Line speed question

Forums › 2degrees (including Slingshot, Orcon, Flip, Stuff Fibre, MyRepublic, 2talk and Vocus) › Line speed question

forumusernz

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#35413 9-Jun-2009 19:55

Hi,

As this is my first post I am not sure whether this is in the correct forum.

I recently moved house and had to change plan (old one no longer exists). Old plan was 256K/128K, new one should be FS/128k. Speed tests before and after the move seem to be the same. I contacted Orcon helpdesk and they went through a number of diagnostics and proceeded to tell me that this was as fast as my line would go. I live in Hamilton so am not unbundled and use the Orcon supplied Speedstream 4200. I have tried connecting the laptop directly to the modem but nothing changed

What I want to ask is, can this be true?

When I talked to the helpdesk they got me to look at the following stats on the modem:

Status	ATU-C Current Tx Rate (bits/sec)	ATU-R Current Tx Rate (bits/sec)
UP	3360000	160000

System Time	Tx CRC	Tx FEC	Rx CRC	Rx FEC	LOS	SEF	LOS (sec)	SEF (sec)	Err (sec)	Rx (blocks)	Tx (blocks)	SNR	Atten.
06-09-2009 07:23:13GMT	1	0	0	2199	0	0	0	0	5719	100121	100121	12.0	45.5

My calculations suggest 3360000/1024/1024=3.2Mb/s (I think I am right here).

Also the SNR varies between 8 and 12, I know the lower is better but what is bad?

Thanks in advance

cyril7

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#223449 10-Jun-2009 07:26

Hi, welcome to GZ. your connection speed is infact 3.2MB/s which is a little on the light side for 45dB attenuation, but not unreasonable, and a hell of a lot different to 0.27Mb/s that you are getting as throughput. Have you tried other servers for speed tests and other times of the day.

Also what filters have you got setup and how many phones, have you tried an isolation test, this means removing all phones/fax/sky boxs from their sockets so only the modem is connected to the line.

Also 45db attenuation means roughly 3.2km of cable between you and the exchange. I realise you may not know what exchange you are connected to nor how the cable runs between your house and it, but does 3.2km sound right, if you think its significantly different then thats something else to concider.

Have you checked your address on the site below to see what it says.

http://www.telecomwholesale.co.nz/maps

Cheers
Cyril

forumusernz

20 posts

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#223568 10-Jun-2009 13:12

Cyril,

Thanks for your reply.

Yes I have tried other server and other times of the day, but with little difference (although I haven't tried recently (will do that tonight). I notice that browsing speeds have not changed much since the move either (although that is also depends on the other end).

I have one phone and one modem plugged into a filter that is plunged into the only phone jack in the house. No other devices use the phone line.

Thanks for the link, didn't know about that one. very useful!

I have no idea where the Hamilton East Exchange is located, but I am near the edge of Hamilton so 3km could be OK. I also noticed on the Telecom website that my house is in the middle of a green zone that represents a cabinet area however it also said:

This address is scheduled to be connected to a roadside cabinet using faster broadband equipment (ADSL2+ technology) by Oct 2010.

A pre-qualification check is required to determine what broadband services, if any, are available at this address.

Exchange Details

Exchange Area: Hamilton East
Projected ADSL2+ Upgrade: Oct 2007

Cabinet Details

Cabinet Name: HNE/P
Projected Cabinet Upgrade: Oct 2010

Thanks,

Ross

cyril7

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#223688 10-Jun-2009 17:48

Hi, well I would continue to complain to Orcon, it appears you have at least 3Mb/s of capacity to Hamilton East exchange and at most times of the day you should easily be able to achieve speedtest results within 80% of that (as its only 3mMb/s sync) to all NZ servers. Other than that there could be a problem with your PC or modem, ie firewalls effecting throughput or badly in need of service PC.

Cheers
Cyril

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#223890 11-Jun-2009 10:14

Based on your line stats, I can see lots of Errors and FEC failures. This would result in packet loss and bad performance.

