What do the numbers in my modem statistics mean and are my stats good?
A: Most modems and routers have the ability to monitor line statistics. Some modems have very detailed monitoring while others may only show basic information.

Although what is monitored and the exact name may be different depending on manufacturer, the overall information is the same. Below are some of the common terms and measurements used to judge line quality. Remember these are not hard numbers but simply a generalization of line statistics:

Attainable Line Rate (AKA Synch Rate)
This is the maximum rate at which your modem can connect to the DSLAM if there was no service provisioning limiting the bandwidth. Anything over 2,000Kbps is considered good. The higher the number the better.

Used Line Rate
Your Used ATM Rate (actual service rate) plus bandwidth to cover the overhead and provisioning of the service.

DSL Rate
Your provisioned ATM Rate (actual service rate) plus bandwidth to cover the overhead and provisioning of the service.

Relative Capacity (AKA Line Capacity)
Percentage of your overall available bandwidth used to obtain your service ATM rate. For example; if your max line synch rate was 5888Kbps and you were provisioned on a 1472Kbps service you would be using 25% capacity. 1472/5888=25% capacity. The lower the relative capacity the better, but you can still get maximum speeds (although a less stable connection) even with a very high relative capacity. In other words you could be synching at 1472Kbps with 98% relative capacity and achieve maximum speeds, but you may experience more disconnects.

SN Margin (AKA Signal to Noise Margin or Signal to Noise Ratio)
Relative strength of the DSL signal to Noise ratio. 6dB is the lowest dB manufactures specify for modem to be able to synch. In some instances interleaving* can help raise the noise margin to an acceptable level. The higher the number the better for this measurement.
> 6dB or below is bad and will experience no synch or intermittent synch problems
> 7dB-10dB is fair but does not leave much room for variances in conditions
> 11dB-20dB is good with no synch problems
> 20dB-28dB is excellent
> 29dB or above is outstanding

Line Attenuation
Measure of how much the signal has degraded between the DSLAM and the modem. Maximum signal loss recommendation is usually about 60dB. The lower the dB the better for this measurement.
> 20dB and below is outstanding
> 20dB-30dB is excellent
> 30dB-40dB is very good
> 40dB-50dB is good
> 50dB-60dB is poor and may experience connectivity issues
> 60dB or above is bad and will experience connectivity issues

Output or TX Power
How much power modem (upstream) or DSLAM (downstream) is using. Maximum recommended is about 15dB. The lower the power the better for this measurement.

CRC Errors (Cyclic Redundancy Check)
CRC is a method of detecting errors in data transmission. A high CRC count in inself is not really cause for alarm. However, any increase in CRCs after your initial connection is established is a problem and usually points to a physical issue somewhere.

* Interleaving
Interleaving is an error correction protocol that is implemented for your line at the DSLAM. With Interleaving enabled, the DSLAM can correct errors in the data stream it receives before passing that data to your gateway router. It is usually implemented on noisy or marginal lines and can greatly increase sync stability and effectively eliminate "first hop" packet loss. The largest drawback to Interleaving is that it will significantly increase your ping time, specifically to your first hop gateway router.

If Interleaving is not enabled on your line, it is configured as FastPath. FastPath allows the DSLAM to pass the data received from you to the first hop router without performing any error correction. As a result, marginal lines could experience an increase in packet loss and decrease in sync stability (i.e. frequent sync loss). However, FastPath does produce decreased ping times, especially to the first hop router.

Credits : amadeo


Pinned and updated !

This post has been edited by unstoppable: Sep 2 2006, 06:06 PM

20+dB to 6dB??? With 6dB, I doubt you can even surf properly. Where do you live? And did you add anything to your network such as splitters/microfilter etc?

Addition: You better call up streamyx.

This post has been edited by mengsuan: Nov 26 2005, 02:02 AM

i don't think the upgrading process is lowering your SNR margin. it may be due to other causes such as DSLAM error at the exchange, phone line got struck by lightning, line card error (at exchange), port error, phone line quality drop and the list goes on and on...

mine is now 11dB :|

OMG... why is it so low? You will keep disconnecting.

It has to be because they are doing something at the dslam. I cannot download at all now also btw.

