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 | 2 | 3 | 4 
111 posts

Master Geek


  Reply # 896681 17-Sep-2013 07:35
Send private message

That Output Power is off the rails ... glitch in the reporting?   

222 posts

Master Geek
+1 received by user: 45

Trusted

  Reply # 896954 17-Sep-2013 14:10
Send private message

Daylo: Reading the last few posts, I must be lucky.  As said previously, on ADSL2+ I had 12.3dB down for attenuation (based on modem stats, not a Telecom tool. So is this different?), so was outside the limit as has been described (which was news to me until I read it here). They came & installed. And it's on day 11 as of today.



Stats (as of right now). Also now looks like DLM-1 to me 


  Modem state: up
Up time (Days hh:mm:ss): 0 days, 16:10:38
xDSL Standard: ITU-T G.993.2
Channel Mode: Interleaved

Number of reset: 3

Chipset Vendor info (G.994.1): Local Remote
Country code: B500 B500
ID: BDCM BDCM
Specific: 0000 A3D3

System Vendor info (showtime): Local Remote
Country code: 0F00 0000
ID: TMMB ----
Specific: 3C61 0000

Bearers generic info DS US
Payload rate [Kbps]: 37618 10357
Attenuation [dB]: 14.5 30.5
Margins [dB]: 12.3 21.8
Output power [dBm]: 18.6 5.5

Number of bearers: 1
Bearer 0 DS US
INP [DMT symbols]: 0.00 0.00
Delay [ms]: 0.00 0.00
Depth []: 1 0.00
R: 0 0



If you're getting the attenuation from your modem it is reading VDSL attenuation. The attenuation we qualify you for VDSL is ADSL attenuation (they have different frequencies). This is likely why you are seeing such differences



34 posts

Geek
+1 received by user: 1


  Reply # 896998 17-Sep-2013 15:04
Send private message

kawaii:

I'd be tempted to check out to see how much of the issues relate to the wiring in the house vs. the street.


He connected my router at the roadside pillar, which was approximately 40m away from where I had it installed in the house.
The stats were still very similar so we discounted it being a issue with house wiring.


111 posts

Master Geek


  Reply # 897052 17-Sep-2013 15:56
Send private message


If you're getting the attenuation from your modem it is reading VDSL attenuation. The attenuation we qualify you for VDSL is ADSL attenuation (they have different frequencies). This is likely why you are seeing such differences


I know all this. My post wasn't related to differences in frequency hence my different dB stats between xDSL technologies. It was related to Telecom saying one thing, and delivery being something else i.e. stating 10.8bD minimums.  Which I didn't have (on ADSL), yet I have a pretty decent connection with VDSL now. Anyway, thanks for the response.

5149 posts

Uber Geek
+1 received by user: 1672


  Reply # 897061 17-Sep-2013 16:06
Send private message

Daylo: I know all this. My post wasn't related to differences in frequency hence my different dB stats between xDSL technologies. It was related to Telecom saying one thing, and delivery being something else i.e. stating 10.8bD minimums.  Which I didn't have (on ADSL), yet I have a pretty decent connection with VDSL now. Anyway, thanks for the response.


The 10.8dB figure is not just based on whether or not you will get a good connection. VDSL will perform very well out to far greater distances (and resulting higher attenuation levels).

However, Chorus will not generally deploy VDSL in these situations, as the interference emitted in to other cable pairs in the same feeder can have a very significant negative effect on other nearby customers.

It's a balancing act between pleasing the single customer on the longer line (i.e. higher attenuation), and disrupting xDSL services for the other 49 customers that are in the same feeder.

255 posts

Ultimate Geek
+1 received by user: 4

Trusted

  Reply # 897113 17-Sep-2013 16:48
Send private message

Daylo: That Output Power is off the rails ... glitch in the reporting?   

Yeah, mine is the same, it's actually a negative number in theory.
Gui
Output Power (Up/Down) [dBm]:429496712.0 / 13.5

CLI
  Bearers generic info                           DS             US
    Payload rate [Kbps]:                         39515          10337
    Attenuation [dB]:                            4.4            9.2
    Margins [dB]:                                12.3           19.1
    Output power [dBm]:                          13.5           -17.6


1 | 2 | 3 | 4 
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:



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.