Modem/router disconnecting every 10mins

DanielMMS

DanielMMS

DanielMMS

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I'm in the process of changing my modem/router. My old one - a Netgear DG834PN - needed replacing partly due to a faulty power socket but mostly since I wanted something with N, USB and various other bells and whistles. The replacement is a Belkin N600 DB F9J1102uk.

I've set the new router up. All the settings seems to be fine. I can connect to the router direct, with homeplugs and wirelessly. The problem is that the router is constantly disconnecting from the internet with the security log showing the entries at the bottom of this. I've tried updating the firmware, doing a factory reset, replacing the socket adapter and so on but with no joy. I would think that it is the line/connection causing the problem but the Netgear seems to work on it without any dropouts.

Has anyone got any thoughts? The thing that slightly confuses me (not difficult) is that my broadband is PPPoA - which is the settings I have active on the router - whereas the errors below seem to mention PPPoE. Whatever that means!

Feb 6 20:05:20 router daemon.info dnsmasq[337]: reading /etc/hosts
Feb 6 20:05:20 router daemon.info dnsmasq[337]: reading /tmp/resolv.conf
Feb 6 20:05:20 router daemon.info dnsmasq[337]: using nameserver 208.67.220.220
Feb 6 20:05:26 router daemon.notice pppd[7619]: PPPoE disconnected
Feb 6 20:05:26 router daemon.info pppd[7619]: Exit.
Feb 6 20:05:26 router daemon.info pppd[7619]: Exit.
Feb 6 20:05:33 router daemon.info wanstatus[7676]: Internet Status: Not Connected
Feb 6 20:05:35 router daemon.notice pppd[11935]: PPPoE 2.4.1 started by root, uid 0
Feb 6 20:05:43 router daemon.info dnsmasq[337]: reading /etc/hosts
Feb 6 20:05:43 router daemon.info dnsmasq[337]: reading /tmp/resolv.conf
Feb 6 20:05:43 router daemon.info dnsmasq[337]: using nameserver 208.67.220.220
Feb 6 20:05:43 router daemon.info dnsmasq[337]: using nameserver 208.67.222.222
Feb 6 20:05:50 router daemon.info wanstatus[7676]: Internet Status: Connected
 
The 834 probably had a broadcom chipset which is good with long/flaky/noisy lines. Not sure what the Belkin has.

What sort of connection stats have you got. Signal to Noise ratio, attenuation etc will be of particular intersest. How do these values change through the day and what happens when the connection goes down.
 
Tealc said:
The 834 probably had a broadcom chipset which is good with long/flaky/noisy lines. Not sure what the Belkin has.

What sort of connection stats have you got. Signal to Noise ratio, attenuation etc will be of particular intersest. How do these values change through the day and what happens when the connection goes down.
Click to expand...

Not had the time to play with the thing this evening but this is a snapshot. Are they they stats you mean?

Type Interleave Path
Status Show Time
Downstream Upstream
Data Rate (kbps) 2048 384
Noise Margin (dB) 23.0 26.0
Attenuation (dB) 37.8 21.0
Output power(dbm) 18.7 11.9
 
You should be pushing a sync speed of ~7Mbps.

Suggest you try plugging direct into the test port as per this http://www.kitz.co.uk/adsl/socket.htm and report your stats back again right after.

This will eliminate any house extensions from the equation and any potential bell wiring.....this can also cause disconnections.
Your noise margin is also very high, should be circa 6dB....the higher the noise margin the lower the sync speed and the higher the line attenuation the lower the sync speed (this is fixed pretty much due to line length although internal house wiring can have an affect on whats reported).
 
Thanks for the suggestions guys. Unfortunately, the wiring is pretty ancient so the master socket is the LJ variety so no test socket. The master (the one with the yellow capacitor) is the socket I already use for the router. Plugging the router in direct without a filter or any other devicesinserted makes no difference to the stats above. I haven't tried removing the bell wiring yet so that is probably the next step.
 
Yes do that.

Your Noise margin is incredibly high and should be stable at around 5-7 dB if you are set up with ADSL Max or any LLU service. Your 23 dB suggests that either you are on a fixed 2 Mbit line or it's been dropped to there by line management to deal with a line instability issue.

The bell wiring isn't used by modern telephone equipment so can safely be removed and could sort out the issue.

Have you been able to get the stats when the connection drops though? You should see a difference if it's a sync issue. When I had a bad line my Noise ratio used to drop down to 1 or 2 dB and then eventually to 0 dB and the line would lose sync and I'd have no internet until the problem resolved itself.
 
Last edited:
Well... I've removed the ring/bell wire from the socket (orange wire in slot 3) and that has reduced the noise margin by a massive 1db! So NR is now 22db for downstream. Strangely, the stats stay the same as above even when the internet connection is down.

I've emailed my ISP and, typically, they rang at the one time I couldn't get to the phone. So it's back to the DG834PN for another day until I manage to speak to them tomorrow!
 
You'd exPect the noise margin to get larger after removing the bell wire. 1 dB though is nothing and makes no difference. Connect again and you may find it goes back up.
 
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