I'm not going mad.... am I?

I'm currently looking at a relative's Plus net line. Their speeds don't quite seem right.
They are very close to the exchange and their router (Voyager 2110) gives the following info:
Downstream Upstream
Line Rate 9167 Kbps 96 Kbps
Noise Margin 4.9 dB 6.0 dB
Line Attenuation 8.0 dB 0.5 dB
Output Power 0.0 dBm 11.8 dBm

Surely 8dB of attenuation should give 20+Mb/s, and they should certainly be getting more than 96Kb/s of upstream?
But the noise margin doesn't suggest a noisy line (and they've not experienced any audible interference....)

Thoughts? (other than raise a ticket!)

The noise margin suggests a lot of noise limiting the sync. I recommend running routerstats, or DMT.

What's the speed like in the test socket behind the master, with nothing else connected to the phone line?

The upstream speed is a disaster - I suggest trying the test socket and a new filter
Alternatively they may have an unfiltered phone/sky box etc.

Edited by deleted (Sat 14-Jan-12 10:56:39)

There's a single extension which runs the router and DECT phone.
I'd forgotten about the filter - I'll give that a shot. And I'll also try the router direct into the master socket (would have done that before a ticket anyway!)

In reply to a post by gromit69:

There's a single extension which runs the router and DECT phone.
I'd forgotten about the filter - I'll give that a shot. And I'll also try the router direct into the master socket (would have done that before a ticket anyway!)

Not the master socket! The Test socket on the wall at the back when you (gently) remove the faceplate .

Check if the ring wire is connected to the master faceplate and gently disconnect it. Don't cut it.

I now recommend this for those who aren't sure
http://www.youtube.com/watch?v=D94c6hnstu4&feature=p...

Sorry, I meant the test socket.
Tried it in the test socket, no difference to the connection statistics.

Can you post the stats from the test socket?

I assume that on changing connection to Test Socket that you powered down the router so that it will have re-set itself. Sometimes I have found my router seems to get stuffed with clutter and needs a power-down re-set to clear.

I had to physically move the router and use a different power socket, so it got a reset and had to reconnect.

Sorry, I didn't make a note of the exact stats on the test socket.
However, they were insignificantly different from the stats above. IIRC the attenuation was 4.8 rather than 4.9, and the noise margin remained at 8.0.

What about dialling the BT test number 17070? There might be some clues there.

Meldrew

Hello,

Do you have an option to test with a newer router other then the Voyager 2110? just wondering because the router is getting a bit old now as I believe they were introduced back in 2003 before ADSL 2+ was available.

9 years old, it could be ready to die.

Just a further thought. It is always useful to have a spare router. BT Home Hubs work with PN and you can pick them up for peanuts on Ebay!

After all that, it did turn out to be the router at fault. I dug out an old Linksys which managed to sync properly (7Mb/448kb). So the ADSL2 thing could be on the money.
A new router is on order - thanks everyone!