Rectified Loop error

In preparation of getting broadband I checked my phone line using 17070
and it reports a "rectified loop" error. Process of elimination I
discovered it is one of my Sky digital boxes causing the error,
disconnect that phone line and no fault is reported (we have 2 sky boxes
on a "mirror" subscription so they both need to be connected to the
phone line).

The sky box recognises the phone line and rings out to sky ok but will
this "rectified loop" error cause any problems with getting broadband?
Thanks.

On Sat, 23 Oct 2004 11:13:36 +0100, Mark <(E-Mail Removed)> wrote:

> In preparation of getting broadband I checked my phone line using 17070
> and it reports a "rectified loop" error. Process of elimination I
> discovered it is one of my Sky digital boxes causing the error,
> disconnect that phone line and no fault is reported (we have 2 sky boxes
> on a "mirror" subscription so they both need to be connected to the
> phone line).
>
> The sky box recognises the phone line and rings out to sky ok but will
> this "rectified loop" error cause any problems with getting broadband?
> Thanks.
>
>

Hi,

I wouldn't have thought it would cause any problems getting broadband, if
you've already applied and had it rejected ask your ISP to resubmit the
order and mention the rectified loop.
It is possible though that the loop could cause problems with an active
ADSL line, either causing random disconnections or a loss of sync. If you
need the Sky box connected then you might to try swapping the lead for a
new one, you'll probably find that it is damaged and the copper pair
inside are touching at some point.

With Regards,

Dave,
--
| Dave Tomlinson Broadband Solutions For
| Customer Support for Home & Business
| PlusNet plc @ http://www.plus.net
+ ----- My Referrals - It pays to recommend PlusNet -----

> In preparation of getting broadband I checked my phone line using 17070
> and it reports a "rectified loop" error. Process of elimination I
> discovered it is one of my Sky digital boxes causing the error,
> disconnect that phone line and no fault is reported (we have 2 sky boxes
> on a "mirror" subscription so they both need to be connected to the
> phone line).
>
> The sky box recognises the phone line and rings out to sky ok but will
> this "rectified loop" error cause any problems with getting broadband?
> Thanks.




No, it shouldn't affect ADSL provided you put a filter on it in the usual
way.

At worst a rectified loop condition will prevent all your phones from
clearing down the line when you hang up or your line might automatically be
answered mysteriously after a single ring, it depends on the polarity of the
wires to pins 2&5 of the offending item (sky box in your case)

As you are not getting either of the above affects I wouldn't worry too
much, I suspect the 17070 test can detect very small amounts of DC
asymmetry.

Two other things spring to mind.

Lightning damage?
Moisture ingress to Digibox?


Graham.

%Profound_observation%

"Graham" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> As you are not getting either of the above affects I wouldn't worry
too
> much, I suspect the 17070 test can detect very small amounts of DC
> asymmetry.
>
> Two other things spring to mind.
>
> Lightning damage?
> Moisture ingress to Digibox?

Thanks for the replies.
I think you're right about it detecting DC current. I swapped the phone
line around and the same box is now causing the rectified loop on the
other line . I also have an identical sky box (Pace2500) that is used
just for the free channels and when I connect that to the phone line it
also causes a loop error so it must be a design of the Pace box.

If it does become a problem with BB then I will just leave the phone
line out, if sky get funny they can supply me with another box FOC.

Mark wrote:
>
> Thanks for the replies.
> I think you're right about it detecting DC current. I swapped the
> phone line around and the same box is now causing the rectified loop
> on the other line . I also have an identical sky box (Pace2500) that
> is used just for the free channels and when I connect that to the
> phone line it also causes a loop error so it must be a design of the
> Pace box.
>
> If it does become a problem with BB then I will just leave the phone
> line out, if sky get funny they can supply me with another box FOC.

Many Sky boxes give a rectified loop test, mainly Grundig.
Yes it can effect ADSL (ADSL doesn't like that sort of fault much), but it
depends how bad it is. I've seen a Grundig so bad, that it looped the line,
stopping dialtone.
Suppose I'll have to keep an eye on Pace boxes as well now


--
reply to news at nytoo dot co dot uk

PlusNet Support Team wrote:

> It is possible though that the loop could cause problems with an
> active ADSL line, either causing random disconnections or a loss of
> sync.

Yep, can un-sync a mdem if it's a bad fault. Some of these cheap telco
dialup units give the same thing. Basic design fault

--
reply to news at nytoo dot co dot uk

On Mon, 25 Oct 2004 00:47:14 +0100, Nick wrote:

> Many Sky boxes give a rectified loop test, mainly Grundig.
> Yes it can effect ADSL (ADSL doesn't like that sort of fault much), but it
> depends how bad it is. I've seen a Grundig so bad, that it looped the line,
> stopping dialtone.

an isolation transformer should sort that out though, shouldn't it? they
don't cost much these days i don't think.

will

> an isolation transformer should sort that out though, shouldn't it?



How would the Box ever seize the line to make a call?


Graham.

%Profound_observation%