Latency on 4 Mbps adsl

jphegers said:
have you tried to run Zertops line test tool? Usefule to eliminate any issues with your ADSL connection.
http://mybroadband.co.za/vb/showthre...1#post12372998

Cant get into site .....This site can’t be reached

zertop.com’s server DNS address could not be found.
Click to expand...

That looks like you might have been changed to interleave.
Could you ping bras.afrihost.com so that we can rule out the exchange. (bras.afrihost.com is a device sitting just behind the exchange, should be under ~25-30ms.)
 
Johnatan56 said:
That looks like you might have been changed to interleave.
Could you ping bras.afrihost.com so that we can rule out the exchange. (bras.afrihost.com is a device sitting just behind the exchange, should be under ~25-30

Microsoft Windows [Version 10.0.14393]
(c) 2016 Microsoft Corporation. All rights reserved.

C:\Users\John>tracert bras.afrihost.com

Tracing route to bras.afrihost.com [155.239.255.250]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 192.168.1.1
2 40 ms 37 ms 37 ms 155.239.255.250

Trace complete.

C:\Users\John>
Click to expand...
 
Johnatan56 said:
That looks like you might have been changed to interleave.
Could you ping bras.afrihost.com so that we can rule out the exchange. (bras.afrihost.com is a device sitting just behind the exchange, should be under ~25-30ms.)
Click to expand...

If I tracert to bras.afrihost.com on my connection I have never got values of worse than 10 ms. Why do you indicate the 25 to 30 ms is considered normal? Is the difference solely attributable to connections set on interleaved?

Why does Telkom to change a connection to interleaved anyway?
 
jphegers said:
have you tried to run Zertops line test tool? Usefule to eliminate any issues with your ADSL connection.
http://mybroadband.co.za/vb/showthre...1#post12372998

Cant get into site .....This site can’t be reached

zertop.com’s server DNS address could not be found.
Click to expand...

I have reported the broken link to Zertop. I have found the tool very useful in the past, and have solved numerous connectivity issues with the help of the tool.

The basis of the tool is a ping test/trace route to bras, regardless of which ISP is delivering the service.
 
jphegers said:
Code: 
Tracing route to bras.afrihost.com [155.239.255.250]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  192.168.1.1
  2    40 ms    37 ms    37 ms  155.239.255.250

Trace complete.
Click to expand...

That's quite high, would you please give your line stats as well?
Also looking for something along the lines of interleave depth if you're able to find it under the stats page.

Geoff.D said:
If I tracert to bras.afrihost.com on my connection I have never got values of worse than 10 ms. Why do you indicate the 25 to 30 ms is considered normal? Is the difference solely attributable to connections set on interleaved?

Why does Telkom to change a connection to interleaved anyway?
Click to expand...
It depends on your distance to the exchange and modulation type, my average is about 22ms at 3km, you're probably at <1.5km and therefore get 10ms. VDSL would also decrease it.

Interleave versus Fast Path.
Interleave is to help with line stability, it syncs a little bit higher (usually about 20%), and does error correction on all packages. This adds 15-20ms delay between the exchange and your house.
Fast path just lets the packets through without inspection for errors, this will have the lowest latency.
 
Johnatan56 said:
That's quite high, would you please give your line stats as well?
Also looking for something along the lines of interleave depth if you're able to find it under the stats page.


It depends on your distance to the exchange and modulation type, my average is about 22ms at 3km, you're probably at <1.5km and therefore get 10ms. VDSL would also decrease it.

Interleave versus Fast Path.
Interleave is to help with line stability, it syncs a little bit higher (usually about 20%), and does error correction on all packages. This adds 15-20ms delay between the exchange and your house.
Fast path just lets the packets through without inspection for errors, this will have the lowest latency.
Click to expand...

As i said before i am technically handicapped so what do i do to get my line stats?
 
jphegers said:
As i said before i am technically handicapped so what do i do to get my line stats?
Click to expand...

Log into your router, you're looking for a statistics page. If you give your router model, we can direct you more easily.
On this page it should say Attenuation and then two numbers, SNR or Noise Margin and two numbers, it will also have, if you have 2Mbps, 2048Kbps or close to it, for 4 Mbps, 4096Kbps or close to it, etc.

