DSL out of sync

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jehallinan

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#20834 7-Apr-2008 14:02

My broadband was behaving rather strangely this morning, so I checked the adsl router log, and this is being logged every minute or so...

Apr 7 13:55:01> DSL out of sync
Apr 7 13:55:01> DSL in Sync

I have the telecom supplied Dlink DSL-G604T. House has a splitter, and the router is connected to a switch which connects my pc to the router.

Tried the usual telecom answers such as rebooting, checking cables etc.

Called telecom, and the girl thought it was probably a problem between my pc and the router. Now, even with my minor knowledge of adsl I know that the answer is rubbish so I did not expect any great solutions from this tech support.

Anyway, the CSR is quite happy that my connection is fine because it is not dropping out.

Anyone know what causes such an issue?Or, how to resolve? This has only just started happening recently , since last time I checked the logs all was fine.

cyril7

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#121797 7-Apr-2008 15:03

Between the PC and router, really. Just one point unrelated to the fault, you say you have a switch between the router and PC, is that because there is lots of other gear, or to make cabling easier?

Anyway, there are several potential issues, modem gone bad, DSLAM port gone bad, Line(on Telecoms side of demarc) gone bad, or wiring in your house gone bad.

There are two which you need to check through yourself before going back to Telecom.

Firstly you say there is a splitter, is this a centrally fitted one by Telecom, or just a micro splitter at the modem, if the latter do all Phones/faxs/Sky modems have a micro filter on them aswell.

Secondly whats your modem report for statics on the ADSL line, we are talking Signal to noise, Line rate, Line Attenuation. do you have access to another modem that you can use to test if the modem is faulty (ie by substitution).

Cyril

jehallinan

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#121811 7-Apr-2008 15:52

The splitter was installed centrally by a telecom technician, so I don't require phone outlet filters.

The dsl modem/router is in the patch panel closet. I don't use the adsl modem router ethernet ports (there are only 4 and they are not gigabit ethernet either), so I just plugged the router into the switch (which provides 24 gigabit outlets).

This has been working ok up to today.

The telecom CSR also was also saying that the problem might be because I exceeded my data cap last month. However, when I pointed out to her that I am currently under the data cap she dropped this line of reasoning thank goodness.

House is 3 months old, and no rain recently so I think the 'wiring' should be ok.

I'll try my other adsl modem, see if that solves the issues.

This is from my adsl modem status page...

ADSL Firmware Version: 5.00.04.00 - 5.00.03.00 - 5.00.03.00 Annex A - 01.07.2b - 0.52
ADSL Software Version: V3.00B02.NZ.20060711
Line State Connected
Modulation ADSL_G.dmt
Annex Mode Annex A
Max Tx Power -38 dBm/Hz

Item             Downstream Upstream Unit
SNR Margin       12         26       dB
Line Attenuation 36         23       dB
Data Rate        6208       160      kbps

Thanks for the advice.

cyril7

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#121825 7-Apr-2008 16:28

Ok thats fine, and fine on the switch, just wondered.

Your connection does not seem to far out of order, although the S/N is OK it could be better for the attenuation. I suggest you try another modem and see what eventuates.

Cyril