Broadband dropping when telephone call received

Dave_C_2

If you have faulty internal house wiring and call out BT, then you will face a hefty bill. To eliminate the internal wiring you must do a clean socket test.

Detailed here

Assuming that is still giving the same problems then it's a fault with the line. Now call your ISP and report a line fault

To be precise, you only need a filter in a socket if there is something plugged into it, such as a phone, Skybox etc.. You don't need a filter on an unused socket.

Aside but related

You don't normally need the bell wire on internal wiring to extensions as the ADSL filters usually have the ringing capacitor inside them

Removing the bell wire is detailed here. Not applicable if you have a BT iplate or filtered main socket. Also not for infinity.

Quiet line test

From your phone dial 17070 then choose option 2
It will say quiet line test end the line should be quiet.
If it's noisy (crackles) unplug everything except the phone and repeat
It it's still noisy try it in the master socket - use another phone as well
If it's still noisy report it as a phone line fault - it will get fixed quicker.

Dave

Dave_C_2

J_B wrote: »

I can't find it now, but there was a discussion in uk.telecom.broadband a while back and it turned out to be a line fault.
The 'bell' wire was touching one of the others so, whenever the phone rang, it short circuited the system!

<Pedant>
Not quite. The wire coming into your house is just the single A/B pair (it may be a multi-pair wire but only one pair is connected). There is no bell wire at this stage
In the master socket there is a ringing capacitor (and resistor) across the A/B pair which generates the ring voltage. This is output at the master socket as the bell connection on the krone strip where the internal wiring is to be connected. All of this is done on printed Circuit Boards.

Pins 2 and 5 = A and B, pin 3=bell pins 1,6 and 4 not used.

The bell wire only exists on internal house wiring after the master socket and is the responsibility of the customer, not BT

</Pedant>

skylight

We had the same problem last year. Had SKY TV whilst BB and phone were via BT. BT were unable to help, they kept telling me it was my problem with the equipment. I ended up moving calls and BB to SKY too, and have not had a single problem since. So I guess it was either the line or the BT BB box that had a fault.

Taiko

Just wanted to update on this, as the issue seemed to be fixed now.

I had tried the information suggested on this thread, but still has the same issue. I found out a family friend actually worked for Openreach, and they came around earlier on and took a look at everything before we got in touch with BT, who are our ISP.

Tried with them on extension wires, directly into the master socket, different filters and it all continued.

Eventually, he tried a different router, and we repeated the tests. The problem had gone, and we repeated the test of making a call and speaking down the line on 10 occasions to avoid a false positive/negative. This seems to have sorted the issue, but it took a fair amount of messing around to identify.

Thank you for all your help!

esuhl

Taiko wrote: »

Eventually, he tried a different router, and we repeated the tests. The problem had gone, and we repeated the test of making a call and speaking down the line on 10 occasions to avoid a false positive/negative. This seems to have sorted the issue, but it took a fair amount of messing around to identify.

That's a good point! I'd forgotten about the problems I had when I migrated to BE and was trying to use an old Netgear router. It should have been able to cope with a 24Mb/s connection but I got a fraction of the speeds I was expecting. All was resolved when I switched to the Thomson router BE supplied...

Ah well, glad you got it sorted!