Important notes when upgrading to VDSL2 Modem Routers

MightyQuin said:
I was told today that if I upgrade from my ADSL2+ to VDSL, it will only increase my upload speed and have no effect on my download speed. This by WA.

Don't know what to do anymore. I have a brand new line pulled into my house. Four teams have been here to test. I am 837m from a brand new upgraded exchange and they say my noise is too borderline, and that is why I only get 15Mb downstream speed instead of 20Mb.
My stats:

View attachment 403210

I need someone's opinion please.
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Your Attenuation is only 2dB higher than mine but my SNR is almost 5 times higher, the line from your house to the pole might be brand new but from the pole to the exchange somewhere a connection isn't what it should be.

Alternatively the connection from the pole to your house might be brand new but from entering the house to the modem the connection maybe isn't what it should be.

It might be worth it to plug the modem in directly where the line comes into the house just to eliminate the second one.

Edit: I just noticed you are on ADSL2+, do you have a VDSL modem?
 
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Soul Assassin said:
Your Attenuation is only 2dB higher than mine but my SNR is almost 5 times higher, the line from your house to the pole might be brand new but from the pole to the exchange somewhere a connection isn't what it should be.

Alternatively the connection from the pole to your house might be brand new but from entering the house to the modem the connection maybe isn't what it should be.

It might be worth it to plug the modem in directly where the line comes into the house just to eliminate the second one.

Edit: I just noticed you are on ADSL2+, do you have a VDSL modem?
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This is a brand new area...6 years old. All lines are in Telkom conduits/ducting. Nothing on poles.
And yes I have a VDSL modem. A TP-LINK Archer VR900. It is set on ADSL though, not VDSL.

I will plug directly onto where the Telkom line terminates in my kitchen and test tomorrow. I do have my router on a 20m extension cord, but techies said the noise is between my house and exchange somewhere.
 
MightyQuin said:
This is a brand new area...6 years old. All lines are in Telkom conduits/ducting. Nothing on poles.
And yes I have a VDSL modem. A TP-LINK Archer VR900. It is set on ADSL though, not VDSL.

I will plug directly onto where the Telkom line terminates in my kitchen and test tomorrow. I do have my router on a 20m extension cord, but techies said the noise is between my house and exchange somewhere.
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Have you considered switching to VDSL, I had horrible SNR figures with a techie coming out and changing everything, including replacing every point inside the house, completely replacing the cable from the pole to the house and checking all connections from my house to the MSAN.

All that did nothing, my SNR was the bare minimum of 6.0dB. I then changed over to VDSL about two weeks later and my SNR went up to 30dB just by changing from ADSL2+ to VDSL2.
 
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Soul Assassin said:
Have you considered switching to VDSL, I had horrible SNR figures with a techie coming out and changing everything, including replacing every point inside the house, completely replacing the cable from the pole to the house and checking all connections from my house to the MSAN.

All that did nothing, my SNR was the bare minimum of 6.0dB. I then changed over to VDSL about two weeks later and my SNR went up to 30dB just by changing from ADSL2+ to VDSL2.
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Changing the router setting or actually upgrading your profile with Telkom to VDSL ?
 
Got my DSL-224 today and switched from ADSL to VDSL (20Mbps line), it was quite a mission to get done but the online chat got it done eventually.

I experienced a slight improvement in both download and upload speeds but my latency got worse

ADSL
Adsl Line Status SHOWTIME.
Adsl Mode VDSL2-17A AnnexB
Channel Mode Interleave
Up Stream 1204 kbps
Down Stream 20191 kbps
Attenuation Down Stream 42
Attenuation Up Stream 13
SNR Margin Down Stream 6.2
SNR Margin Up Stream 6.4
Vendor ID RETK
Firmware Version v134g113
CRC Errors 0
Up Stream BER 0e-7
Down Stream BER 0e-7
Up Output Power 5
Down Output Power 14
ES 0
SES 0
UAS 199

Speedtest
TEST_DATE DOWNLOAD_MEGABITS UPLOAD_MEGABITS LATENCY_MS SERVER_NAME
2016/12/08 3:15 17.51 0.88 9 Midrand
2016/12/08 10:00 17.5 0.84 8 Midrand
2016/12/08 16:36 18.67 1.12 27 Midrand
2016/12/08 16:45 18.93 1.09 26 Midrand
2016/12/08 16:59 18.94 1.09 26 Midrand

How do they separate 20Mbps from 40Mbps, If I check on Openserve there are houses in my street that are 40Mbps enabled.
 
Umzimbeet said:
Got my DSL-224 today and switched from ADSL to VDSL (20Mbps line), it was quite a mission to get done but the online chat got it done eventually.

