator.
- Restarting the ONT and the hub together, then checking the phone lead sits in the correct socket rather than the purple DSL port, clears most dial tone failures without a call to Sky.
- Internet Calls stops working in a power cut, so anyone who depends on the landline should ask Sky for a free resilience solution and read up on the Ofcom rules before an outage proves the point.
Sky Broadband Hub (SR203) Voice Light Meanings
| Light | What it means | What to do |
|---|---|---|
| Steady (on) | Internet Calls is registered and the line is ready to make and receive calls. | Nothing to do. If there is still no dial tone, check the handset, its lead and the socket it is plugged into. |
| Flashing green | An incoming call is ringing on the line. | Nothing to fix; the light returns to steady once the call ends. |
| Amber | Broadband is up but the voice service has not registered with Sky's platform. | Restart the hub and allow five minutes. If amber persists past 24 hours, run the phone diagnostic at sky.com/help and report a fault. |
| Off | No voice service is active on the hub, either still provisioning after a switch or not part of the package. | Check the account includes Sky Talk, allow up to 24 hours after activation, then contact Sky if it stays off. |
Sky Internet Calls Moves Your Landline Onto the Broadband Line
Sky Internet Calls is Sky's name for a digital landline, sometimes described as Sky VoIP. Instead of a voice signal travelling down a copper pair, your calls travel over the broadband connection, and the Sky hub does all the conversion between the ordinary telephone handset and the internet. Sky provides Talk as Internet Calls as standard on full fibre and on some part fibre products, and its own help pages confirm that traditional Talk is closing in line with the UK-wide analogue switch-off, due by 31 January 2027.
The quickest way to tell whether you have it is the plug test. If the home phone only produces a dial tone when it is connected to the back of the Sky hub, you are on Internet Calls. If your broadband is Sky Full Fibre, you are on Internet Calls by default, because there is no copper voice path into the property at all.
The same shift is happening at every UK provider under different names, and the fixes rhyme across all of them. The wider Digital Voice not working guide covers the equivalent ladders for BT, EE, Virgin Media and Vodafone if you are troubleshooting a different household.
The Phone Plugs Into the Hub and Not the Wall Socket
Once Internet Calls is active, the telephone wall sockets around the house stop carrying dial tone. Any extension sockets go dead too. The handset, or the base station of a cordless phone, must plug directly into the phone socket on the back of the Sky hub.
The two hubs differ, so match the instructions to the model. The black upright Sky Broadband Hub (SR203) carries two telephone sockets on the rear: a standard UK BT-style socket that accepts the plug from your existing phone, and a smaller RJ11 handset socket that Sky uses for its services in Ireland and Italy. UK customers should use the BT-style socket, which means the phone plug that lived in the wall moves straight across with no adapter. Do not force a phone plug into the purple RJ11 socket, which is the DSL broadband port used on copper connections and has nothing to do with the phone. The white Sky WiFi Max Hub (SR213) has a phone port on the rear alongside four Gigabit Ethernet ports and a DSL port; on full fibre the hub feeds from the ONT over Ethernet and the DSL port does nothing.
One confusion is worth killing directly. Internet Calls does not run over WiFi. The handset connection is a physical cable into the hub, and WiFi calling is a separate Sky Mobile feature for mobile phones. Cordless handsets keep talking wirelessly to their own base station exactly as before; only the base needs to sit at the hub.
Activation After a Full Fibre Switch Takes Up to 24 Hours and Sometimes Longer
On switch day the broadband activates first, and Sky says the hub can start working at any time up to midnight on the activation date. The phone service follows, and Sky's own setup guidance allows up to 24 hours after broadband for Internet Calls to be fully activated. Sky Community staff describe a landline that lags a day behind the broadband as normal rather than a fault.
Two things stretch that window. A number port from another provider, or from an old copper line, can take a few days to release through Openreach, which pushes a working phone out to around 72 hours. There has also been a known issue on the white Max Hub that delayed voice activation for some customers, so a silent phone port on a brand new SR213 is not automatically broken hardware.
Give the hub a restart once the broadband has settled, because a reboot forces it to pull down its voice settings. If the phone is still dead after 48 hours, a factory reset is the recognised next step: hold the WPS button on the Max Hub for a full 30 seconds, or press the recessed reset hole on the SR203 for about ten seconds. After the reset, leave the hub 10 to 15 minutes to reprovision before judging the result.
The No Dial Tone Ladder Runs From Quick Checks to a Fault Report
Work down this ladder in order, because each step rules out the most likely remaining cause.
