SNR drops to zero, low download speed HELP

When I switch on my wireless router

First of all check your internal wiring (what there is of it).

http://www.dslzoneuk.net/socket.php

Then look at your line stats and post the results.

This will allow a judgement about the state of your line.

http://www.dslzoneuk.net/adsl_line_stats.php

internal wiring is just one phone conected directly to a filter and modem connected to filter several filters and modem leads tried plugged ito test socket.

stats
ADSL Link Downstream Upstream
Connection Speed 5568 kbps 448 kbps
Line Attenuation 40 db 10.5 db
Noise Margin 12 db 24 db

I have had one snr drop to zero tonight at 21.26 it and one resync it usal drops to 1200 by morning

19:36 Rx-Noise= 11 Tx-Noise= 24 Rx-Sync= 6112 Tx-Sync= 448 User-def-1= 0 User-def-2= 0
19:37 Rx-Noise= 10 Tx-Noise= 24 Rx-Sync= 6112 Tx-Sync= 448 User-def-1= 0 User-def-2= 0
19:38 Rx-Noise= 15 Tx-Noise= 24 Rx-Sync= 6112 Tx-Sync= 448 User-def-1= 0 User-def-2= 0
19:39 Rx-Noise= 10 Tx-Noise= 24 Rx-Sync= 6112 Tx-Sync= 448 User-def-1= 0 User-def-2= 0
19:40 Rx-Noise= 10 Tx-Noise= 24 Rx-Sync= 6112 Tx-Sync= 448 User-def-1= 0 User-def-2= 0
19:41 Rx-Noise= 12 Tx-Noise= 24 Rx-Sync= 6112 Tx-Sync= 448 User-def-1= 0 User-def-2= 0
21:26 Rx-Noise= 0 Tx-Noise= 0 Rx-Sync= 0 Tx-Sync= 0 User-def-1= 0 User-def-2= 0
21:27 Rx-Noise= 0 Tx-Noise= 0 Rx-Sync= 0 Tx-Sync= 0 User-def-1= 0 User-def-2= 0
21:28 Rx-Noise= 11 Tx-Noise= 24 Rx-Sync= 5568 Tx-Sync= 448 User-def-1= 0 User-def-2= 0
21:29 Rx-Noise= 11 Tx-Noise= 24 Rx-Sync= 5568 Tx-Sync= 448 User-def-1= 0 User-def-2= 0
Started: Sun 22 Apr 2007 17:39
17:40 Rx-Noise= 15
speed test 120kbps

Those syncs don't look too bad.

Do you know what your BT profile is?

http://www.speedtester.bt.com/

Ask your ISP to raise a fault with BT. It's possible that you may have been inadvertantly put on a split pair.

IP profile for your line is - 500 kbps
DSL connection rate: 448 kbps(UP-STREAM) 800 kbps(DOWN-STREAM)
Actual IP throughput achieved during the test was - 459 kbps

The connection rate starts off at 6000kbps after a reboot but ends like the above after a day due to several re syncs as the noise spikes hit

Firstly, do as john suggests and check your internal wiring and make sure thats all ok.

If it is, then rasie the fault with BT and get an engineer round to check things out (start off with a standard one who will check the wiring, street cebinet, then exchange). If that doesn't sure it, then they can take it further and get a ADSL engineer to look into it.

I had a similar situation, since going to maxdsl, my snr would drop through the floor when the phone rang, but only occasionally. I tried everything, filters, routers, master sockets, you name it. Finally I got an engineer out, and notice the noise on my line (automated checked revealed no faults). He had a look at the cable termination in a junction box, and found a poor connector.

Then he went down the local street cabeinet, found the cable that fed my house, and the cable connector fell off in his hand! The BT engineer was staggered, he was supprised my phone worked at all, let alone my broadband.

Thankfully, he fixed it all up, left the log open for the remainder of teh weekend, just in case the problem came back (he even gave me his mobile number to call if something went wrong) and I haven't had a problem since (touch wood).

So get a hold of BT and get an engineer out, they can be a real help at times.

Thanks B* engineer booked, I'll let you know what happened.