(to log into your router:
hit the windows key + r, type in cmd and hit enter. Type ipconfig and hit enter. Look for Default Gateway, in my case it's 192.168.1.1, type that into your browser and hit enter. At the login page try your router's default username/password (Google your router's defaults) and explore.)
 
Johnatan56 said:
Log into your router, you're looking for a statistics page. If you give your router model, we can direct you more easily.
On this page it should say Attenuation and then two numbers, SNR or Noise Margin and two numbers, it will also have, if you have 2Mbps, 2048Kbps or close to it, for 4 Mbps, 4096Kbps or close to it, etc.

(to log into your router:
hit the windows key + r, type in cmd and hit enter. Type ipconfig and hit enter. Look for Default Gateway, in my case it's 192.168.1.1, type that into your browser and hit enter. At the login page try your router's default username/password (Google your router's defaults) and explore.)
Click to expand...

i am in my router wich is a linkses, but cannot see statistics page?
these are the options in router menu.......'
Setup
Linksys X1000 X1000
Setup Wireless Security Access Policy
Applications &
Gaming
Administration
Status
Basic Setup | IPv6 Setup
|

DDNS
|

MAC Address Clone
|

Advanced Routing
 
Last edited:
this is all that appears under status.

Firmware Version: v1.0.01 build 005 Jan 12, 2015
Firmware Verification: a497e55da1e2c26eedf062947ea314f9
Current Time: 2016-12-08 13:26:52
Internet MAC Address: c0:56:27:d6:e3:28
Device Name:
Linksys X1000


Host Name:
Linksys01791


Domain Name:




Internet Connection




Connection Type: RFC 2516 PPPoE
Login Status: Connected Disconnect
Internet IP Address:
Subnet Mask: 255.255.255.255
Default Gateway:
DNS 1: 169.1.1.1
DNS 2: 8.8.8.8
DNS 3: 0.0.0.0
MTU: 1492



Internet IPv6 Connection


Connection Type: IPv6 - Automatic

Internet IPv6 Address: N/A

Default Gateway: N/A

DNS1: N/A

DNS2: N/A

DNS3: N/A

DHCP Lease Time:
 
Last edited by a moderator:
Johnatan56 said:
It depends on your distance to the exchange and modulation type, my average is about 22ms at 3km, you're probably at <1.5km and therefore get 10ms. VDSL would also decrease it.

Interleave versus Fast Path.
Interleave is to help with line stability, it syncs a little bit higher (usually about 20%), and does error correction on all packages. This adds 15-20ms delay between the exchange and your house.
Fast path just lets the packets through without inspection for errors, this will have the lowest latency.
Click to expand...

Thanks for the link and explanation. I think what is saving me is the fact that I am using such an old ADSL modem and router. Telkom apparently tried to reconfigure my line and could not get it to work. They phoned me and wanted to know why I do not use the router that is associated with my profile. I played dumb and said I don't knw what they are talking about, gave them the detail of my router and then got the response that as they are unable to remotely reconfigure it, they will leave my settings as is!

I like it that way ----
 
Try the administration option. There may be some more options available there. Somewhere you should be able to get the values we are looking for.
 
Geoff.D said:
Thanks for the link and explanation. I think what is saving me is the fact that I am using such an old ADSL modem and router. Telkom apparently tried to reconfigure my line and could not get it to work. They phoned me and wanted to know why I do not use the router that is associated with my profile. I played dumb and said I don't knw what they are talking about, gave them the detail of my router and then got the response that as they are unable to remotely reconfigure it, they will leave my settings as is!