How many days have the connection been so poor and can you roughly tell me where you live?

It has been bad for around the same time as everyone else (packet loss, connection timeouts, etc), but today it is worse than ever. I hope when i wake up tomorrow, it will be better. Heh

Staying near the KL area. Not gonna go into detail, sorry.

11dB and above is quite okay.. infact, 11dB is the minimum optimum SNR margin for modem sync and speed.. the frequent dc must be due to DSLAM error or line error..

I must consider myself lucky to have 31dB SNR margin. Never disconnected before but still the speed to certain websites is slow.

is mine ok???

Near End Noise Margin (dB) 375
Near End Attenuation (dB) 285

Far End Noise Margin (dB) 210
Far End Attenuation (dB) 155

mine is now 10dB...
no dc

i dint change anything & its suddenly drop to 6dB, when i call streamyx i heard that system says got upgrade include kelana jaya area so i leave it 1st loh, my location is ss2

Mine started to drop to 8~11dB 2 weeks back, previously was around 15~20dB. I also dunno what made that happen but i don't face disconnections.

Well, its morning now. The connection is still bad (low SNR + higher than normal attenuation) , BUT the download speed is better.

i call streamyx..they ask me to disable my modem auto connect only they can open a report..i was like wtf..what should i do?

how 2 check my snr margin?????
can any1 tell how to check???? thx

wud modem u r using?
acess ur modem and see the status page..

what is SNR Margin ?? the strg of the signal ??

This post has been edited by ForCe: Nov 27 2005, 01:22 AM

For SNR Margin and other modem status readings, pls refer to http://forum.lowyat.net/index.php?showtopi...dpost&p=4561212

if i bring a printing of my modem SNR margin to any streamyx service center will it help? coz i scare they give all crap like is your own phone line problem or whatever

i am using aztech 600eu router ,dunno how 2 check my snr margin. can any1 help me ??? thx

All the sudden people are facing this problem?

can someone answer my question pls? tq

Login to http://192.168.1.1. Click the word 'Status', followed by 'Modem Status'. US Margin and DS Margin are your upstream SN Margin and downstream SN Margin respectively. Hope this helps.

thx alot
my us margin = 22
ds margin = 31
is tat good???

If that's the SNR value, anything above 11db is good

Edited* Typo


This post has been edited by Richard: Dec 28 2005, 10:43 PM

That's good.

Err... I think you have typed something wrongly. It is supposed to be "anything above 11dB is good". Not below.

unstoppable , you have alot of attenuation on your line...is it connected to a phone, and if so, is it noisy ?

i using a spliter mah..is that affected?

Oh splitter, generally it does not affect. But this is my experience. I bought a RM 10 "made in China" splitter. I used it and straight away the SNR drop until become unstable. Then I opened up that splitter and analysed the circuit. Then I found that they have connected the modem to phone and vice versa. So, the modem port becomed filtered. Then I swithed the cables and tata... Not a single dB is affected.

Lesson: Don't trust the label and try switching around.

ok..but before that its ok all the way..called streamyx today and get a report number already

Let us know how it is. Yesterday mine was 14 for both upstream and downstream. Today its 31(down) and 14(up). Both ok i think.

mine still lousy..still thinking wanna ask technician come my house or not..

My connection...

Link Status Connected
Us Rate (Kbps) 384
Ds Rate (Kbps) 352
US Margin 10
DS Margin 6
Modulation MMODE
LOS Errors 0
DS Line Attenuation 63
US Line Attenuation 63
Path Mode Fast Path

As you can see.. my connection is very bad.. the download speed can go up and down from 1024 to 352.. So, I can't really ask the technician to come to my house by saying that my line is slow coz most of the time it can go up to 512,702,900 (I'm on 512 package).. however, my concern here is about the Margin and Line Attenuation.. is it possible to ask them to increase these values to a better rate ? BTW, I'm 5.48 KM from the DSLAM. Do I have to lodge a report ? Can't I just go directly to Clickers or TMNut's office ?

my case, i thought that was line telephone problem mayb old copper or something else but after report to TM their technician came and just replaced if im not mistaken they said DSLAM or wuteva. Now, got good n stable connection

In my opinion, the problem here is with your phone line.

