Why are two lines which are next to each other so different?
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Why are two lines which are next to each other so different?
19-01-2011 9:44 AM
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I have two BT lines in my (quite rural) house. Both have plusnet DSL.
One line belongs to my brother (who has aluminium phone lines and cannot get DSL at his house.) This broadband connection is sent over to his house via an 802.11 link.
I have the other line for my own broadband.
His sync rate is pretty stable, whereas mine goes up and down like a yo-yo. See my charts below:
The master sockets are *right* next to each other - so why are the two so different? And is there anything I can do to get my line more stable?
Thanks in advance for any advice.
Re: Why are two lines which are next to each other so different?
19-01-2011 10:22 AM
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(My guess is that the blips correspond to when the phone is in use - your brothers line I suspect won't have a phone attached)
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Why are two lines which are next to each other so different?
19-01-2011 1:08 PM
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The usual causes for a new synchronisation are
- Turning router on;
- Errors on line causing modem to spontaneously resync;
- DLM or Manual admin at BT performing action that triggers resync;
The latter is probably the least likely.
The obvious first question - are both modems left plugged-in and powered up 24/7?
If they are both treated the same, then the likely difference is how they perceive the line conditions. Some factors:
- What extensions are wired to each socket, the state of the connections, and whether the bell wire is connected
- What phones are connected to the line, and whether they are wired or cordless
- What filters are connected to the line, and whether they are faulty
- What Make/Model/Version of router (some routers are better at longer lines)
- The state of the line (including all the connections) on its route back to BT
As jelv points out, it's more likely that the *only* bit of equipment on your Brother's line is the router, while yours, in your own house, is likely to have other sockets & phones attached.
Line problems are frequently down to the internal wiring or equipment, so this is the first area to check. See http://www.plus.net/support/broadband/bbfaults/droppingconnection.shtml and http://www.plus.net/support/broadband/bbfaults/slowspeed.shtml
It could be a fault on your line back to the exchange, that your brother doesn't suffer from. However, you need to eliminate all the internal stuff first...
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.
Re: Why are two lines which are next to each other so different?
19-01-2011 1:37 PM
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Both modems are left on 24/7.
Line 1 has one extension to a sky box - I leave the sky box (and its micro-filter) unplugged from the socket, except for the ten seconds or so when I order a pay-per-view film. Which is pretty infrequently.
Line 2 has no extensions and no phones - the only connection is the modem attached to the DSL socket of the faceplate.
Line 1 has a micro-filter attached to the test socket of the master socket (I leave the faceplate off.) That micro-filter has the modem attached to the DSL port and a cordless phone base-station attached to the phone port (Siemens Gigaset S685IP)
Line 1's Router is a Linksys WAG120N
Line 2's Router is a Draytek Vigor 2600 plus
If I have my router attached to the test socket does that mean that the extension shouldn't affect it?
Re: Why are two lines which are next to each other so different?
19-01-2011 2:10 PM
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Can you confirm that the Sky box is attached via a proper ADSL filter and not just a simple splitter that may have come with the box?
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Why are two lines which are next to each other so different?
19-01-2011 2:30 PM
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I'm not sure what you mean by the other question - there aren't any wires attached to the removable part of the faceplate.
You can see the master sockets here:
Re: Why are two lines which are next to each other so different?
19-01-2011 2:34 PM
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Re: Why are two lines which are next to each other so different?
19-01-2011 2:43 PM
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I'll give it a go.
Re: Why are two lines which are next to each other so different?
19-01-2011 4:50 PM
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jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Why are two lines which are next to each other so different?
20-01-2011 4:19 AM
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Quote from: Diggory Hmm - no. That's a good idea.
I'll give it a go.
Another swap that you could try is to put the ADSL-Nation faceplate on your master socket, and put the rat-tail filter on your brother's socket. The relative quality of those 2 filters can make a difference too.
I'll add the usual cautionary note that if you make too many disconnections within a short period, then BT will increase your noise margin as it thinks your line is unstable, and you'll lose some speed. In any testing, do single swaps and wait a long time to watch the results! Using the controls within the router's admin page to disconnect will be better than just powering down, but I don't know iff that is possible with either of your router models.
Quote from: Diggory I'm not sure what you mean by the other question - there aren't any wires attached to the removable part of the faceplate.
If the extension for the sky-box is a full permanent installation, then the wires from that ought to end up connected to the front faceplate of your master socket (ie the half-height faceplate that is not plugged in at the moment). Or, if it is wrongly wired, then it could be wired into the back of the master socket, so can never be unplugged from the line.
If it is more of a temporary installation, then it will end as jelv describes - a loose cable, with a standard BT-style plug, that you then plug into where the phone base plugs in.
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.
Re: Why are two lines which are next to each other so different?
20-01-2011 11:52 AM
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Quote from: jelv When you said an extension to the Sky box did you mean a loose cable fitted in to a doubler beside where the phone base unit plugs in or an extension socket?
It's a proper extension socket.
Re: Why are two lines which are next to each other so different?
20-01-2011 12:00 PM
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With it in it's current state don't bother trying the ADSL Nation faceplate!
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Why are two lines which are next to each other so different?
20-01-2011 12:38 PM
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Quote from: Diggory
Quote from: jelv When you said an extension to the Sky box did you mean a loose cable fitted in to a doubler beside where the phone base unit plugs in or an extension socket?
It's a proper extension socket.
How does that wire back to the master socket?
It should be isolated when the face plate is taken off.
Re: Why are two lines which are next to each other so different?
21-01-2011 9:38 AM
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I have removed the top half of the faceplate to expose the box behind - this is how it looks:
I have now managed to connect my Sky box to a VoIP line, so don't even want the extension connected any more - I want the line as clean as possible.
Any ideas what I need to do to disconnect it?
Thanks.
Re: Why are two lines which are next to each other so different?
21-01-2011 9:51 AM
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