Line quality - Post yours

Praetorian

............. Downstream Upstream
SNR Margin: 25.78 _____ 28. 0 dB
Line Attenuation: 29.75_____ 19. 0 dB

SNR - Higher numbers are better than lower numbers.
Line Attenuation - Lower numbers are better than higher numbers.

Noise Margin (AKA Signal to Noise Margin or Signal to Noise Ratio)
Relative strength of the DSL signal to Noise ratio. The higher the number the better for this measurement. In some instances interleaving can help raise the noise margin to an acceptable level.

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 little or no synch problems* (but see note below)
20dB-28dB is excellent
29dB or above is outstanding

* Note that there may be short term bursts of noise that may drop the margin, but due to the sampling time of the management utility in your modem, will not show up in the figures.

Line Attenuation
Measure of how much the signal has degraded between the DSLAM and the modem. This is largely a function of the distance from the exchange. 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

Karoma

If you want an any way decent comparison, you should state measurement practices..

Shamo

......................... Download Upload
Line Attenuation__ 18 db || 5.5 db
Noise Margin_____ 21 db || 28 db

TimTim

ADSL Link Downstream Upstream
Connection Speed 2048 kbps 128 kbps
Line Attenuation 43 db 14 db
Noise Margin 12 db 29 db

kaizersoze

Karoma wrote:

If you want an any way decent comparison, you should state measurement practices..

How do you mean measurement practices? These are just readings taken from the modem.
Mine are:
Downstream Upstream
Max Allowed Speed (kbps) 2048 128
SN Margin (dB) 31.00 13.50
Line Attenuation (dB) 35.00 21.00
I found an interesting formula on a DSL website for calculating line length from the exchange.
Downstream attenuation / 13.18 = line length (Km)
Don't know how "official" it is but in my case it's fairly accurate.
I know there are several other factors that can affect line attenuation.

MarkR

SN Margin (dB) 23.00 6.50
Line Attenuation (dB) 53.00 31.50

peterk19

Heres mine seems to be really bad but ive never had any trouble with it

DSL Statistics

Downstream Upstream
Max Allowed Speed (kbps) 2048 128
SN Margin (dB) 17.00 12.00
Line Attenuation (dB) 52.50 30.50

Pete

dazberry

ADSL Link Speed 2048kbps/128 kbps
SNR 5.5db/ -
ATEN 55db/31db
Loop Distance: About 11k ft.

/Edit: Mine looks worse (AFAIK) than yours peterk19, but I've had this since August 2003 and never had any problems either - beyond exchange problems or upgrades????

D.

Creamy Goodness

Downstream Line Attenuation:........27
Upstream Line Attenuation:............13

Downstream Margin:......................13 db
Upstream Margin:..........................31 db

EsatBT BB+

Kensington

Downstream Speed: 2363000 kbps
Upstream Speed: 156600 kbps
Mode: G.Dmt.BisPlus (ADSL2+)

Local SNR: 12.5dB
Local Attenuation: 59.5dB
Remote Attenuation: 31.0dB
Remote SNR: 0dB

Yakuza

DSL Statistics
Downstream Upstream
Max Allowed Speed (kbps) 2048 128
SN Margin (dB) 22.65 27.00
Line Attenuation (dB) 24.82 17.00

byte

	                                Downstream 	          Upstream
Max Allowed Speed (kbps) 	    2048 	                   128
SN Margin (dB) 	                    30.00 	                 12.50
Line Attenuation (dB) 	           48.50 	                 31.00

It always seems to work OK.

SickBoy

                                      Downstream 	Upstream
Max Allowed Speed (kbps)                1024 	         128
SN Margin (dB) 	                        17.00 	         12.50
Line Attenuation (dB)                   36.00 	         23.00
CRC Errors 	                        1424             0

Eircom...

h0stn0tf0und

UTV

Max Allowed Speed (kbps) 1024 128
SN Margin (dB) 33.22 28.00
Line Attenuation (dB) 10.35 10.00
CRC Errors 0 0

kaizersoze

h0stn0tf0und wrote:

UTV

Max Allowed Speed (kbps) 1024 128
SN Margin (dB) 33.22 28.00
Line Attenuation (dB) 10.35 10.00
CRC Errors 0 0

Those are excellent figures You must be close to the exchange??

tomk

IPCop DSL Status for UTV:

Modem State : SHOWTIME_L0
Remote Report : Showtime
Last Failure :
Time Connected : 01:30:23
Modulation : G.dmt
Rate Us/Ds (Kbps) : 128 2048
Cap. Occupation Us/Ds (%) : 18 48
Noise Margin Us/Ds (dB) : 25 14
Attenuation Us/Ds (dB) : 26 48
Output Power Us/Ds (dBm) : 0 13
FEC Errors Us/Ds : 0 0
CRC Errors Us/Ds : 258 0
HEC Errors Us/Ds : 103 3
Driver Version : 0.9.0
Firmware Version : PCI-AML-1-0.4-0.1.0.10
ADSL: status ATM ready, modem state SHOWTIME L0, US rate 127Kbits/s, DS rate 2047Kbits/s
Current speed: US 66Kbits/s,DS 2047Kbits/s
Bridged: 00:2d:1d:83:e6:f1
AAL5: tx 2889787 ( 0 err ), rx 3899469 ( 463 err, 0 drop )
AAL0: tx 0 ( 0 err ), rx 0 ( 0 err, 0 drop )

I wouldn't be sure how any of this relates to anyone else's figures, but I'm not particularly concerned either - it's completely stable and reliable.

jonski

Downstream Upstream
Max Allowed Speed (kbps) 1024 128
SN Margin (dB) 31.00 14.50
Line Attenuation (dB) 32.00 18.00
CRC Errors 0 0

parasite

......................... Download Upload
Line Attenuation__ 29 db || 21 db
Noise Margin______ 33 db || 28db

WizZard

Mine looks good actually. I generally get very decent speeds. Looking forward to upgrades though.

