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line stats

which out of these 2 sets of line stats is the better, or would provide the best broadband signal carrier?

A:
down up
attenuation 32db 31db
noise margin 21db 10db

B:
down up
attenuation 11db 4db
noise margin 31db 31db

not sure if the noise margin is the SNR. there is no SNR on the line stats, other than packets sent etc, only the ones I posted above. router is a netgear DG834G
 
Last edited:
The noise margin is the SNR and the 2nd set would be better but both should get the 8 meg from MaxDSL but the 1st let of figures there is a problem on the line or the router is on the end of some horrible internal cabling setup.
 
aha, it is as I thought then. I did assume, lower attenuation and higer SNR was better. the reason why I posted this was, the stats from A were taken directly from the master socket, bypassing all internal wiring. the stats from B were taken from where I have my PC, at the top of the house, via the main internal wiring. this confused me, thought I had it backwards.

:confused:
 
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not sure if the noise margin is the SNR. there is no SNR on the line stats, other than packets sent etc, only the ones I posted above. router is a netgear DG834G

You can get more detailed stats from the DG834G using either telnet or the link below which exploits a flaw in the firmware to dump the stats file to the router's log. :D

http://192.168.0.1/setup.cgi?todo=ping_test&c4_IPAddr=1%26%2Fbin%2Fcat%20%2Fproc%2Favalanche%2F%2Amodem%2A%20>%20%2Fvar%2Flog%2Fmessages&next_file=log.htm
 
Are you sure you haven't swapped the attenuation and margin when you worte down this reading?

thanks for replying peeps.

no, because I took my computer downstairs, and wrote down the stats after the router was connected directly into the MS test socket. the stats I got from the router after it was re connected back onto the internal wiring, I took straight from the routers page on to the post I made. so I have only one lot of stats down on paper, and they were the ones from the MS test socket, which are A.

when I did take the reading from the MS test socket, I expected to find better or very similar stats. wondered if I was losing any potential signal through the wiring. but appears that the line is improved by the internal wiring, how this is possible I don't know.

the exchange is just at the end of my road. 500m I would guess. but I only live in a small town, so we don't get bad contention issues here.

oh and thanks for the link Mel, will check it out later. :)
 
someone on thinkbroadband, where I also posted said they would need to see the sync rates for both tests. just given Mel's link a go, and there is a whole host of info, but cant see anywhere where it states sync rate.

I am not on MAX yet, so I don't know if the router can only detect the sync rate if MAX is enabled. :confused:
 
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I am not on MAX yet, so I don't know if the router can only detect the sync rate if MAX is enabled. :confused:

You should get something similar (although much better - I'm a fair way from the exchange :hrmph: ) to the output below.

The sync rate is the Connection rate (as you can see I'm on a 1mbps fixed speed service)

AR7 DSL Modem Statistics:
--------------------------------
[DSL Modem Stats]
US Connection Rate: 288 DS Connection Rate: 1152
DS Line Attenuation: 44 DS Margin: 25
US Line Attenuation: 28 US Margin: 31
US Payload : 229180416 DS Payload: 2204141040
US Superframe Cnt : 53954654 DS Superframe Cnt: 53954654
US Transmit Power : 0 DS Transmit Power: 0
LOS errors: 0 SEF errors: 0
Errored Seconds: 0 Severely Err Secs: 0
Frame mode: 3 Max Frame mode: 0
Trained Path: 0 US Peak Cell Rate: 679
Trained Mode: 3 Selected Mode: 1
ATUC Vendor Code: 414C4342 ATUC Revision: 1
Hybrid Selected: 3 Trellis: 1
Showtime Count: 1 DS Max Attainable Bit Rate: 7776 kbps
BitSwap: 1 US Max Attainable Bit Rate: n/a
Annex: AnxA psd_mask_qualifier: 0x0000
ATUC ghsVid: 0f 00 41 4c 43 42 00 00
T1413Vid: 00 00 T1413Rev: 00 VendorRev: 00
ATUR ghsVid: b5 00 54 53 54 43 00 00
T1413Vid: 00 00 T1413Rev: 00 VendorRev: 00

