Since Saturday afternoon I've had a problem with very noisy crackling on my phone line. It started about 10 minutes into a call, and instantly made communication impossible. Since then it has apparently been fine, but only for about 3 minutes, then it starts again. It's "recovered" like this a few times.
I had been using an extension, but have tried it straight into the box (installed when I was with blueyonder before the takeover), I've also tried another (wired) phone plugged into the box, but the problem remains. Have also tried the phone test on the website, which indicates no problems.
Seems an odd issue (the fact it seems to fix itself for brief periods).