Upload vs Download speed difference

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103 posts

Master Geek

#829655 2-Jun-2013 14:46

Thanks RunningMan & sorry Mauricio.

eme

103 posts

Master Geek

#829660 2-Jun-2013 15:08

Here are my modem stats:

kyhwana2

2566 posts

Uber Geek

#829663 2-Jun-2013 15:20

Right, the speedtest results are consistant with your sync rates then.. try doing everything peter robot says, could be bad internal wiring, etc.

RunningMan

8953 posts

Uber Geek

#829669 2-Jun-2013 15:33

That downstream attenuation is very high - getting near the limit of a usable ADSL connection. Where abouts are you (roughly) i.e. what suburb?

You either have some pretty awful wiring somewhere, or you are a good number of kms from the exchange or cabinet you are connected to.

If it's the first, then it's fixable, if it's the second, then there's some options to look at...

eme

103 posts

Master Geek

#829683 2-Jun-2013 15:54

In reply to your question RunningMan, my location is South Auckland rural, on main road, 4km from the Waiuku exchange & 500m from my cabinet. Wiring in the house is 4 years old. Filter is in place.

RunningMan

8953 posts

Uber Geek

#829686 2-Jun-2013 16:08

Are you sure you are connected to the cabinet 500m away? The 53dB attenuation suggests a distance of about 10 times that.

Drop your address in to the Chorus SAT http://www.chorus.co.nz/sat and see what throughput band (colour) it says for your address.

EDIT: I assume by filter, you mean a master filter? Or a plug in variety?

eme

103 posts

Master Geek

#830139 3-Jun-2013 17:52

Sbiddle, after reading your recent article about house wiring, I did an isolation test.
I have star wiring in my house and a separate jack for DSL.

One of the tests I did was with and without the Jack filter. From the results (below) I should be running without the filter?

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raytaylor

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#830150 3-Jun-2013 18:18

You only need a filter on jacks with telephones plugged into them.
Your ADSL modem can plug directly into the telephone jack, provided there is no telephone handset also plugged into the same jack.

If you have a master filter, then the ADSL jack will be dedicated, and all other telephones in the house can plug directly into their respective jacks without a filter.

Ray Taylor

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antoniosk

2358 posts

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#830176 3-Jun-2013 18:59

eme: Sbiddle, after reading your recent article about house wiring, I did an isolation test.
I have star wiring in my house and a separate jack for DSL.

One of the tests I did was with and without the Jack filter. From the results (below) I should be running without the filter?

It's been a while since I've looked at DSL of any type, but the unfiltered rates look a lot like what you would expect from ADSL1 and not 2+. I can't tell from the screenshot you posted about which mode your modem is connected to the DSLAM.

As per others advice, can you drop your address into the Chorus checker and have a look? I suspect you are not connected to the cabinet port but an exchange port, which for a 4km run will fallback to DSL1 (DSL2+ does not like long copper runs....)

________

Antoniosk

cyril7

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#830178 3-Jun-2013 19:08

Hi, looks to me as though you have the DSL modem on the Phone port of the filter, if so then you need to put it on the DSL port. Also as others have mentioned the filter actually needs to go on all the phone/voice devices, the modem infact connects directly to the phone line. If you pull a filter apart you will find the DSL port connects directly to the line in port, the phone port connects to the line in via a filter. So to clarify the filter must go between each and every phone/voice device, the DSL modem should connect to the DSL port of the filter, or directly to the a phone socket.

The ultimate solution is to have a master filter installed, this will isolate out a single socket for the DSL, all others will be phone/voice only.

Also, you now have 5dB of downstream attenuation, which indicates around 500m to the cabinet, but only 7Mb/s down, this means the house wiring is screwing things badly (so that master filter is needed) and/or your modem is not ADSL2+ capable, with 5dB downstream you should get >15Mb/s down.

Cyril

RunningMan

8953 posts

Uber Geek

#830181 3-Jun-2013 19:17

Two things really stand out strongly:

1) The attenuation dropping from 52 to 5 - that is monumental, and 5dB is in line with the 500m distance you thought from the cabinet. 5dB is about as good as it gets. The noise margin going up to 20dB indicates your connect speed is limited by the equipment at one end or the other, otherwise it would come down to about 12dB, and your sync rate would climb.

2) Your sync rate downstream of about 7000kb/s. Combined with the really high noise margin, this suggests that something is limiting you to ADSL (as opposed to ADSL2+) sync rates. This will either be your modem (check what the DSL modulation setting is, and let us know), or the exchange/cabinet has only ADSL equipment, or possibly a config error at the exchange end (not very likely).

Where to from here?

1) Check your DSL modulation setting in the modem - try ADSL2+ or multi-mode.

2) Leave the filter off the modem, you don't need it. Can you confirm that you have a dedicated ADSL jack? How do you get voice services - POTS, or VoIP?

EDIT: @cyril7 beat me to it while typing!

sbiddle

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#830193 3-Jun-2013 19:35

Seeing those results you've clearly got an issue somewhere with your wiring. I would also assume the 7161 is actually 7616.

7616 and 896 are the maximum sync speed for an ADSL1 connection so you're either on an ADSL1 only DSLAM (highly likely based upon your area) or on an ISAM and only set to an ADSL1 profile.

eme

103 posts

Master Geek

#830221 3-Jun-2013 20:38

Thanks all for having a look at my post and your suggestions.

1) antoniosk, the chorus site map just tell me >1 Mpbs, can’t see anything about DSL1/2.

I will investigate the cabinete vs exchange connection further.

My modem is Netgear DG834, advertised as ADSL2+.

ADSL setting is Auto (Multi-mode)

2) Cyril7, you a right I was using the phone port of the filter. Need to get another cable to change connection. I am not fussed abut having phone in the house, will get a master filter installed before I reconnect a phone. Netgear DG834 is advertised as ADSL2+.

3) RunningMan, modem is ADSL2+. In talking to the Chorus service man when he is working at my cabinet, I recall him telling me that the exchange side of my cabinet (replaced with a new one about 3 years ago) was modern (fibre), but the my copper side was old (probably still ADSL1?). I confirm that I have a dedicated ADSL jack. No other jacks are connected to anything at the moment (using mobile communication only).

4) Sbiddle, you are right the number is 7616 not 7161.

RunningMan

8953 posts

Uber Geek

#830222 3-Jun-2013 20:43

OK, if you have a dedicated ADSL jack, that means you already have a master filter.

You're getting the absolute maximum then for ADSL1 - pretty much perfect.

eme

103 posts

Master Geek

#830225 3-Jun-2013 20:56

So all I need to do know is to convince Chorus to upgrade my side of the cabinet. You laugh, however I was part of getting my old cabinet replace ahead of the Plan (in year 3000!)!

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