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Telkom VDSL - Full speed local, terrible download international

calypso

Senior Member
Joined
Feb 10, 2009
Messages
985
#1
Posting here hoping someone can point me in the right direction. Its been 2-3 weeks and I have had 0 progress. I'll try keep it at brief as possible.

For years I have had a 10mb/s ADSL line, no issues just worked. Download at 1.1MB/s from international sites/usenet providers, ISP is WebAfrica (Capped). So I decided a little while ago to treat myself, asked Telkom to bump it up to 20mb/s . The day I made that change my international speeds dropped to 0.3MB/s. I was thinking that the line stats were a little marginal, so let's rather ask Telkom to change my 20mb/s profile from ADSL to VDSL. After 5 min of explaining I could see i was getting very vacant stares, so I just asked them to bump me up to 40mb/s knowing that its only possible on VDSL.

This is where is gets abit more interesting, at 40mb/s getting full line speed local, but still only 0.3mb download internationally, but I get a full 3mb/s up both local and international. My line stats are great. So i'm thinking maybe its the ISP? I try Afrihost and Telkom own test DSL account, but both have the exact same result as the WebAfrica account.

Eventually I get a Telkom techie out (they didn't want to book one as my line stats where too good), he calls me from the exchange to say he cant see an issue. After a lengthy talk describing the issue, he mentioned that he has another ticket from someone in the area with the exact same problem. So he solution is to run some tests and take that back to IT. That evening (Thursday) I come home and everything is dead, no internet, no sync, no line, not even a dial tone.
After a few calls, they have eventually got the internet back up today (Monday) but still the same problem of the slow international traffic persists.

Does anyone have any idea of what is actually going on and suggest a plan to rectify, this slow speeds are killing me. Hardware wise I dont think its an issue, got a clean network with a Billion 8800 VDSL modem and an Asus router managing everything.
I just don't know where to go next.
 

calypso

Senior Member
Joined
Feb 10, 2009
Messages
985
#2
Well I guess the lack of responses mean this isnt a common problem nor is it something obvious which needs to be changed.
 

ponder

Honorary Master
Joined
Jan 22, 2005
Messages
70,522
#3
The fact that you get the full 40Mb/s on local should tell you the line is fine and the issue is with your isp.

http://openserve.co.za/open/speed-test/

Run the Openserve Network Speed Test you will need these login details for your router to run the test, Username = admin and the Password = admin

Report back with the results.
 

calypso

Senior Member
Joined
Feb 10, 2009
Messages
985
#4
Will give it a bash, but I ran all these tests using Telkom/openserve test ISP accounts and other regular ISPs. Exact same outcome, 0.3mb/s download via international.
 

WaRLoRd ZA

Active Member
Joined
Mar 29, 2017
Messages
52
#5
I also don't get more than 10Mb/s down on international. I'm on 20Mbps VDSL it always hovers between 7-8 and doesn't get higher. I have tried web africa. Mweb. Telkom. I'm on axxess now. It's a little better but barely noticeable. I have friends who are also 20 VDSL but are much further away than me form exchange and they all get between 14-16 Mb/s down

IMG_20170908_075119.jpg
 

calypso

Senior Member
Joined
Feb 10, 2009
Messages
985
#7
Downstream Upstream
Line Coding (Trellis) On On
SNR Margin (dB) 11.8 29.4
Attenuation (dB) 0.0 0.0
Output Power (dBm) 14.2 -2.8
Attainable Rate (Kbps) 68896 34222
Rate (Kbps) 40956 3070
 

calypso

Senior Member
Joined
Feb 10, 2009
Messages
985
#8
Well my S/N ratio used to be a lot better (just over 20db) but looks like the last tech that knocked me offline for 4 days cocked that up.
Fibre just cant come sooner. Not quite sure why attenuation isn't showing anymore.
 

