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196 posts

Master Geek
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# 175134 18-Jun-2015 14:15
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I woke this morning to an alert that our internet connection went offline around 6:30am.

My first thought was 'bugger, that's going to foul up my nice current Draytek-130 48/10 modem connection'. Like most VDSL2 enthusiasts, I avoid rebooting my modem and it's a bit of a lucky dip if you get a good sync rate.

To my surprise I found that my connection was bumped up to the 17A profile with a 57.7 Mbps sync !...

System Uptime:229:10:46
LAN Status

VDSL Information:      VDSL Firmware Version:05-04-08-00-00-06
Mode:17A               State:SHOWTIME   TX Block:0     RX Block:0    
Corrected Blocks:0     Uncorrected Blocks:0    
UP Speed:10360000   Down Speed:57772000   SNR Margin:12  Loop Att.:11  > show adsl
  --------------------------- ATU-R Info (hw: annex A, f/w: annex Unknown) -----------
   Running Mode            :  unknown       State                : SHOWTIME
   DS Actual Rate          : 57772000 bps   US Actual Rate       : 10360000 bps
   DS Attainable Rate      :        0 bps   US Attainable Rate   :        0 bps
   DS Path Mode            :        Fast    US Path Mode         :        Fast 
   DS Interleave Depth     :        0       US Interleave Depth  :        0 
   NE Current Attenuation  :       11 dB    Cur SNR Margin       :       12  dB
   DS actual PSD           :    -4.-9 dB    US actual PSD        :    14. 5   dB
   ADSL Firmware Version   : 05-04-08-00-00-06 
  -------------------------------- ATU-C Info ---------------------------------
   Far Current Attenuation :        0 dB    Far SNR Margin       :       31  dB 

The most likely reason for this is that I moved the Draytek 130 modem from my office distribution cupboard out my large workshop where the ETP is 10 days ago to see what would happen if I reduced the loop by 81 meters.

For the last 12 months, the VDSL signal has been traveling an extra 81M from the master filter via a dedicated Cat6 to the office distribution cupboard where modem, Netgear R7000 router, switches and patch panels exist in my home office.

Prior to moving the modem (and for the last 12 months) the Draytek was reporting NE attenuation of 10dB and sync rate was normally around 48/10 Mbps.

After connecting the modem directly to the master splitter and then networking the modem back to the router via 100M of Cat6 Ethernet the sync rate only improved approx 1Mbps however, the attenuation dropped from 10db to 9dB.

The connection has been running like this for 10 days with actual speed tests of 45 Mbps down and 9.7 Mbps up on the 4B profile.

As of this morning, we now have speed test results of 53.7 Mbps down and 9.67 Mbps up. (Spark Auckland)

Considering that my property is a rural lifestyle block in Dairy Flat, Auckland with a 180M long driveway and approximately 380M - 400M of copper from the ETP to the cabinet, I'm pretty happy with these results!

My surprise was the fact that I never expected to get a 17A profile based on the reported attenuation of 9-10db and SNR of 12.

Thank you DLM (or to the Chorus tech who bumped the profile) - Long may it last.

(Edit: Formatting)

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Uber Geek
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  # 1327328 18-Jun-2015 14:15
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Hello... Our robot found some keywords in your post, so here is an automated reply with some important things to note regarding broadband speeds.



If you are posting regarding DSL speeds please check that



- you have reset your modem and router



- your PC (or other PCs in your LAN) is not downloading large files when you are testing


- you are not being throttled by your ISP due to going over the monthly cap



- your tests are always done on an ethernet connection to the router - do not use wireless for testing



- you read this topic and follow the instructions there.



Make sure you provide information for other users to help you. If you have not already done it, please EDIT your post and add this now:



- Your ISP and plan



- Type of connection (ADSL, ADSL2, VDSL)



- Your modem DSL stats (do not worry about posting Speedtest, we need sync rate, attenuation and noise margin)



- Your general location (or street)



- If you are rural or urban



- If you know your connection is to an exchange, cabinet or conklin



- If your connection is to a ULL or wholesale service



- If you have done an isolation test as per the link above



Most of the problems with speed are likely to be related to internal wiring issues. Read this discussion to find out more about this. Your ISP is not intentionally slowing you down today (unless you are on a managed plan). Also if this is the school holidays it's likely you will notice slower than usual speed due to more users online.



A master splitter is required for VDSL2 and in most cases will improve speeds on DSL connections. Regular disconnections can be a monitored alarm or a set top box trying to connect. If there's an alarm connected to your line even if you don't have an alarm contract it may still try to connect so it's worth checking.



I recommend you read these two blog posts:



- Is your premises phone wiring impacting your broadband performance? (very technical)



- Are you receiving a substandard ULL ADSL2+ connection from your ISP?

I am the Geekzone Robot and I am here to help. I am from the Internet. I do not interact. Do not expect other replies from me.

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