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Wannabe Geek


Topic # 143347 11-Apr-2014 16:16
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Hello everyone,

Here is my story.
Please don't stop reading half way, this could help you.

I have been with Telecom adsl2+ plan(s) since they introduced it.
Despite my Line Attenuation being 26.5dB, I was only getting ~6.5Mbps.
I do realise reaching theoretical speed is not possible and there is more to it than just Line Attenuation. i.e.) SNR, phone line quality, etc

Not long after joining the plan, I noticed my broadband speed was well below what it should be when I compared it with Theoretical Speed vs. Line Attenuation ADSL2+ chart, ~15Mbps for ~25dB.
Out of curiosity, I called Telecom at the time.
The response I got was that the line is working fine and that there are other factors that influence broadband speed, so I settled with the speed I was getting.

A few years passed which in that time I made numerous calls to Telecom due to minor broadband issues, but the broadband speed was steady.

This was till 3 months ago.

My broadband started syncing at 3Mbps, and when it did sync at 6.5Mbps the connection only lasted ~30minutes.
Response I got from Telecom when I called 1 month ago was "Turn off your modem for 5minutes, and turn it back on."
A single hard reboot did the trick, but the problem persisted after I hung up the phone.
I even tried different adsl2+ modem, but no improvement.
The lowest recorded speed was 1.7Mbps, which was this morning. (April 11th 2014)

I called Telecom again today, and a Chorus technician dropped by soon after to investigate.
Initially, his work seemed no different to all the technicians I had in the past.
All he told me was that all the lines are working fine, and it must be the house alarm that is causing interefence.
This was until he checked the street power pole just outside my house.
He told me that my phone line was stretched too tight to the power pole joint and the joint itself was also poorly positioned and damaged.

I checked my broadband speed after he finished repairing the joint and phone line.
I was shocked to see the broadband sync at 12Mbps.
It has been 2 hours since the technician left, and the connection is still solid.

I will need to give it more time to see whether the connection is stable or not.

My point is, don't settle for what Telecom tells you over the phone.
Those people only know as much as what ADSL2+ stats should look like, but thats about it.

Ask them to send a technician over if you are not satisfied and get them to investigate thoroughly.

I do not have a copy of my previous ADSL2+ statistics, but here is my current.

                                     DOWN     UP
Line Coding(Trellis):          On          On
SNR Margin (0.1 dB):        118         79
Attenuation (0.1 dB):        265        130
Output Power (0.1 dBm):   191       121
Attainable Rate (Kbps):    14052      748

Current Rate (Kbps):        12096    1049
 
As you can see Attainable is 14Mbps, but actual downstream rate is 12Mbps.


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  Reply # 1023519 11-Apr-2014 16:21
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Nice. It's good that you got a technician that cares, and knows his job.

Kudos to the Chorus tech.

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  Reply # 1023521 11-Apr-2014 16:24
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Great you speed has improved, but you would have likely had the same runaround with any ISP,

It was a Chorus Network Issue that resulted in your poor speeds, and eventually Chorus fixed it,

Can some omnipotent diety move this thread into the general broadband forum as the issue is probably pertanent to all wired broadband customers, not just Telecom ones... 

 
 
 
 




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  Reply # 1023523 11-Apr-2014 16:27
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I apologise if I posted this in wrong section, but you are right. This may apply to other ISPs as well.

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  Reply # 1023530 11-Apr-2014 16:38
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As I continually say, every house needs a Master Filter to get decent broadband.

Feel free to message me your phone number and I can run a line test and then tell if a Master Filter / Splitter would improve things even more.

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  Reply # 1023544 11-Apr-2014 17:23
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For what it's worth, I'm at 27 dB, have a master splitter, and get ~14.5 Mb/s synch rate. Presumably a splitter would eke a couple more Mb/s out of the OP's connection.

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  Reply # 1023546 11-Apr-2014 17:28
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Behodar: For what it's worth, I'm at 27 dB, have a master splitter, and get ~14.5 Mb/s synch rate. Presumably a splitter would eke a couple more Mb/s out of the OP's connection.


How much of a difference do filters make? Do you know your speed before it was installed? I get 13.5Mbps and have less than 2db, I have been told I should get amazing VDSL speeds but I still haven't got onto it.







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  Reply # 1023547 11-Apr-2014 17:30
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solaybro: Do you know your speed before it was installed?

Not for ADSL2+. I was still on ADSL1 when I installed it, which took me from 3 to 4.5 Mb/s (with a 54 dB attenuation). I believe that you should be getting in excess of 40 Mb/s at 2 dB, so I'd definitely suggest getting a splitter.

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Reply # 1023554 11-Apr-2014 17:43
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With downstream attenuation of 26.5dB, you need all the help you can get - get a master filter smile




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  Reply # 1023562 11-Apr-2014 18:17
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solaybro:
Behodar: For what it's worth, I'm at 27 dB, have a master splitter, and get ~14.5 Mb/s synch rate. Presumably a splitter would eke a couple more Mb/s out of the OP's connection.


How much of a difference do filters make? Do you know your speed before it was installed? I get 13.5Mbps and have less than 2db, I have been told I should get amazing VDSL speeds but I still haven't got onto it.


There's an alarm. And phones. I'd have no doubts about installing a master filter as well.







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Wannabe Geek


  Reply # 1023609 11-Apr-2014 20:56
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I tweaked snr of my modem and i could juice out extra ~2.5Mbps. I think 14.5Mbps is more than enough for me for the time being. XD

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  Reply # 1024051 12-Apr-2014 16:52
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Important to note that if the tech comes out and finds no fault you could be pinged a fee for that

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  Reply # 1024217 13-Apr-2014 00:04

Bandwidth(Up/Down)[kbps/kbps]: 1.053 / 6.902
Output Power (Up/Down) [dBm]: 12,2 / 18,6
Line Attenuation (Up/Down) [dB]: 18,1 / 38,5
SN Margin (Up/Down) [dB]: 11,9 / 12,0

I have above with a master splitter.
Speed down is 5.94 Mbps and up is 0.84Mbps.
Do you guys think that I should get Telecom/Chorus to do some tests?

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  Reply # 1024273 13-Apr-2014 08:51
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k1w1k1d: Bandwidth(Up/Down)[kbps/kbps]: 1.053 / 6.902
Output Power (Up/Down) [dBm]: 12,2 / 18,6
Line Attenuation (Up/Down) [dB]: 18,1 / 38,5
SN Margin (Up/Down) [dB]: 11,9 / 12,0

I have above with a master splitter.
Speed down is 5.94 Mbps and up is 0.84Mbps.
Do you guys think that I should get Telecom/Chorus to do some tests?


Stats without a location are meaningless. Your stats look good for your attenuation.

Do you fall into a 10Mbps or 20Mbps zone on the Chorus maps? If not there is very likely nothing wrong with your connection and you're simply too far from the cabinet or exchange to get speeds any faster.



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  Reply # 1024282 13-Apr-2014 09:27

Sorry.

>10Mbps
Bryndwr, Christchurch 8053.
Fendalton phone exchange. 1.2km direct line. 2.2km by road.

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  Reply # 1024301 13-Apr-2014 11:03
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plambrechtsen: As I continually say, every house needs a Master Filter to get decent broadband.

Feel free to message me your phone number and I can run a line test and then tell if a Master Filter / Splitter would improve things even more.


does this apply to non telecom customers?


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