[Upstream (TX) Interleave path]
CRC: 0 FEC: 0 NCD: 1
LCD: 0 HEC: 0

[Downstream (RX) Interleave path]
CRC: 0 FEC: 0 NCD: 0
LCD: 0 HEC: 0

[Upstream (TX) Fast path]
CRC: 1 FEC: 0 NCD: 0
LCD: 0 HEC: 0

[Downstream (RX) Fast path]
CRC: 152 FEC: 0 NCD: 0
LCD: 0 HEC: 0

[ATM Stats]
[Upstream/TX]
Good Cell Cnt: 4774592
Idle Cell Cnt: 618248959


[Downstream/RX)]
Good Cell Cnt: 45919605
Idle Cell Cnt: 2446174447
Bad Hec Cell Cnt: 145
Overflow Dropped Cell Cnt: 0

[SAR AAL5 Stats]
Tx PDU's: 1888629
Rx PDU's: 2426074
Tx Total Bytes: 154232319
Rx Total Bytes: 2154740872
Tx Total Error Counts: 0
Rx Total Error Counts: 1


[OAM Stats]
Near End F5 Loop Back Count: 0
Near End F4 Loop Back Count: 0
Far End F5 Loop Back Count: 0
Far End F4 Loop Back Count: 0
SAR OAM Ping Response Drop Count=0
SHOWTIME
1
failTrains=0

 
aha, ok. I have been looking for the word SYNC. the connection rate is the same for both sets of stats. it's only 576kbps atm as I got regraded. while I was on 2mb connection, I got 2200kbps approx. the line is always stable, never get any trouble. only when I got regraded, but that was something that cocked up during the regrade.

I was just suprised to see better stats on the extention wiring, than compared to the MS test socket. thought I had my understanding of attenuation and SNR backwards. :)
 
I was just suprised to see better stats on the extention wiring, than compared to the MS test socket. thought I had my understanding of attenuation and SNR backwards.

Yep, that is kind of puzzling :shrug:

I thought only AOL cocked regrades up, my line was regraded a few times after I joined them the other month.

You should find the attenuation goes up slightly when your sync is increased and the SNR margin will fall.
 
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I updated the routers firmware, and the stats improved slightly. so I took my comp down to the MS and took the stats from the router connected directly into the test socket. now with the routers updated firmware.

down / up
attenuation 7db / 1.5db
noise margin 31db / 28db

I get those stats from both the MS test socket and from the extention. obviously the router was reporting wrong figures somehow when it was connected to the MS test socket before the firmware upgrade. mystery solved
 
bloody hell, you staying in the exchange? if LLU (Be or Bulldog) is in your exchange you could get 24Mb EASILY :eek:
 
almost. I tried to rent a room inside it, but BT said they were full up :p

looked at 2 different sites, and the exchange is located in a different place on each site. would take me no more than 5 mins to walk to it at it's furthest location. :D

as for LLU. no chance of that here. live out in the sticks here broadband wise. at one point, never thought we would ever see it here. my exchange is schedualed for 21CN late 2011, so obviouly not a profitable region for broadband. :( still ADSLMAX is better than a slap round the chops. :)
 
as for LLU. no chance of that here. live out in the sticks here broadband wise. at one point, never thought we would ever see it here. my exchange is schedualed for 21CN late 2011, so obviouly not a profitable region for broadband. :( still ADSLMAX is better than a slap round the chops. :)

Hopefully we'll all be able to get ADSL2+ from BT sometime after they've rolled out 21CN.

Did you get the 21CN date from http://www.switchedonuk.org/home/when/ or samknows?

Switchedonuk has my exchange down for Apr-Jun 2009 but sam thinks it is not until Q4 2010.
 
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