connection drops snr

[lumi]

hmm wonder if u have advice

ive had bt round and they fitted a filter before the telephone port in the wall

im 900m from exchange in flats no master socket i can see

only one socket in flat

tried different phones but all seem to dropp connection or snr plumets when i use the phone

snr is around 11-13 normally and syncs at 8meg

using netgear 384 and router stats to show.

thing is sometimes i use phones and its ok..hmmm

[Rik]

If you try using an additional 'soap on a rope' filter for the phone, does it improve things? Is there anything else connected, eg Sky box?

[lumi]

yeah i have an additional filter but the cheaper solid block ones not with the extra wire bit where phone plugs in and then this goes through an extension line to phone socket where the  soap on a rope filter is.

ill try another filter to plug phone directly into

[Rik]

It's the simplest test to try, the solid block filters don't tend to be as good as the 'soap on a rope' type though. You should have received a couple with the Netgear.

If that doesn't help, we need to look more closely at your wiring, eg any extensions in use, the routing of cables etc.

[lumi]

ok yeah

1 phone into soap on a rope filter
2 3 m extension cable into soap on a rope filter
3 834 plugged into this filter

its not like a master socket have looked
bt engineer fitted on filter hardwired into wall before the socket to stop any interference ie taxis etc lol

confirmed 900m from exchange for sure

have at moment a cordless digital phone and it def causes snr to fluctuate sometimes dropping but only in last day

before it went lower but held onto line

i can try a bog standard old phone none cordless again but thats a pain not being cordless.

im just surprised still it has this effect as most of the time i get 7 meg speeds but dont want drops to effect profile

[Rik]

The filter the engineer fitted was probably to eliminate RF from the feed, not to replace the normal 'equipment' filters. Unless you have a face plate with two outlets, one the standard BT socket and the other an RJ11 (modem) socket, I'd expect you to need to use a filter for your phone. Hopefully the one you now have connected will solve the problem.

It's worth noting that, if the extension lead you are using for the router is a flat lead, it is probably picking up noise. If you have to use an extension, ie you can't move the router, it will pay you to use an extension which has 'twisted pair' cables.

[lumi]

indeed the filter fitted was not to replace equipment

and was to eliminate rf and as he said any taxi random picks ups , ham radio interference etc

of course the phone needs a filter

the router is plugged directly into the filter that is connected directly to the phone socket

from the phone socket filter i have an extension lead the runs to another filter that the phone plugs into.

is that clearer?

[lumi]

only seems to have got worse last 24 hrs weird

ive manged to stretch phone lead and eliminate the extension cable

[Rik]

It could be a faulty RF filter or an obscure line fault. I think you need to contact support to get BT out again.

[lumi]

ok done some more testing.

bt have synced my profile at 4000k now pfff

900 m from exchange router synced at 8 meg was finew till tuesday.

using phone dropped snr but not completly.

on tuesday it dropped completly a few times now im 4000k on bt. seemd very sensitive to have a few drops then drop profile.

any way removed extension cable etc and replaced phone with an old bog standard one.

set router stats goinfg and made a phone call.

snr went from 12 to 3.

so everytime i use the phone tried 3 now snr drops.

why is this? and how can i stop it.

[Rik]

It sounds like a line fault, possibly HR or line card. Call support, explain the problem, they'll need to test and get a BT engineer out.

[MoHux]

Although Lumi says he only has one socket in the flat, I wonder where it comes from.
I have never suffered from it myself, but I am wondering if it could be the symptom of a REN problem.

Or if it has been wired as an extension it could be that other flats have things like set-top boxes etc, so when they use their (unfiltered) phones/appliances his SNR drops thro' the floor. 

[lumi]

i have had two bt engineers out already

one to test line..i said it was noisey etc ..tested and he said fine . imasked about the copper etc he said its not old.

second enginner came out. he fitted a filter before the socket said it would stop any interferance from taxi ham radios etc.

he tested snr and he got 6 db, both my routers dlink and netgear said 11db..hmmm

after filer fitted his said 10 db mine said 14 db.

since then line never dropped but snr occasionly went low but not often, been logging with router stats. my speed went from 4 meg then to 6-7 mostly and been there till tuesday.

sometimes phone caused it to lower not drop.

since tues it caused a complete drop and resync bt profile to 4 meg.


even with bog standard phone i can see snr lower

the line goes from my socket out from main room down hall and through bathroom to outside wall where there is a box all lines go in here from flats.

i asked about this first enginneer said ive wired u driectly into exchange now after he went out.

now i was a little hmm so how he do that..hmmmm. surley he,d have to join wires etc not sure i beleive him.

second engineer said thats rubbish he cant.

thats where im left,

im having no luck as virgin connection is oversubscribed and i get packet loss.

ident is very nice to game on nice ping on fast path etc and was stable till tuesday.

but this interference from making a phone call is worrying me about any long term issues i may have.

[lumi]

ok couldnt sleep got cold n too hot lol

tested at 4:50 am so hopefully eliminate other people in flats near me.

11db made 6 calls as below

1 made phone call to mobile..complete drop

2 and again diff phone

3 and again

4 didnt change at all satyed at 11db no drop

5th dropped to 4db held line

6th complete drop

then stable again at 11db

tried 3 diff filters during this test

differences since tues weathers hotter imo

ive had bt out twice last one via idnet

they know the issue

if i cant sort it ill have to stick on virgin media

[lumi]

ok did test at 3:38 pm

line was totally stable no flcutuations in snr from 1:59 to 3:38...the useual is a smalll fluctuation of 1-2 db so this was a little unexpected.

made phone call at 3:38 snt dropped to 7 line held ok.

profile looks like its changed, speed test gave just over 5 meg.

weather is a lot cooler and raining.

so its seems to be weather het etc that has an effect.

so those with knowledge on cables copper telephonics, etc what needs to be done to stop it.

ta for all replies n advice offered

[lumi]

ok couple days agao i had another engineer out

this time he fitted a new better more filter face plate that i plug directly into, he said its better than the other filters.

well seems to have worked i still see snr drop when i use phone but only from 11 to about 7 now so holds the line

[Rik]

If you've eliminated the phone as the cause of the problem, I would be thinking about an HR fault on the line. Has this been tested for?

[lumi]

hr fault is?

well i now have fitted an rf filter before the socket and a new socket face plate.


the line holds now but i still see it go from say 11 to 7 snr when i use phone, so at least it dosent drop out now so i can use net and phone same time

is that to be expected? or should it not move at all?

[Rik]

HR = High Resistance

The most common symptom of the fault is the ADSL connection dropping when the phone is picked up.

My own line doesn't vary when I use the phone.

HTH.

[lumi]

its weird as its not all the time, sometimes it does it, sometimes not.

just tested now and used phone, snr didnt lower..ill keep checking.

at least for now if it does lower it doesnt drop out.