No BT broadband, reason?

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Hi.

Got a new BT broadband infinity 1 last month, work great till stopped working on Thursday 7th and still no broadband. Rang a lot of time to BT. They saying there is a fault on line between their exchange and their socket in my house. An engineer is coming around to fix it.

The question is how can there be a fault if my phone still work okay? Does broadband come on the same line as phone?

How does they find the fault in million miles of cable, wires etc?

Can anyone explain to me how broadband work on phone line?

Cheers Daniel.
 
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The phone and broadband share the same pair of wires.

Like a radio can be tuned to difference frequencies to liisten to different stations the phone and the broadband use different frequencies.

The phone works on frequencies between 0 and 4000 Hz,

The phone works on frequencies above 100,000 Hz

The equipment that produces the broadband frequencies is not the same as that which carries the phone signals.
 
I'm a BT Openreach Broadband engineer. To explain how broadband works would take a few hours, and pages to explain in full.

Did you have a more specific question?

edit, Bernard has explained it pretty well, but he meant to put ASDS/VDSL on the higher frequencies... ;)
 
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The question is how can there be a fault if my phone still work okay?
Different frequencies are affected differently by faults. So it's possible for a fault to badly impact broadband while leaving the much lower voice frequencies usable. The reverse can happen too, some faults (such as a connection that is almost but not quite making contact and effectively acting as a capacitor or sometimes a line where one side is open circuit) will block the DC and low frequencies used by phones but allow at least some signals to pass at the higher frequencies used for DSL.

Having said that if voice is working II think it's far more likely that there is a fault with the DSLAM in the cabinet than a fault with the wiring

Does broadband come on the same line as phone?
On traditional ADSL packages the same wires carried the phone and broadband from the phone exchange to your house.

On the new FTTC VDSL services (branded as infinity by BT, branded as "fibre" by many providers). The same wires carry the phone and broadband from your house to the "fibre cabinet". At the Fiber cabinet the signals are split. The phone signals continue to the exchange on the tradtional copper phone line while the broadband interface is handled in the cabinet. Data travels between the phone exchange and the fibre cabinet over a fiber optic link.

How does they find the fault in million miles of cable, wires etc?
While they do have some specialist tools afaict they mostly rely on testing segments of the line until they find the bad one.
 
Cheers thanks.

The engineer is coming tomorrow to fix it, hopefully I get the broadband back.

BT has warned me that there is a fee of £130 if there is a fault on my internal wiring but I fine it impossible as my phone work and is connected direct to test socket on their box outlet and broadband is connected as well with a filter. So if my phone work ok, does it mean there is a fault on their exchange somewhere?

Daniel
 
So if my phone work ok, does it mean there is a fault on their exchange somewhere?

Daniel
Faulty equipment in your house could cause loss of broadband for one.

No equipment fitted on site. Only the BT socket, filter ( tried 3 filters ), 2 hubs and brand new phone, phone disconnected to check, same thing.

No extension fitted.

Daniel
 
So if my phone work ok, does it mean there is a fault on their exchange somewhere?

Daniel
Faulty equipment in your house could cause loss of broadband for one.

No equipment fitted on site. Only the BT socket, filter ( tried 3 filters ), 2 hubs and brand new phone, phone disconnected to check, same thing.

No extension fitted.

Daniel
I would classify a hub as equipment, but you have tried 2 so that would be eliminated.

Presume you tried replacement cables?
 
I would classify a hub as equipment, but you have tried 2 so that would be eliminated.

Presume you tried replacement cables?

Yes, 3 cables, all known working at my brother's broadband.

BT's socket - filter ( where phone plugged in as well ) - cable - Hub - wifi - laptop.

Hub has red flashing B mean no broadband.

Daniel.
 
You seem to have eliminated everything your side of master socket so cannot see how they can manage to find a reason to bill you for anything.

Don't forget to post up what Openreach find. All good for learning curve.
 
Broadband working!

Cause is contractor working in exchange cabinet got connection the wrong way with other fibre cables two weeks ago.

Filter is fitted between bt socket and hub with phone connected to filter as normal practice.

Daniel.
 

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