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New modem/router DSL-N55U won't connect to ADSL2/ADSL2+

pieandapint
Hooked
Posts: 6
Registered: 20-01-2017

New modem/router DSL-N55U won't connect to ADSL2/ADSL2+

Hi, I've been configuring an Asus DSL-N55U on my plusnet but can only establish a G.DMT connection, ADSL2 and ADSL2+ will not connect.

I know my exchange is 21cn (New Mills - Cabinet 9) but wonder if I've been left on a 20cn connection as I'm on quite a long line and I've never synced over 8Mbps.

 

Is it possible to have my line moved over to 21cn hardware?

 

Cheers

Dave

 

 

4 REPLIES
Community Veteran
Posts: 4,920
Thanks: 343
Fixes: 16
Registered: 10-06-2010

Re: New modem/router DSL-N55U won't connect to ADSL2/ADSL2+

Did another modem/router connect successfully using ADSL2/2+?

I think there's a problem with some Asus devices including the DSL-N55U, they can't handle a 3dB target SNRM on ADSL2/2+. In general, though the wireless router aspects of the Asus devices may make them popular, the DSL modems they use aren't so good.

pieandapint
Hooked
Posts: 6
Registered: 20-01-2017

Re: New modem/router DSL-N55U won't connect to ADSL2/ADSL2+

I just used the plusnet technicolor before this but I do know that it never achieved over 7.6-7.8Mbps.

 

I always assumed it was down to line length but since getting the Asus it has made me wonder if my line is only ADSL1 because of the sync speed.

 

Cheers

Dave

Community Veteran
Posts: 4,920
Thanks: 343
Fixes: 16
Registered: 10-06-2010

Re: New modem/router DSL-N55U won't connect to ADSL2/ADSL2+

You could put the Technicolor back on and check the DSL stats:

G.992.1 = ADSL1

G.992.3 = ADSL2

G.992.5 = ADSL2+

Plusnet do (or at least did) have a policy of setting lines to ADSL1 only based on estimated speed, but for speeds lower than yours.

pieandapint
Hooked
Posts: 6
Registered: 20-01-2017

Re: New modem/router DSL-N55U won't connect to ADSL2/ADSL2+

The technicolor says it's using ADSL2+

 

Mode: ADSL_2plus    
Traffic Type: ATM    
Status: Up    
Link Power State: L0    
 
  Downstream Upstream    
Line Coding(Trellis): On On    
SNR Margin (1 dB): 2.3 4.5    
Attenuation (1 dB): 48.5 26.5    
Output Power (1 dBm): 20.3 12.2    
Attainable Rate (Kbps): 7808 1088    
 
  Path 0   Path 1  
  Downstream Upstream Downstream Upstream
Rate (Kbps): 7470 684 0 0

 

Maybe the SNR was a bit high for the Asus as you said, I thought it may have been more than coincidence that my connection never exceeds 8Mbps.

 

Cheers

Dave