This morning connection...

Link Status Connected
Us Rate (Kbps) 384
Ds Rate (Kbps) 800
US Margin 16
DS Margin 7
Modulation MMODE
LOS Errors 0
DS Line Attenuation 63
US Line Attenuation 63
Path Mode Fast Path

You see.. the speed can change but not the margin, I get a fewer disconnections during the day, but in the night, duh.. lots of time. If the problem is my phone line.. can it be repaired ?

b4 this...me oso keep on facing dc problem plus when pick up phone the dsl sure dc~...then i complaint to clickerz..then after 2nd day..they send tmnut guy come over and trouble shoot...

then they found out is the switch at the exchange there broken edi..so they replace a new 1~..now my snr margin reading is like:

SNR:-
DS: 43.9
US: 25
Line Attenuation:-
DS: 1.1
US: 4.0

i think ushd direct go clickerz and ask them to send some technician over ur hse to troubleshoot the line

Us Rate (Kbps) 256
Ds Rate (Kbps) 512
US Margin 27
DS Margin 22
Modulation MMODE
LOS Errors 0
DS Line Attenuation 57
US Line Attenuation 63
Path Mode Interleaved



How about mine?

ur line attn vr high oso~..think will always dc,rite?

how about mine?

Us Rate (Kbps) 256
Ds Rate (Kbps) 512
US Margin 28
DS Margin 6
Modulation MMODE
LOS Errors 0
DS Line Attenuation 62
US Line Attenuation 62
Path Mode Interleaved


and are the units for DS and US in decibels?

This post has been edited by europology: Dec 11 2005, 05:12 PM

and oso, does ur connections auto-connect once u start ur pc? mine auto-connect after i've authenticated my modem lol...

mine connection auto connect once i on the modem..cos mine 1 is router+modem~...so the connect 1 oledi build in~

Yeah. the SNR Margin is quite low lately, I think since last week. Mine currently around 8.5, been disconnected every hour.

Last time was around 20+, can last few days without dc.

if they send technician come change telephone wire no need money one rite?

Modem Status

Link Status Connected
Us Rate (Kbps) 384
Ds Rate (Kbps) 1024
US Margin 4
DS Margin 21
Modulation MMODE
LOS Errors 0
DS Line Attenuation 20
US Line Attenuation 10
Path Mode Interleaved

Yes, definetly do this. Also, make sure you tell them that there is alot of attenuation on your line, and you get disconnected alot.

Will do that tomorrow.. thanks

someone help me for Line Attenuation which one is good?

DS 15 US 8

OR

DS 15 US 0

http://forum.lowyat.net/index.php?showtopi...dpost&p=4561212

lol, in my office the SNR margin is around 5.5 to 5.7....Line Attenuation: 60 to 63.9 ...but thank god it is still ok, not that it disconnect every time...just once in 2 or 3 weeks........

Modem Status

Link Status Connected
Us Rate (Kbps) 384
Ds Rate (Kbps) 2048
US Margin 11
DS Margin 31
Modulation MMODE
LOS Errors 0
DS Line Attenuation 32
US Line Attenuation 36
Path Mode Interleaved

Ignore the 2048, it's 1024 anyway. I'm about 3km from the DSLAM and my area is actually a kampung. So i guess that's why the signal is pretty good.

Which technician u call?the streamyx 1300 or the telekom 100 ones?

I called 1300 they refer me to 100, called 100 told my problem, they say okok. They didn't said they will open a report or make appointment to troubleshoot the line..

So am i missing something? Shouldn't they make appointment with me to check my phone line problem?

go to tmpoint(i go to kelana jaya 1) then tell them ur line problem..they will make the appointment for u with tmnut technician~..then they will print 1 receipt for u to keep for reference...then just wait them to call u~

Should i called tmnet streamyx technician if i always having SRN value less than 15?

SRN ? or is it SNR

dplaya03 , Please post your details (I meant your modem details). So at least someone could check it out for you. Do you face a lot of disconnections ?