I like it that way ----
Click to expand...
I prefer fast path as well, I'm a gamer. :p
@jphegers
You're looking for something like this:
Code: 
Uptime:    0 days, 0:23:22
Modulation:    G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]:    723 / 2.455
Data Transferred (Sent/Received) [KB/KB]:    0,00 / 0,00
Output Power (Up/Down) [dBm]:    9,5 / 0,0
Line Attenuation (Up/Down) [dB]:    11,0 / 28,0
SN Margin (Up/Down) [dB]:    19,0 / 23,0
Vendor ID (Local/Remote):    TMMB / IFTN
Loss of Framing (Local/Remote):    0 / 0
Loss of Signal (Local/Remote):    0 / 0
Loss of Power (Local/Remote):    0 / 0
Loss of Link (Remote):    0
Error Seconds (Local/Remote):    0 / 0
FEC Errors (Up/Down):    0 / 70.327
CRC Errors (Up/Down):    0 / 0
HEC Errors (Up/Down):    0 / 0
but following this thread: https://community.linksys.com/t5/Cable-and-DSL/X1000-Dsl-Stats/td-p/589614
you don't have line stats within the UI, strange, first I've ever heard of a modem not having it.
Follow this: http://rainbow.chard.org/2013/06/04/how-to-get-line-stats-out-of-a-linksys-x3500/
This is Putty, this is the direct download.
 
@OP

As a few others have already said, your latency has increased because your DSL sync is now on interleave path (as opposed to FastPath). This is because a system that Telkom runs, called ASSIA, changed your DSL sync profile. ASSIA 'thinks it will give you a better and more stable internet link'. Search for ASSIA on this forum if you want to know more about it.

Your copper distance to the exchange will NOT have an effect on your latency (technically it does, because, you know, signal propagation takes time over any medium, but its so small eg 5km takes like 0.15ms one way). Line sync stability can have an effect on latency, but given the traceroute/ping stats you've provided, It doesn't look like you have line issues.

Is 40ms acceptable? It depends. If you're not a 'gamer' playing online games, then its fine. If you are a gamer, then 40ms (to the first hop), is not really that great.

You can thank Telkom and their wonderful ASSIA system for all of this.
 
Johnatan56 said:
That's quite high, would you please give your line stats as well?
Also looking for something along the lines of interleave depth if you're able to find it under the stats page.


It depends on your distance to the exchange and modulation type, my average is about 22ms at 3km, you're probably at <1.5km and therefore get 10ms. VDSL would also decrease it.

Interleave versus Fast Path.
Interleave is to help with line stability, it syncs a little bit higher (usually about 20%), and does error correction on all packages. This adds 15-20ms delay between the exchange and your house.
Fast path just lets the packets through without inspection for errors, this will have the lowest latency.
Click to expand...

I connected another modem witch gave me these figures, will this help atall?
relative capacity occupation: 100%
noise margin upstream: 24.3 db
output power downstream: 18.5 dbm
attenuation upstream: 25.0 db
carrier load: number of bits per symbol(tone)
tone 0- 31: 00 00 00 02 45 57 77 88 88 88 88 88 77 76 66 43
tone 32- 63: 00 04 15 56 74 89 89 aa aa aa aa bb bb 9a 99 ba
tone 64- 95: 9a bb bb a0 bb aa 9a a9 a9 89 aa aa 98 89 a9 9a
tone 96-127: aa aa a9 99 a9 9a a7 98 98 59 98 99 89 89 98 98
tone 128-159: 97 88 64 05 68 88 88 76 46 87 57 55 00 26 65 53
tone 160-191: 56 77 77 77 62 65 66 77 77 77 76 44 76 77 67 77
tone 192-223: 77 74 47 77 76 04 04 21 46 41 56 66 62 42 43 57
tone 224-255: 63 64 56 66 66 56 66 66 66 14 35 44 50 00 43 00
relative capacity occupation: 100%
noise margin downstream: 17.9 db
output power upstream: 11.3 dbm
 