- Confirm the broadband works. Internet Calls cannot run over a dead connection, so check the hub's main light first; the Sky Broadband Hub lights guide decodes every state for both hubs. Fix broadband before touching the phone.
- Check the phone lead. It belongs in the BT-style telephone socket on the SR203 or the phone port on the Max Hub, not the purple DSL socket, not an Ethernet port and not the wall.
- Restart the ONT and the hub together. Switch both off at the mains, wait 30 seconds, power both back on and give the hub five minutes to register the voice service.
- Read the voice light on the SR203, using the table below. On the Max Hub there is no voice light, so make a test call to the landline from a mobile instead.
- Swap the handset. Try a different phone, check a cordless base has power, and remove any splitters, extension reels or old microfilters from the chain.
- Check Sky's service status page and run the phone diagnostic under Fix problems with your phone at sky.com/help while signed in to your Sky iD.
- Report the fault. If the voice light stays amber or off after all of the above, the fix is provisioning on Sky's side, not anything in the house.
The hub admin panel at 192.168.0.1 is also worth a look to confirm the hub itself is healthy; the Sky Hub login guide covers the username and password for every model.
The Sky Broadband Hub Voice Light Tells You Where the Fault Sits
The black Sky Broadband Hub (SR203) gives you a genuine diagnostic that the newer hub lacks: a dedicated voice light. When Internet Calls registers correctly the light sits steady, it flashes green when a call is ringing in, and it turns amber when the broadband is up but the voice service has failed to register, which is the classic state after a hub has restarted faster than Sky's voice platform could follow. Off means the hub has no active voice service at all, which points at the account or at activation rather than at cables.
The white Sky WiFi Max Hub (SR213) rolls everything into one LED and has no separate voice indicator, so the light can glow a healthy white while the phone service is dead. On that hub the only honest checks are a test call from a mobile and the diagnostic at sky.com/help. The table below decodes the SR203 states and the fix for each.
Number Porting Delays Explain Calls That Fail in One Direction
Keeping your number is requested when you sign up, and Sky says it will port a number where it can and will tell you before you commit if it cannot. The port itself completes after the broadband goes live, and while it is in flight the service can behave oddly rather than being cleanly dead.
A half-finished port classically fails in one direction. Outgoing calls work but show a temporary or unfamiliar number to the person you ring, or incoming calls to your old number fail while outgoing calls are fine, because callers are still being routed towards the old line until Openreach releases the number. Both patterns normally clear within a few days of activation.
Two situations deserve a fast phone call to Sky rather than patience. If outgoing calls still present the wrong number after 72 hours, report it, because that usually means the port has stalled. And if your order notes say a new number will be provided when you asked to keep the old one, challenge it before the switch happens: once the old line is ceased, a lost number becomes progressively harder to recover, and community threads are full of long-held numbers that vanished this way.
A Power Cut Silences Internet Calls, So Plan Ahead
The old copper network powered the phone from the exchange, which is why a basic corded phone kept working in a blackout. Internet Calls has no such trick. The hub and the ONT both run on mains power, so in a power cut the landline stops completely, including calls to 999.
Ofcom requires providers to offer customers who depend on the landline a free solution, such as battery back-up or a mobile alternative, that gives at least one hour of access to emergency calls in a power cut. If anyone in the household has no mobile, poor mobile signal or a telecare alarm that dials out over the phone line, tell Sky before the switch rather than after, and mention any accessibility needs so the right team handles it.
The full picture, including what the rules actually oblige Sky to provide and the battery back-up options that keep a hub and ONT alive, is covered in the digital landline power cut rules guide.
The Sky Hub Stays Because Third Party Routers Cannot Carry Internet Calls
An honest caveat before anyone plans a tidy own-router setup: Sky does not publish the configuration details for Internet Calls, and no third party router or analogue telephone adapter is known to carry the service. The voice line only registers through Sky's own hubs, which means the SR203 or SR213 has to stay powered and connected for the landline to work.
That does not stop you improving the WiFi. You can run your own router or a mesh system behind the Sky hub and leave the hub doing broadband and phone duty, which is the practical compromise for most homes. What you cannot do is retire the Sky hub to a drawer and expect a dial tone, the way an own-router setup can on a data-only line.
If the phone works but the settings side of the hub is the mystery, the Sky Hub login guide walks through the admin panel, and the wider Digital Voice not working guide covers the same landline problems on every other UK provider.