Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

View this topic in a long page with up to 500 replies per page Create new topic
1 | ... | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19
7000 posts

Uber Geek
+1 received by user: 772

Trusted
Subscriber

  Reply # 651165 5-Jul-2012 11:00 Send private message

What is the cable loss number used for NZ? It defaults to 13.81 but I know my DS Attentuation is 2dB which calculates my connection at 90 but it's 70.

1216 posts

Uber Geek
+1 received by user: 117

Trusted

  Reply # 651168 5-Jul-2012 11:03 Send private message

I believe that 13.81 is correct.

1078 posts

Uber Geek
+1 received by user: 45


  Reply # 651297 5-Jul-2012 13:53 Send private message

networkn: What is the cable loss number used for NZ? It defaults to 13.81 but I know my DS Attentuation is 2dB which calculates my connection at 90 but it's 70.


chorus use higher snr margins than other countries typically do.  it's actually impossible to sync at 24 megabit in nz on non-llu adsl (actually there's a kind of cheat called snr tweaking) .  vdsl is likely to be the same.

that said, you'd probably not notice much difference between 70 and 90.

1216 posts

Uber Geek
+1 received by user: 117

Trusted

  Reply # 651368 5-Jul-2012 15:22 Send private message

mercutio: it's actually impossible to sync at 24 megabit in nz on non-llu adsl (actually there's a kind of cheat called snr tweaking).


Sounds intriguing!

200 posts

Master Geek


  Reply # 651369 5-Jul-2012 15:24 Send private message

You can do that on the FritzBoxes too but it does void the warranty in order to do so. 
Napster has details on how to go about it last time I checked. 

1216 posts

Uber Geek
+1 received by user: 117

Trusted

  Reply # 651371 5-Jul-2012 15:27 Send private message

McGee: You can do that on the FritzBoxes too but it does void the warranty in order to do so. 
Napster has details on how to go about it last time I checked. 


Is that because you have to activate telnet in order to do the tweak?

1078 posts

Uber Geek
+1 received by user: 45


  Reply # 651372 5-Jul-2012 15:28 Send private message

SamF:
mercutio: it's actually impossible to sync at 24 megabit in nz on non-llu adsl (actually there's a kind of cheat called snr tweaking).


Sounds intriguing!


basically on broadcom asdl modems you can telnet (or ssh with some) and then you can get a shell (admin/admin is default username/password)

you can then do something like:

> adsl configure --snr 30

to get a lower snr 

you can do:

> adsl info

to find out if you're synced yet

and

> adsl info --stats

to see the normal system information

you can raise that 30 to a higher number to have a higher snr margin.  and you can lower it to get a lower snr margin.  the lower the snr margin the higher chance you have for dropouts, but also for increased sync rate.  if you want a snr margin below 6db you have to "cheat" by having a really high number like 65520 where it wraps around with 65535.   still the same rule - lower number lower snr margin - minimum i think is something like 65450, but that's likely to be unstable.

if it screws up you can always reboot - it won't persist across a reboot, but it will across a resync.  it's generally only good for a megabit or two though, and you can't adjust the up speed.

i'm curious if the fritzbox has a way to alter snr.







200 posts

Master Geek


  Reply # 651373 5-Jul-2012 15:32 Send private message

SamF:
McGee: You can do that on the FritzBoxes too but it does void the warranty in order to do so. 
Napster has details on how to go about it last time I checked. 


Is that because you have to activate telnet in order to do the tweak?



Yes it writes something to the PCB and it will always say it's unsupported by the manufacture and no matter how many factory resets or firmware down/up grades etc that you do it won't go away. 



1078 posts

Uber Geek
+1 received by user: 45


  Reply # 651377 5-Jul-2012 15:38 Send private message

McGee: You can do that on the FritzBoxes too but it does void the warranty in order to do so. 
Napster has details on how to go about it last time I checked. 


Can you adjust the upstream snr margn?

1216 posts

Uber Geek
+1 received by user: 117

Trusted

  Reply # 651382 5-Jul-2012 15:42 Send private message

McGee:
SamF:
McGee: You can do that on the FritzBoxes too but it does void the warranty in order to do so. 
Napster has details on how to go about it last time I checked. 


Is that because you have to activate telnet in order to do the tweak?



Yes it writes something to the PCB and it will always say it's unsupported by the manufacture and no matter how many factory resets or firmware down/up grades etc that you do it won't go away. 




Geez, that's a bit harsh!!  Surely you can't actually damage the hardware via some kind of telnet command!?

200 posts

Master Geek


  Reply # 651388 5-Jul-2012 15:50 Send private message

Well that's just from experience, Did it on mine and can't get rid of it and same with a mate who's got one. 
I asked AVM about it and they've said they can't offer support for it. 



1216 posts

Uber Geek
+1 received by user: 117

Trusted

  Reply # 651389 5-Jul-2012 15:53 Send private message

McGee: Well that's just from experience, Did it on mine and can't get rid of it and same with a mate who's got one. 
I asked AVM about it and they've said they can't offer support for it. 


Oh don't get me wrong, I believe you, but I can't believe that AVM would take such a hard line with telnet access!?

200 posts

Master Geek


  Reply # 651394 5-Jul-2012 16:04 Send private message

I think it's mainly cause of what you can do with the telnet access, I only used it cause I was running a PABX behind my fritz and needed to port forward 5060 to an IP rather than the device itself.

1078 posts

Uber Geek
+1 received by user: 45


  Reply # 651397 5-Jul-2012 16:13 Send private message

McGee: I think it's mainly cause of what you can do with the telnet access, I only used it cause I was running a PABX behind my fritz and needed to port forward 5060 to an IP rather than the device itself.


that seems a pretty big limitation.


202 posts

Master Geek


  Reply # 651610 6-Jul-2012 00:14 Send private message

Apparently you can reset that no support warning by running the fritzbox recovery tool.

Also to change the Training SNRM you have to edit the cfg file through telnet.



1 | ... | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19
View this topic in a long page with up to 500 replies per page Create new topic

Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:




News »

Trending now »
Hot discussions in our forums right now:

Judith Collins: I am resigning
Created by Presso, last reply by Yabanize on 31-Aug-2014 21:36 (71 replies)
Pages... 3 4 5


Orcon Global Mode launched
Created by freitasm, last reply by NonprayingMantis on 31-Aug-2014 19:40 (126 replies)
Pages... 7 8 9


Is my in-wall oven worth electrician call out?
Created by joker97, last reply by Handle9 on 31-Aug-2014 21:53 (20 replies)
Pages... 2


Sluggish Macbook
Created by SATTV, last reply by SATTV on 30-Aug-2014 22:21 (19 replies)
Pages... 2


Lightbox quality comments
Created by ronw, last reply by ronw on 31-Aug-2014 21:44 (74 replies)
Pages... 3 4 5


Lightbox press event release
Created by freitasm, last reply by IcI on 30-Aug-2014 17:54 (562 replies)
Pages... 36 37 38


recovering light box video
Created by ronw, last reply by rscole86 on 31-Aug-2014 22:11 (16 replies)
Pages... 2


Suddenly limited to 1mbps download speed on spark VDSL
Created by Jase2985, last reply by TimA on 31-Aug-2014 16:27 (47 replies)
Pages... 2 3 4



Geekzone Live »
Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.