WaRLoRd ZA

Active Member
Joined
Mar 29, 2017
Messages
52
#10
Downstream Upstream
Line Coding (Trellis) On On
SNR Margin (dB) 11.8 29.4
Attenuation (dB) 0.0 0.0
Output Power (dBm) 14.2 -2.8
Attainable Rate (Kbps) 68896 34222
Rate (Kbps) 40956 3070
How far are you from the exchange? Your line stats seem fine for 40mbps. As i understand your SNR should drop when you increase your speed. So your stats are good. Anything above 8db should be stable. I do think my line is exposed somewhere along the 4 poles between mine and the drop down pole. When it rains or storms my line drops like a bag of S###..but techies only wanto come and fix when the line is broken. Not when it's half faulty.
 

calypso

Senior Member
Joined
Feb 10, 2009
Messages
985
#11
Untitled.jpg

Exchange is not far. In a townhouse complex and its right at the gate. Less than 100m as the crow flies.
 

beesboertjie

Senior Member
Joined
Jun 13, 2017
Messages
520
#12
Exchange is not far. In a townhouse complex and its right at the gate. Less than 100m as the crow flies.
Hi calypso. That maybe explains your attenuation of 0,0 dB. You stay directly next to the exchange, one can't get any closer than that. Attenuation is normally 13,8 dB for every km. 13,8 / 10 = 1,38 dB ... which is almost the same as your 0,0 dB.
 

Lishen23

Active Member
Joined
May 3, 2013
Messages
65
#15
Very interesting, I'm experiencing the exact same issue as the the two of you. Where are both of you based if you don't mind me asking?

It's weird, I used to get about a 6.5dB SNR downstream syncing at 20mbps previously and I had NO issues. My SNR has since jumped up to around 8-8.5dB, same 20mbps sync but I'm seeing a lot of packet loss, it's counterintuitive because higher SNR should mean more stability. I have no idea what's going on, I'd love to know if more people on VDSL are experiencing this issue as well.
 

Lishen23

Active Member
Joined
May 3, 2013
Messages
65
#16
I also don't get more than 10Mb/s down on international. I'm on 20Mbps VDSL it always hovers between 7-8 and doesn't get higher. I have tried web africa. Mweb. Telkom. I'm on axxess now. It's a little better but barely noticeable. I have friends who are also 20 VDSL but are much further away than me form exchange and they all get between 14-16 Mb/s down

View attachment 462887
Like looking at your line stats, you've been up for 30mins but you have quiet a few CRC errors (packet loss) can you do this, restart your router, then immediately run a local speed test. Go note your CRC errors. Then run an international speed test, note your CRC errors again.
 

WaRLoRd ZA

Active Member
Joined
Mar 29, 2017
Messages
52
#17
Like looking at your line stats, you've been up for 30mins but you have quiet a few CRC errors (packet loss) can you do this, restart your router, then immediately run a local speed test. Go note your CRC errors. Then run an international speed test, note your CRC errors again.
Will do bud. I'm in PE
 

WaRLoRd ZA

Active Member
Joined
Mar 29, 2017
Messages
52
#19
Like looking at your line stats, you've been up for 30mins but you have quiet a few CRC errors (packet loss) can you do this, restart your router, then immediately run a local speed test. Go note your CRC errors. Then run an international speed test, note your CRC errors again.
Done from PE. Errors didn't change.

IMG_20170919_183949.jpg IMG_20170919_183921.jpg IMG_20170919_183849.jpg
 

beesboertjie

Senior Member
Joined
Jun 13, 2017
Messages
520
#20
Why is it terrible? You are getting 37.24Mb/s and if one takes protocol overheads into consideration that is not bad. Think the max you will ever get is just over 38Mb/s
Hi ponder. calypso is happy with his 37.24Mbps. That is with a speed test to Cape Town. But with a speed test to London his download speed is only 0.3Mbps. That is why he’s saying, his international download speed is terrible. He wants to know why his local speed is good, but his international download speed is bad, very bad..
 
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