A fuller version.
[ SAR Counters ]
inPkts = 0x0000c767, inDiscards = 0x00000000
inF4Pkts = 0x00000000, inF5Pkts = 0x00000000
inDMATaskEnd = 0x00000000, inBufErr = 0x00000000
inCrcErr = 0x00000000
inBufOverflow = 0x00000000, inBufMaxLenErr = 0x00000000
inBufLenErr = 0x00000000, inBufDescrOV = 0x0000001e
outPkts = 0x00009293, outDiscards = 0x0000036e
outF4Pkts = 0x00000000, outF5Pkts = 0x00000001
softRstCnt = 0x00000000
inCrc10Err = 0x00000000
inMngBufOV = 0x00000000, inCcBufOV = 0x00000000
inMngBufDescrOV= 0x00000000, inCcBufDescrOV = 0x00000000
inMpoaErr = 0x00000000, inVlanHit = 0x00000000
inCcUDoneErr = 0x00000000, inCcUBDURErr = 0x00000000
outAckDiscards = 0x00000000
relative capacity occupation: 100%
noise margin upstream: 24.3 db
output power downstream: 18.6 dbm
attenuation upstream: 25.0 db
carrier load: number of bits per symbol(tone)
tone 0- 31: 00 00 00 02 45 57 77 88 88 88 88 88 77 76 66 43
tone 32- 63: 00 03 15 56 56 89 8a aa aa 9a bb ab ba ab aa bb
tone 64- 95: 9a bb ab a0 ba a9 99 aa a8 99 99 98 9a 9a a9 aa
tone 96-127: aa aa a9 99 a9 aa 8a 89 99 69 89 99 88 99 98 99
tone 128-159: 88 87 64 04 77 88 88 86 37 88 67 34 02 36 76 64
tone 160-191: 66 77 77 76 62 63 57 76 76 76 76 77 76 67 47 77
tone 192-223: 77 75 25 76 75 64 14 30 46 40 66 56 61 53 31 66
tone 224-255: 54 65 44 56 65 56 66 55 65 25 31 35 50 01 44 00
relative capacity occupation: 100%
noise margin downstream: 18.1 db
output power upstream: 11.3 dbm
attenuation downstream: 44.6 db
carrier load: number of bits per symbol(tone)
tone 0- 31: 00 00 00 02 45 57 77 88 88 88 88 88 77 76 66 43
tone 32- 63: 00 03 15 56 56 89 8a aa aa 9a bb ab ba ab aa bb
tone 64- 95: 9a bb ab a0 ba a9 99 aa a8 99 99 98 9a 9a a9 aa
tone 96-127: aa aa a9 99 a9 aa 8a 89 99 69 89 99 88 99 98 99
tone 128-159: 88 87 64 04 77 88 88 86 37 88 67 34 02 36 76 64
tone 160-191: 66 77 77 76 62 63 57 76 76 76 76 77 76 67 47 77
tone 192-223: 77 75 25 76 75 64 14 30 46 40 66 56 61 53 31 66
tone 224-255: 54 65 44 56 65 56 66 55 65 25 31 35 50 01 44 00
tone 256-287: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 288-319: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 320-351: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 352-383: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 384-415: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 416-447: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 448-479: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
tone 480-511: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
Mr.Jax said:
@OP

As a few others have already said, your latency has increased because your DSL sync is now on interleave path (as opposed to FastPath). This is because a system that Telkom runs, called ASSIA, changed your DSL sync profile. ASSIA 'thinks it will give you a better and more stable internet link'. Search for ASSIA on this forum if you want to know more about it.

Your copper distance to the exchange will NOT have an effect on your latency (technically it does, because, you know, signal propagation takes time over any medium, but its so small eg 5km takes like 0.15ms one way). Line sync stability can have an effect on latency, but given the traceroute/ping stats you've provided, It doesn't look like you have line issues.

Is 40ms acceptable? It depends. If you're not a 'gamer' playing online games, then its fine. If you are a gamer, then 40ms (to the first hop), is not really that great.

You can thank Telkom and their wonderful ASSIA system for all of this.
Click to expand...

Yes, but latency increase due to the DSLAM or other switches that are used when you are at a distance. It's easier to run a cable to a switch 2km away and then to the client's house than to run a copper line all the way there.

@jphegers, I am sorry but I don't know how to read those stats, maybe Mr.Jax knows?
You are on Afrihost according to the tracert, would you mind messaging Afriman/genie or any one of those or post in this thread for assistance regarding your line? http://mybroadband.co.za/vb/showthread.php/819352-Afrihost-New-Network-Feedback-Part-2/page580

Your line stats are good though, so you shouldn't have to be on interleaved if you're a gamer. Otherwise just leave it.
 
@jphegers

That is a rather old modem/ADSL router. My guess one of the original Billion Modem/routers. Could you provide us with the make and model number?

in don't know how that modem router will react to being faced with an interleaved signal, if I am right.
 
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