Deteriorating Noise Margin

Pickers · 14 Jan 2006 at 16:18

tolien said:
46dB would seem to imply somewhere in the realms of 5km of cable, assuming it's ordinary copper with no dodgy joints etc.
First path should be getting Bulldog to up the target SNR margin (if that's not what they're doing), then take it from there.

I believe thats what the guy said they would do. Though so far nothing has changed... dunno how long before they will fiddle with that kinda thing :confused:

tolien · 14 Jan 2006 at 16:21

Tried resyncing?

Pickers · 14 Jan 2006 at 16:24

Just tries it. No change still

wesley · 14 Jan 2006 at 19:21

i had same problem 2 weeks ago, SNR drop below 10db at night and get disconnect every 10 mins

phoned bulldog and asked them to increase the SNR, no better,

turned out it was the front panel of master socket, working perfectly on TEST socket, i'm 1.6KM from my local exchange (sam knows)

my line stats -

your high SNR value is the problem, ask them to cap you at 2MB, dunno if they could do this.

see if u do the "2 wires trick" to improve SNR, cant remember the url

juno_first · 14 Jan 2006 at 21:24

I just tried connecting my dg834gt v32 by 2 wire phone lead & has connected 3.6 where normally 3.3.
I should be on 12.5 say uko & my upload is good but never had >4mbits.

PiKe · 14 Jan 2006 at 21:54

Find your ringer wire and disconnect the bugger, that should help

http://yarwell.blogspot.com/2005/08/adsl-tweaking.html

juno_first · 14 Jan 2006 at 21:54

How can you find how far your phone cable is from the exchange on sam knows.
Whats a ringer wire ?
I am a noob to adsl. thanks

PiKe · 14 Jan 2006 at 21:56

Click the link, all is explained within.

tolien · 14 Jan 2006 at 22:05

juno_first said:
How can you find how far your phone cable is from the exchange on sam knows.

Availability checker -> Enter phone number... -> BT ADSL.

Ring wire, fairly unsurprisingly, provides the ringing current for your phones. Filters and some phones generate the current themselves, and the ring wire can prove a problem.

juno_first · 14 Jan 2006 at 22:08

I got my micro filter plugged directly into the only phone socket with no dangly wire so the ring wire should not be much an issue in my case ?

PiKe · 14 Jan 2006 at 22:14

juno_first said:
I got my micro filter plugged directly into the only phone socket with no dangly wire so the ring wire should not be much an issue in my case ?

Having a filter can generate the ringing signal with no ring wire installed, the ring wire can act as a big aerial and introduce noise onto the circuit. Try disconnecting it, you may gain up to 10db.

Hmm you only have one phone socket? Then I dont think there will be a ring wire.

juno_first · 14 Jan 2006 at 22:57

Right, just looked at my only phonebox & there are only 2 wires anyway so no ringwire connected by the looks of it.

wesley · 14 Jan 2006 at 23:58

juno_first said:
I just tried connecting my dg834gt v32 by 2 wire phone lead & has connected 3.6 where normally 3.3.
I should be on 12.5 say uko & my upload is good but never had >4mbits.

your with UKO?

juno_first · 15 Jan 2006 at 00:04

Uk-Online yes, they say I could get 12.5mbits adsl2

slipd · 15 Jan 2006 at 17:24

PiKe said:
Find your ringer wire and disconnect the bugger, that should help

http://yarwell.blogspot.com/2005/08/adsl-tweaking.html

Hey guys,

I've got on-going SNR problems (I'm currently at 9dB but I can go as low as 4dB on a 1 MB connection) I'd like to try disconnecting my ringer wire if it improves things even slightly

At what point to you disconnect it thought? Do you start at the master socket etc? Also, which wire is it? Orange/White band...?

Cheers,

SW.

juno_first · 15 Jan 2006 at 17:26

maybe worth a look in your master socket 2 see if the ring wire is connected or there are more than 2 wires hooked up, see my pic above, though i'm no expert.

PiKe · 15 Jan 2006 at 19:34

Disconnect it from the master and any slave sockets. It's the orange/white wire.

slipd · 15 Jan 2006 at 20:13

PiKe said:
Disconnect it from the master and any slave sockets. It's the orange/white wire.

Cheers mate - I'll give that a try

Thinking about it though, if the wire is disconnected from the actual master, then it won't need to be disconnected from any subsequent extensions will it?

Just a thought, please correct me if I'm wrong

Cheers,

SW.

slipd · 16 Jan 2006 at 00:58

I just opened up my master socket and...

So only two wires connected? What does that mean :confused:

As you can see though theres a load more cable bundled behind the face plate, I suppose I should have looked there too as well :rolleyes:

Any thoughts?

Cheers,

SW.

PiKe · 16 Jan 2006 at 09:10

That master has no ring wire.