Reversing A an B

Openreach paid the area a visit last week and true to form my usually reliable broadband developed a faul t (can't they ever fix anything without breaking something else?). Last time the internet stopped every time the phone rang. From experience I tried reversing the a and b wires at the modem socket. Fixed it. This time a deafening hiss appeared on the phone line but the internet held up. Guess what, reversing a and b again fixed it. Filters checked first, sky, fixed phone and wireless phone all OK. Billion router does its best (even have the speed turned down to givea 9,db snr). Any ideas of what causes this polarity sensitivity and how it could be cured ?. Overhead line, adsl2, 53 dB downstream attenuation, 4 MBS usually, unless Openreach are in the village.

The bulk of the ADSL signal comes down the B leg of the pair. Your reversal of the polarity isn't fixing the problem, just masking it.

That doesn't make sense. It's pd between the lines. Pls don't respond again.

In reply to a post by MrOptimistic:

Pls don't respond again.

That's not the way to reply to someone trying to help, especially given Zarjaz's employment

In reply to a post by MrOptimistic:

That doesn't make sense. It's pd between the lines. Pls don't respond again.

ROFL
If you know better than Zarjaz then you wouldn't have asked your question in the first place.

Too funny .

See this thread. Almost identical opening post, January 2014.

I am a casual user of this forum and have always appreciated help and advice, people respond with advice and thoughts and you are asking for that by posting on a community forum, yet one person responds with a theory and you tell them Pls don't respond again. well why don't you do that and go and look for the help elsewhere, because I would like this thread closed @MrSaffron, beacucse of your unappreciated nature.

I think you are over optimistic.

Edited by thomaswarne01 (Mon 18-Apr-16 05:48:53)

Telling a fellow poster to not respond again because something did not make sense is nonsensical, since surely you would be interested in an explanation.

If a poster has done something that flouts the site rules then of course you are free to report it, but you cannot pick and choose who responds in a public forum.

My bad ! Sorry all round. Took umbrage a bit about the certainty that the reversal wasn't the cure but was hiding something else but then just stopped there. My take was thanks very much for that but if you are not going to help why bother and can you not do it again. Made sense at the time but perhaps caught in the wrong mood so sorry again.

Yes this problem has happened before, twice, and I did post here but didn't really get much further with it.

Anyhow, sorry for the rudeness.

Edited by MrOptimistic (Fri 22-Apr-16 12:52:16)

What, no answers about unbalanced lines and earth loops?