--- ADSL Line Status
Status : OPERATIONAL (1)
SnrMgn (dB) : 7
Attenuation (dB) : 58
PSDM (-dBm) : 38
ALARMS : No Defect
ADSL Framing Mode : 3
DS TxRate (kbps) :1856 US TxRate (kbps) : 608
CrcBlockLength : 59 CrcBlockLength : 20
Symbol/Codeword : 1 Symbol/Codeword : 1
CheckBytes : 0 CheckBytes : 0
Intl Delay (ms) : 0 Intl Delay (ms) : 0
ES Count : 799
ReceivedBlks : 7324005
TransmittedBlks : 7324005
CorrectedBlks : 0
UncorrectedBlks : 140829

My SNR is pretty low, 6dB. Last time I used to get 23dB, so I'm not sure what happened... Regardless of what my DS/US TxRate is, I never get anything above 60KiB/s down and 25KiB/s up.

But I have been facing lots and lots of disconnections the past few days...

Anyone know what the PSDM, CrcBlockLength, Symbol/Codeword, Checkbytes etc etc mean?

Sorry.. wrong typo.. its SNR

Here is the status that i got from my router Dlink DSL 504T
SNR Margin 11 26 dB
Line Attenuation 51 59 dB
Data Rate 1024 384 kbps

wow , your downlink semes to be really bad. Your line is really bad..Seriously , uplink and downlink..lots of noise , better contact TM

for me, before this my SNR margin was around 28-30db with the line speed of 512kbps/256kbps till recently when they upgrade my line speed to 3072/896 and reducing my SNR margin to 13db, so its obviously not the problem at my house line right? problem at DSLAM?

I have to call more than 4 times just to get them to open a report. I have told them that my SNR margin is too low and line attenuation is too high, it seems like they don't understand what it is. Just keep on asking me to troubleshot this and that.

I was wondering too. If call TM to report about low SNR margin, what to tell them huh ?

Hi,

Would like to know whether the low SNR margin is caused by the poor line quality and thus lead to frequent line drops? So far only one or two helpdesk assistants understood what I meant by low SNR margin. however, the quality has not been improved despite numerous reports made.

Do I need to call the technician from TMNet technician to come over to check the line and bypass the Streamyx call centre? And would it be any problem relevant to my modem? THere is no problem at all when i use my old USB modem but when using the ethernet modem, the line drops frequently and the d/l speed is very poor.

thank you.

The quality of the phone line is also a factor for the SNR margin. Maybe you can call TM (100) and ask them to change your phone line.

I'm wondering whether this drop of SNR is causing more disconnection problems... I have kept a log of my streamyx connections since last july, and here is a graph of the connection status since october... and you can see the large amount of disconnections... Is that when they started uncapping the lines and the SNR decreased?

How do i check ADSL line status? My connection also very damn slow already... Dunno why it damn slow?

i am facing frequent dc also ...
evey hour dc at least 1 time............

here is my SNR for normal condition
Downstream Upstream
SNR Margin 15.7 23.0 dB
Line Attenuation 49.9 29.5 dB
Errored Seconds 825 3
Loss of Signal 9 9
Loss of Frame 0 0
CRC Errors 1 0
Data Rate 1024 384 kbps
Latency FAST FAST

why the US SNR is higher than DS SNR ??

My upload SNR is also higher than download SNR. Your SNR seems fine. Can't say excellent but satisfactory.

yaya .. because at that time my connection still fine..
i will post the SNR margin when it make me mad~~

had been suffering for two months already, at last i get my telephone line today in new house, i was so happy for the SNR take a look on picture below, at last i get a stable connection, but i register got 1mb package and i getting 512 only will make a report soon.


Attached thumbnail(s)

Hey, you really got a good line. ~Cheers~

i got this snr margin suddently when checking thru my router,

what you think,

maybe i was connected to fiber optic, have to go to back of my house and see, hahahahahah

telekom telekom, joker lar you guys.


Attached thumbnail(s)

Or your modem koyak ?

What the heck??? What is that SNR margin? And btw, your attenuation is quite high.

I am connected to streamyx throught fiber optic but I never see such thing happening to my connection.

And I was laughing by myself at the computer when I read this. I wonder if someone thought that I lost my mind.

