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skoot

2 posts

Wannabe Geek


#81119 8-Apr-2011 10:13
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Hello.

I recently switched to a TP Link TD-W8901G ( this http://www.tp-link.com/products/productDetails.asp?pmodel=TD-W8901G )
I'm having problems with it connecting and it randomly disconnecting. My ISP is Telecom NZ and I'm on a 40GB plan. The problem is that the router takes at least 30mins to connect, and only after several resets. Once it is connected it can not be relied upon to remain connected. The problem seems to centre around the DNS connection, but also the Downstream SNR Margin. The router tells me that it is connected, ADSL synchronized, gateway set etc.. and that it has found the preferred DNS. However, the SNR Margin fluctuates between 0 and 13 db and it will flat out not connect, I can't ping the DNS or anything else.
Is this a common problem with Modems Telecom do not supply?

This is becoming quite the frustration.

All help is appreciated.

Thanks.


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cyril7
7833 posts

Uber Geek

Trusted
Subscriber

  #456712 8-Apr-2011 12:24
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Hi, its not normal for that type of disconnect action unless its a faulty unit, or your DSL connection is poor.

Could you please post your line stats, ie attenuation, noise margin, sync rates, preferably when the connection is working.

Cheers
Cyril

Oldhat
172 posts

Master Geek


  #456908 9-Apr-2011 01:41
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Telecom DNS servers don't respond to ping, so that connectivity test is redundant for this type of connection.

What router were you using previously and did it exhibit the same issues?

 
 
 
 


foremannz
34 posts

Geek


  #456913 9-Apr-2011 06:05
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Have you got another router to try to see if the SNR is more stable - 0 SNR is pretty much loss of connection.

salival
29 posts

Geek


  #457219 10-Apr-2011 13:04
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Hi.. I also have a TP link modem (TD-W8960N) and this exact same issue.. except i'm with snap. I think it's related to the tp link hardware, though.

Sometimes when the connection drops it can sit reconnecting for 1-30 minutes.

When it does so, it scrolls this in the system logs:





Jan 1 00:00:41
daemon
notice
syslog: PPP: Start to connect ...




Over and over again till it takes pity on me and connects. It has already synched to the cabinet before it does this, btw.

Are you able to check your system log to see if it's scrolling this error?

These are my line stats to compare:





Mode:
ADSL_2plus


Traffic Type:
ATM


Status:
Up


Link Power State:
L0 


 


 
Downstream
Upstream


Line Coding(Trellis):
On
On


SNR Margin (0.1 dB):
127
101


Attenuation (0.1 dB):
140
60


Output Power (0.1 dBm):
0
128


Attainable Rate (Kbps):
14012
952


 


 
Path 0
 
Path 1
 


 
Downstream
Upstream
Downstream
Upstream


Rate (Kbps):
11415
956
0
0


 

*edit* added modem version



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