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 
6762 posts

Uber Geek
+1 received by user: 634

Trusted
Subscriber

  # 255949 15-Sep-2009 20:27
Send private message

Hi, if you are only 4houses away then I would expect a cable length less than 300m even if there was a convoluted cable run across the street, up the other end of the sub division and back again I would doubt you would be more than 1km of cable from the cabinet. In which case the reported line attenuation of 36dB (approx 2.6km of cable) indicates there is a bad joint or some device across the line (alarm system perhaps?).

Does your modem give error stats as well, this may show if there are packets begin dropped and retried which would indicate some other line related issue, ie loss or noise, this would cause sporadic lagging.

I must stress that internet performance will dramatically improve when going from a direct exchange connection to a cabinet due to a reduction in line length, if not then purhaps there is a poor joint or MDF jumpering thats creating an abnormally high line attenuation and purhaps packet loss.

The erratic change in sync speed indictates some erratic line condition, once again I suspect a bad joint somewhere purhaps this poor connection was created (accidentially) in the change over to the cabinet, not the first time I have dealt with such a issue.

If you are under 1km of cable from the cabinet you should expect sync speeds of 15Mb/s or better, not 10Mb/s.

Cyril



Tel69
256 posts

Ultimate Geek
+1 received by user: 4

Trusted
Lifetime subscriber

  # 256217 16-Sep-2009 17:14
Send private message

Hi Cyril,

Spoke with Telecom help desk for an hour roughly.
The first level tech was trying his best (And doing a pretty good job for level 1) however the team leader that I got for the last 5 minutes did not impress me. (Started being VERY agressive demanding to know who I'd been talking to in Chorus, telling me to get them to ring him, not giving me a reference number until I forced the issue). They also tried to lock me into another 24 months with Telecom to get a new free wireless modem (The Thompson ones).
When I enquired if it would fix the problem they said they didn't know. So needless to say I explained not to try and lock me into another 24 months as if it's a fault with the modem, then it's still under warantee and hence I get a new modem anyway.

UP shot of that phone call, (And my complaint about the agressiveness of the team leader towards me) was I had Tony from Telecom ring me, and apologise, then confirm I am on the cabinet (I wasn't when I had rung the help desk, out by 1 day)
So now my line attenuation is looking alot better, however there is something that sticks in my mind.
Heres my current stats.

Item               Downstream      Upstream      Unit
SNR Margin        12                    12              dB
Line Attenuation 6                      1                dB
Data Rate          14014               684            kbps

That is a good increase from 10,000, however on the Tuesday morning I was consistantly getting a downstream data rate of over 17,000 (Even retraining the ADSL 4-7 times).
14,000 kbps I'm not argueing with, BUT from the early morning of cut over syncing at over 17 constatantly to now getting a consistant 14 seems strange (It varies but only down to 13, and not above 14).

Oh, and the modem (on the web front end) just gives ADSL Rx and Tx error counts (Which are zero), I'll telnet into busybox on it and start remembering my linux commands and get some decent stats from the interface.

Cheers,
Tel

 
 
 
 




Tel69
256 posts

Ultimate Geek
+1 received by user: 4

Trusted
Lifetime subscriber

  # 256237 16-Sep-2009 18:03
Send private message

Nothing in busybox on the dlink seems to be indicating an issue (I removed the all 0 if's like lo and br1) .

# ifconfig
br0 Link encap:Ethernet HWaddr 00:22:B0:43:EF:5D
inet addr:10.1.1.1 Bcast:10.255.255.255 Mask:255.0.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 ASYMMTU:1500
RX packets:5864 errors:0 dropped:0 overruns:0 frame:0
TX packets:6057 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:847911 (828.0 kb) TX bytes:2668303 (2.5 Mb)

eth0 Link encap:Ethernet HWaddr 00:22:B0:43:EF:5D
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 ASYMMTU:1500
RX packets:5885 errors:0 dropped:0 overruns:0 frame:0
TX packets:6039 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:849861 (829.9 kb) TX bytes:2667200 (2.5 Mb)

ppp0 Link encap:Point-Point Protocol
inet addr:125.236.183.19 P-t-P:210.55.69.232 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 ASYMMTU:1500
RX packets:8574 errors:0 dropped:0 overruns:0 frame:0
TX packets:3588 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:2510256 (2.3 Mb) TX bytes:492532 (480.9 kb)

wlan0 Link encap:Ethernet HWaddr 00:22:B0:43:EF:5E
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 ASYMMTU:1500
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:234 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:0 (0.0 b) TX bytes:62412 (60.9 kb)


