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137 posts

Master Geek
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Topic # 81208 9-Apr-2011 10:03 Send private message

Our local school has switched to CallPlus from SchoolZone on another line and don't seem to be getting the speed you would expect. Line stats are fairly decent, e.g.

Line Rate
7616 Kbps
832 Kbps

Attainable Line Rate
10496 Kbps
1056 Kbps

Noise Margin
20.4 dB
14.0 dB

Line Attenuation
5.0 dB
4.0 dB

Output Power
9.8 dBm
11.9 dBm

and after a port reset last night interleaving has been turned off so pings are under 20ms for NZ speedtest.net sites.

Upload speeds are what you would expect, about 0.70Mbps but download speeds rarely break 1Mbps (though last night a couple of tests went through 2Mbps but I haven't seen that happen the few times I've checked in over the past week or so, and haven't seen it again). Speeds in the village are normally in the range of 3.5-4Mbps, ISPs delivering those sort of speeds include Telecom, Orcon and Xnet.

Something that I was wondering about is their wiring. They had a master splitter installed but did not get a dedicated jack point at that time. After a bit more to-and-fro-ing they got a dedicated jack but I'm wondering if it actually is, as when I went in the router was plugged in via a standard ADSL filter. I wasn't around for either of those installs and I'm wondering if that seems a little weird? The router works either plugged in to the filter or not (running the Slingshot speed test was actually a little slower without the filter), and again the line stats seem OK.

Does anyone have any insights they'd like to add?

edit: line stats table didn't survive post formatting.

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Uber Geek
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  Reply # 457096 9-Apr-2011 21:40 Send private message

What make/model of modem?

The line rate should be a lot higher for the low line attenuation.  I would suspect the modem or a wiring issue tbh.



137 posts

Master Geek
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  Reply # 457107 9-Apr-2011 21:58 Send private message

The modem is the Netcomm NB6Plus4 they provide, it has 3.66t firmware which isn't listed at the product site.

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Master Geek


  Reply # 457189 10-Apr-2011 10:58 Send private message

was going to post images but this forum stuffed them up and i lost the links now :/

BDFL
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  Reply # 457193 10-Apr-2011 11:02 Send private message

Adappted: was going to post images but this forum stuffed them up and i lost the links now :/


Hmmm. Sorry, the forum didn't do it. WE DO NOT SUPPORT BBCODES. THERE'S AN ICON FOR IMAGES IN THE RICH TEXT EDITOR. PEOPLE JUST HAVE TO USE IT.

And here is your image, which I inserted by simply clicking the button...






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  Reply # 457196 10-Apr-2011 11:05 Send private message

rhy7s: Speeds in the village are normally in the range of 3.5-4Mbps, ISPs delivering those sort of speeds include Telecom, Orcon and Xnet.


Are you comparing different ISPs? The results will vary. Each different ISPs have different contention rates (number of users over its capacity), different handovers, etc.

When testing speeds are you comparing local with local or international with international?

You are comparing Slingshot with Telecom? Sorry to bear bad news, but you won't get the same speed as Telecom or TelstraClear.






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Telecom NZ

  Reply # 457204 10-Apr-2011 12:09 Send private message

Your attainable shows the connection is ADSL2+ but the actual of 7616k shows that you are using an ADSL1 modem or that you have set the connect protocol to ADSL1



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Master Geek
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  Reply # 457228 10-Apr-2011 14:33 Send private message

freitasm:
Are you comparing different ISPs? The results will vary. Each different ISPs have different contention rates (number of users over its capacity), different handovers, etc.

When testing speeds are you comparing local with local or international with international?

You are comparing Slingshot with Telecom? Sorry to bear bad news, but you won't get the same speed as Telecom or TelstraClear.

It's been a while since I've been around a Slingshot connection, I might see if can get some more recent results from a couple of people I know in the area who are on Slingshot.

I've just been testing against the various North Island speedtest.net locations. They're all pretty consistently close to 1Mbps.

You'd think national traffic would still be a bit more decent than that, Xnet running 3-4 times faster certainly doesn't say much for CallPlus if it's the case. I recommended switching to a standard business Telecom plan from the previous SchoolZone connection but the school already had a relationship with CallPlus and they seem to target the education market at conferences.



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Master Geek
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  Reply # 457533 11-Apr-2011 15:06 Send private message

Seems to be running about 2.5Mbps today, will keep an eye on it.

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  Reply # 457576 11-Apr-2011 18:37 Send private message

dial up download speeds - experienced and expected: 5.3 to 5.8Kbps under a number of ISP's over the years


broadband:
fullspeed / highspeedwhat is it really?

recently another slingshot customer and I compared download speeds by downloading the same large file from the same site and we both got 2 different download speeds - mine were about 12 to 18KB/s maxing to about 22KB/s where the other customer were averaging 70 to 80KB/s.

 After much pondering i tried a download manager on the same file to open up multiple connections for the same file and  the individual segment download speed did not go over 25KB/s however the combined download speed averaged around 70KB/s.

why is it that speed tests show 1 to 2 Mb/s BUT any single download does not go over 23KB/s. Are each download through slingshot throttled?

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  Reply # 459240 15-Apr-2011 19:06 Send private message

tdgeek: Your attainable shows the connection is ADSL2+ but the actual of 7616k shows that you are using an ADSL1 modem or that you have set the connect protocol to ADSL1


+1

Test an ADSL2+ modem and see how it goes (people are saying good things about the TPLink modems), their current modem is likely to be getting old anyway. If you are having data errors then interleaving will help, but with your low attenuation I think should be ok. Output power shows its been automatically reduced to compensate for the low attenuation, so should get stable throughput.




Qualified in business, certified in fibre, stuck in copper, have to keep going  ^_^

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