This post has been edited by mengsuan: Feb 10 2006, 02:27 PM

How about SNR Never over 6-7dB ? I can online in the morning (quite stable). but at night ,the SNR drop to 0 every few minutes ( mean dc every few minutes).

Morning can online, after 7pm cannot. The SNR Up and down so frequent.

Ask TM to come down and check your physical phones lines.

To all Aztech modem user:
Is there a way 2 check this - Attainable Line Rate (AKA Synch Rate)??
I'm able to check SNR MArgin & Line Attenuation only.

Hi all, how do I check my setup for ZTE ZXDSL 831 modem?

Thanks in advance

aztech i think cannot

I managed to get to my modem settings for ZTE ZXDSL 831.

Could someone check my statistics and see if they're ok?

Local Line Atten. - 47.5dB
Remote Line Atten. - 30.0dB
Local SNR Margin - 21.0dB
Remote SNR Margin - 9.0dB

Thanks

Your line attenuation is quite high.

Besides that, does everything seem fine?

I'm always getting disconnected, and I'm wondering if there's anything I can do to get a more stable connection.

Thanks.

Mine is pretty bad, right?

Link Status Connected
Us Rate (Kbps) 672
Ds Rate (Kbps) 256
US Margin 6
DS Margin 4
Modulation MMODE
LOS Errors 3
DS Line Attenuation 47
US Line Attenuation 53
Path Mode Interleaved


256KB ???

Yes. The SNR margin is very very low..

You'll always get disconnected because your line attenuation is high. Try checking your connection. If the attenuation is still high, call streamyx or telekom to change a new line for you.

click WAN..then below u will see DSL param in box...click that box..
cann apply to cheapo kasda modem 2..

This post has been edited by aBs-: Feb 19 2006, 04:01 PM

Will Telekom do that for us? What if I'm living in a condo?

Condo ah? That one I'm not sure... If it is normal terrace house, then telekom will do it. Try asking other forumer and see. I don't live in a condo, that's why I do not know about this...

from snapshot above, i wanna ask some question

1. before this, Downstream Margin was 22 db and Upstream Margin was 26 db

2. now, the Downstream/Upstream Margin is like what you all see but! in 1 or 2 hours, the Downstream Margin can be like crazy number such as 20910923 db (when i post this reply, the Downstream Margin became 0 db Upstream Margin stay 14 db )

its happened since last week when the Downstream/Upstream Speed advertise become crazy.

what should i do eh? hope someone can explain/help me

thanks in advanced

** EDITED **



i tot changing to my blacksheep modem will solve my prob. but its getting worst...

should i make a report? what to say eh?

Thanks in advanced again

This post has been edited by ahlong: Feb 22 2006, 06:29 PM

errr... raed through 5 pages in this thread... but still can't quite understand on how to determine whether my Streamyx SNR margin is good or not..

Margin value the higher the better or the lower better??
Attenuation value the higher the better or the lower better??

This post has been edited by RyonanGT: Feb 22 2006, 06:53 PM

hmm... go to http://192.168.1.1

username shud be ADSL when password is expert03
(CAPS IS IMPORTANT)

then under WAN tab... press DSL Param... there u get it...

===========================

How's my connection??? bad eh??
DSL Parameters and Status
Vendor ID: 00B5GSPN
Revision Number: Y1.16.3
Serial Number: 123456789abcdx
Local Tx Power: 11.55 dB
Remote Tx Power: 12.35 dB
Local Line Atten.: 57.0 dB
Remote Line Atten.: 31.0 dB
Local SNR Margin: 6.5 dB
Remote SNR Margin: 29.0 dB
Self Test: Passed
DSL Standard: G.dmt
Trellis Coding: Enable
Framing Structure: Framing-3
Config Data Up Down
Intrlvd Fast Intrlvd Fast
AS0(kbps): - - 64 0
AS1(kbps): - - 0 0
LS0(kbps): 256 0 - -
LS1(kbps): 0 0 - -
RValue: 8 0 16 0
SValue: 8 16
DValue: 2 1

Margin value should be high. Attenuation should be as low as possible. According to the quote, the connection is good.

icic..
thx for the clarification...