I would say there is some sort of line noise on your line or a bad home setup with your phones.

This would also explain why your sync rate is alot lower than it should be.

Kyanar

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#224754 13-Jun-2009 22:35

I also have issues with low sync rates with Orcon as well. I was told by a Chorus tech resolving an issue a month ago that I should see improvements in performance (and Orcon agreed) as a result of cabinetisation in my area, but since that has happened I've LOST a considerable amount of sync rate!

Here's what I'm seeing (I've deliberately disabled ADSL2+ by the way, as that has an even LOWER sync rate!)

Line mode: G.DMT
Maximum line rate: 2144 kbps (downstream) / 1324 kbps (upstream)
Noise margin: 6.7 dB (downstream) / 13 dB (upstream)
Line attenuation: 42.3 dB (downstream) / 25 dB (upstream)
Output power: 18.1 dBm (downstream) / 12.5 dBm (upstream)

I should probably note that I'm using an Orcon BusinessHub and there is a single additional line being delivered over the connection, but I don't think that the status page excludes the additional line resources from the display.

cyril7

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#224813 14-Jun-2009 09:39

Hi, just a question, are you on an Orcon+ plan (ie LLU line on Orcon gear) or on a normal Orcon plan via Telecom wholesale.

If the former and your line now goes via a new cabinet then there are most likely issues due to the introduction of that cabinet, often to refered to as mid span injection. If that were the case then you would be well advised to change to a standard Orcon account via Telecom wholesale and get your DSL provisioned from that cabinet.

This all assumes you are on a Orcon+ plan.

Cyril

Kyanar

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#224951 14-Jun-2009 17:24

Indeed, Orcon LLU business plan. I'll call them on Monday and see what they can do.

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cyril7

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#225017 14-Jun-2009 20:25

Hi, as I said if you have been cabinetised but are not getting your DSL from the cabinet but from a DSLAM (either Telecoms or Orcons) in the upstream exchange then your connection will suffer performance due to interference from the louder signals of other customers that are being generated by the cabinet. The only solution is to be put back on a non LLU connection so that you are fed from the cabinet, the end result will be much improved.

Currently the rules allowing subLLU so that the likes of Orcon can put their gear in cabinets aswell (to overcome this issue) has not been finalised, so for now its better going back to a Telecom Wholesale via Orcon connection.

Cheers
Cyril

Kyanar

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#225220 15-Jun-2009 12:45

Well, apparently it's possible to do this, but the provisioning team needs to do some tests to assess whether it's something they SHOULD do. They'll get back to me in a couple of days.

forumusernz

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#225577 16-Jun-2009 12:59

I contacted Orcon helpdesk and logged a fault ticket, they got me to do a number of tests router factory reset, different filter, speed tests. The most interesting results according to the Orcon representative was the speed test to various different servers. We tested CHCH, Sydney, London and San Fran. All were about the same download speed (between 0.25 & 0.27 Mb/s), whith the fastest being San Fan. Apparently there should be a difference and the San Fran sped test should be the slowest.

How are non full speed plans capped, is it done by restricting the speed to the modem from the exchange or is it limited further down the line between the exchange and the internet?

Apologies to anyone here that has asked me if I had tried speed testing other servers, I have tried other nz servers and test providers but did not think of overseas servers.

With regard to Kyanar's issue, Cryil are you talking about the same thing as this Orcon link

http://www.orcon.net.nz/about/article/cabinetisation_what_does_it_mean_for_orcon_customers/

Thanks,
Ross

cyril7

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#225579 16-Jun-2009 13:09

With regard to Kyanar's issue, Cryil are you talking about the same thing as this Orcon link

Yep.

Cyril

forumusernz

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#227466 22-Jun-2009 18:39

All sorted!

After doing the large amounts of tests etc, I got an email saying that they passed the information onto the supplier (AKA Telecom) and they confirmed that I was on a 256/128 plan. Roll on unbundling!!!