I experienced a slight improvement in both download and upload speeds but my latency got worse

ADSL
Adsl Line Status SHOWTIME.
Adsl Mode VDSL2-17A AnnexB
Channel Mode Interleave
Up Stream 1204 kbps
Down Stream 20191 kbps
Attenuation Down Stream 42
Attenuation Up Stream 13
SNR Margin Down Stream 6.2
SNR Margin Up Stream 6.4
Vendor ID RETK
Firmware Version v134g113
CRC Errors 0
Up Stream BER 0e-7
Down Stream BER 0e-7
Up Output Power 5
Down Output Power 14
ES 0
SES 0
UAS 199

Speedtest
TEST_DATE DOWNLOAD_MEGABITS UPLOAD_MEGABITS LATENCY_MS SERVER_NAME
2016/12/08 3:15 17.51 0.88 9 Midrand
2016/12/08 10:00 17.5 0.84 8 Midrand
2016/12/08 16:36 18.67 1.12 27 Midrand
2016/12/08 16:45 18.93 1.09 26 Midrand
2016/12/08 16:59 18.94 1.09 26 Midrand

How do they separate 20Mbps from 40Mbps, If I check on Openserve there are houses in my street that are 40Mbps enabled.
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Maybe , with a bit of luck, the two services are on a different MSAN/ISAM/ISAN, whatever in the exchange. But realistically, your line is either terminated on a 20 Mbps card or on a 40 Mbps card or just a different port.

What were you stats like before the conversion to VDSL2? You can see how this was implemented. Telkom used their auto systems to keep adjusting performance until they could not push it any further without dropping below a 6dB Noise Margin.

What I would like to see is what will happen if they were to/could go back to a non-interleaved path mode, without adjusting anything. I would like to see some sensitivity testing, or what is called compression testing in the satellite world, where a response curve is calculated and an ideal working point is established which is the best balance of all the parameters.

BUT, can you see Telkom wanting spend the time doing such an exercise?
 
My ADSL stats were:

Up Stream 1203 kbps
Down Stream 20479 kbps
Attenuation Down Stream 25.5
Attenuation Up Stream 14.9
SNR Margin Down Stream 8.3
SNR Margin Up Stream 13.2

I'll try and engage with Telkom and see where I get.

In the meantime I'll also give the bridge mode a go and see if that improves anything.

Thanks for the feedback
 
So no real improvement in upload and download data rates exchanged for a worse latency and a borderline Noise margin situation?

What was the latency before? Not worth the upgrade in my opinion, exposing yourself to more noise because of the wider bandwidth used by VDSL2 ....

Either that or the implementation and configuration done by Telkom is really bad.

I another post, I took a hammering from some for suggesting that an upgrade to VDSL does not guarantee better performance ......

See what I mean now?
 
Any recommended router? upgrading line to vdsl in the new year

Screen Shot 2016-12-12 at 5.36.49 PM.png
 
After my Asus-DSL N66U got fried by ????? and now wont sync up with the exchange, everything works fine :cry:
Replaced it with a DLINK - DSL-G225

Following Stats
ct04rLe.png

Feels like i'm hanging on by a thread
 

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brentg said:
Any recommended router? upgrading line to vdsl in the new year
Click to expand...

Damn if you spit out the front door you will probably hit the MSAN or exchange.....

40Mbps VDSL EASY with plenty room to spare!
 
cavedog said:
Damn if you spit out the front door you will probably hit the MSAN or exchange.....

40Mbps VDSL EASY with plenty room to spare!
Click to expand...

haha yeah its like literally on the corner.

Looking for a decent vdsl router that will make use of my line speed
 
Netgear Router

KOPITE said:
Please post your brand router and line stats if possible for comparisons

Router - Make, Model chipset
Modulation - ADSL, ADSL2+, VDSL
Line stats - SNR & Attenuation
Distance from Exchange
Click to expand...

1.3km from exchange
Netgear DGN2660


Show Statistics


System Up Time 39 days 23:27:23
Port Status TxPkts RxPkts Collisions Tx B/s Rx B/s Up Time
WAN ADSL Link 22611996 31430721 0 291 127 9 days 04:50:28
LAN1 1000M/Full 125515883 88395669 0 540 1122 11 days 03:34:33
LAN2 1000M/Full 39 days 23:27:23
LAN3 Link Down --
LAN4 1000M/Full 39 days 23:27:23
2.4G WLAN b/g/n 300M 37778731 25720137 0 856 1119 39 days 23:27:23

ADSL Link Downstream Upstream
Connection Speed 22522 kbps 2048 kbps
Line Attenuation 26.7 db 0.0 db
Noise Margin 18.4 db 26.5 db
 
Router - MWeb Technicolor TG589vn v3
Modulation - ADSL2+ - ITU-T G.992.5 Annex A (ADSL2+ over POTS)
Line Stats:
Bandwidth (Up/Down) [kbps/kbps]: 1.022 / 20.477
Line Attenuation (Up/Down) [dB]: 9,9 / 16,5
SN Margin (Up/Down) [dB]: 8,7 / 7,0
Chipset Vendor ID (Local/Remote): BDCM / BDCM

Distance from Exchange - Not sure. I've calculated about 850m to the actual Telkom building, but there is a small white Telkom box about halfway there, so not sure whether there is an MSAN there, or not.

My concern is this:
Error Seconds (Local/Remote): 171 / 0
FEC Errors (Up/Down): 17.070 / 16.174.565
CRC Errors (Up/Down): 0 / 283
HEC Errors (Up/Down): 0 / 3.440
Uptime: 7 days, 0:55:20

Not sure I should be getting that many errors (even over 7 days).
 
So, it seems I'm too far from my exchange to upgrade to 40MB VDSL... :cry:

Guess I'll have to wait for the fabled Fibre to reach my area for better service.
 
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