And the output from cat /proc/avalanche/avsar_modem_stats

# cat /proc/avalanche/avsar_modem_stats

AR7 DSL Modem Statistics:
--------------------------------
[DSL Modem Stats]
US Connection Rate: 684 DS Connection Rate: 14014
DS Line Attenuation: 6 DS Margin: 12
US Line Attenuation: 1 US Margin: 12
US Payload : 757296 DS Payload: 3190320
US Superframe Cnt : 296745 DS Superframe Cnt: 296745
US Transmit Power : 12 DS Transmit Power: 16
LOS errors: 0 SEF errors: 0
Frame mode: 0 Max Frame mode: 0
Trained Path: 0 US Peak Cell Rate: 1613
Trained Mode: 16 Selected Mode: 1
ATUC Vendor Code: 4244434D ATUC Revision: 2
Hybrid Selected: 4 Trellis: 1
Showtime Count: 1 DS Max Attainable Bit Rate: 14996 kbps
BitSwap: 1 US Max Attainable Bit Rate: 684000 bps
Annex: AnxA psd_mask_qualifier: 0x0000
ATUC ghsVid: b5 00 42 44 43 4d 91 91
T1413Vid: 00 00 T1413Rev: 00 VendorRev: 00
ATUR ghsVid: 00 44 4c 69 6e 6b 00 00
T1413Vid: 00 00 T1413Rev: 00 VendorRev: 00

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

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

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

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

[ATM Stats]
[Upstream/TX]
Good Cell Cnt: 15777
Idle Cell Cnt: 8133645


[Downstream/RX)]
Good Cell Cnt: 66465
Idle Cell Cnt: 166672154
Bad Hec Cell Cnt: 0
Overflow Dropped Cell Cnt: 0

[SAR AAL5 Stats]
Tx PDU's: 4121
Rx PDU's: 9253
Tx Total Bytes: 575645
Rx Total Bytes: 2816956
Tx Total Error Counts: 0
Rx Total Error Counts: 0


[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=15

6762 posts

Uber Geek
+1 received by user: 634

Trusted
Subscriber

  # 256284 16-Sep-2009 21:32
Send private message

Hi, so it seems you now have a 6dB attenuation and only 14Mb/s and no packet errors. So I would suggest that any major issues regarding your cabinet are non existant however any lagging may be an issue for your ISP.

My only concern is 6dB attenuation should see you with a sync rate more like 18Mb/s, therefore you may still have house wiring issues.

Cyril

22260 posts

Uber Geek
+1 received by user: 4784

Trusted
Subscriber

  # 256315 16-Sep-2009 22:41
Send private message

Margin of 12 seems excessive. I have never seen it that high even on crap lines.. Sits on 6 for me, but with one of those apps I was able to drop it to 3 to get a bit more speed out of the connection.

If anyone knows how to set it on a AR7 I would love to know...




Richard rich.ms

22260 posts

Uber Geek
+1 received by user: 4784

Trusted
Subscriber

  # 256322 16-Sep-2009 23:05
Send private message

Argh, just checked my router and i'm on 8 and 12 - its my old dynalink that would pick 6 and then let me adjust it downwards.




Richard rich.ms

1 | 2 | 3 
View this topic in a long page with up to 500 replies per page Create new topic



Twitter and LinkedIn »



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 »

Dunedin selects Telensa to deliver smart street lighting for 15,000 LEDs
Posted 18-Jul-2019 10:21


Sprint announces a connected wallet card with built-in IoT support
Posted 18-Jul-2019 08:36


Educational tool developed at Otago makes international launch
Posted 17-Jul-2019 21:57


Symantec introduces cloud access security solution
Posted 17-Jul-2019 21:48


New Zealand government unveils new digital service to make business easier
Posted 16-Jul-2019 17:35


Scientists unveil image of quantum entanglement
Posted 13-Jul-2019 06:00


Hackers to be challenged at University of Waikato
Posted 12-Jul-2019 21:34


OPPO Reno Z now available in New Zealand
Posted 12-Jul-2019 21:28


Sony introduces WF-1000XM3 wireless headphones with noise cancellation
Posted 8-Jul-2019 16:56


Xero announces new smarter tools, push into the North American market
Posted 19-Jun-2019 17:20


New report by Unisys shows New Zealanders want action by social platform companies and police to monitor social media sites
Posted 19-Jun-2019 17:09


ASB adds Google Pay option to contactless payments
Posted 19-Jun-2019 17:05


New Zealand PC Market declines on the back of high channel inventory, IDC reports
Posted 18-Jun-2019 17:35


Air New Zealand uses drones to inspect aircraft
Posted 17-Jun-2019 15:39


TCL Electronics launches its first-ever 8K TV
Posted 17-Jun-2019 15:18



Geekzone Live »

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


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



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.