OfflerCrocGod

My line shouldn't work, but it does, I'm worried about the upgrades

ADSL Link Speed 2048 kbps 128 kbps
SNR 6.5 dB 0.0 dB
ATEN 52 dB 31 dB

MisterAnarchy

Not meaning to sound stupid but how does one measure these Line Quality values ?

jimmeh

Not looking too good on my line, explains the random desyncs.

Line Status ADSL Link Speed 2048 kbps 128 kbps
SNR 6.5 dB -
ATEN 44 dB 25 dB

shinzon

Downstream Upstream
Max Allowed Speed (kbps) 1024 128
SN Margin (dB) 31.00 11.50
Line Attenuation (dB) 43.50 25.00
CRC Errors 7 0


hmmz now you see why im worried about these upgrades lol

shin

kaizersoze

MisterAnarchy wrote:

Not meaning to sound stupid but how does one measure these Line Quality values ?

They are readings taken from the BB router/modem.
What modem have you?
If it's the Netopia wireless router click this link to access the stats page:
http://192.168.1.254/indexTroubleshootStatRES.htm?adslRES.htm.
If it's another type just access the router config page and look for "DSL statistics".

Tweaky

ADSL Link Downstream Upstream
Connection Speed 2048 kbps 128 kbps
Line Attenuation 10 db 7 db
Noise Margin 31 db 31 db

BT BB+

bishopLEN

Eircom

Max Allowed Speed (kbps) 2048 128
SN Margin (dB) 31.00 13.00
Line Attenuation (dB) 20.00 11.00

aob

Eircom

SNR Margin: 35.82 28.00 dB
Line Attenuation: 12.67 11.00 dB
Max allowed Data Rate: 1024 128

No idea if those numbers are good, but I've been expierencing terrible lag and DC's in games, and alot of sites either load extremely slow or tend not to load the first view times until they're refreshed.

HSo

Eircom

Downstream Upstream
Max Allowed Speed (kbps) 2048 128
SN Margin (dB) 23.17 26.00
Line Attenuation (dB) 32.49 18.00

HSo

aob wrote:

Eircom

SNR Margin: 35.82 28.00 dB
Line Attenuation: 12.67 11.00 dB
Max allowed Data Rate: 1024 128

No idea if those numbers are good, but I've been expierencing terrible lag and DC's in games, and alot of sites either load extremely slow or tend not to load the first view times until they're refreshed.

I've notice that this weekend and the previous were terrible for BB with Eircom. Especially from Friday evening to midday on Saturday. It was like dialup. Their DNS servers were not responding during that time. From about 2pm on Saturday things picked up again. Normaly for me speeds are great.

Dr Bolouswki

Eircom support say "you must have a virus" - my OS install is 2 weeks old and there are 5 sys tray programs installed (including anti-virus)... pfff

Max Allowed Speed (kbps) 2048 128
SN Margin (dB) 19.00 11.00
Line Attenuation (dB) 50.00 30.00
CRC Errors 93 0

HSo

Dr Bolouswki wrote:

Eircom support say "you must have a virus" - my OS install is 2 weeks old and there are 5 sys tray programs installed (including anti-virus)... pfff

Max Allowed Speed (kbps) 2048 128
SN Margin (dB) 19.00 11.00
Line Attenuation (dB) 50.00 30.00
CRC Errors 93 0

Yeah! I got the same Sh*te from Eircom about the virus. Perhaps I'm unlucky with the person I get on the phone as other people got some good help in resetting their DNS to alternative settings.

h0stn0tf0und

@kaizersoze

I'm about .75-1 K from Exchange.

**Timbuk2**

Eircom

  	                             Downstream   Upstream
Max Allowed Speed (kbps) 	1024 	      128
SN Margin (dB) 	                     31.00 	 7.00
Line Attenuation (dB) 	            22.50      13.00
CRC Errors 	                         386 	       0

Dr Bolouswki

QUOTE=PhoenixRising]Ok just off the phone with eircom support. The guy I was talking to said there are no reported faults anywhere.

He got me to change my DNS settings however and it's much better now. Here's what he got me to do:

Go to your broadband connection in Network Connections. Right click on it and click properties. Select Internet Protocol (TCP/IP) and click properties. Select the last option 'Use the following DNS server addresses'. Enter:

Preferred: 159.134.237.6
Alternate: 159.134.248.17

Click OK and Close. That should do it. Mine is a lot better now.

Edit: Oh and he also got me to do a DNS flush. Start->Run - type cmd, press enter. Type ipconfig /flushdns, press enter.[/QUOTE]

Calibos

ADSL Link Downstream Upstream
Connection Speed 2048 kbps 128 kbps
Line Attenuation 38 db 12.5 db
Noise Margin 13 db 24 db

kaizersoze

h0stn0tf0und wrote:

@kaizersoze

I'm about .75-1 K from Exchange.

Thought that.:)

rogue-entity

Connection: BT DSL

noise margin downstream: 45 db
attenuation downstream: 20 db

noise margin upstream: 26 db 
attenuation upstream: 12 db

I live just up the road from the exchange, about 500-750 meters.

Willymuncher

BT

Downstream
noise margin downstream: 44.5 db
attenuation downstream: 15.5 db

Upstream
noise margin upstream: 29.0 db
attenuation upstream: 13.0 db

Clover

max allowed speed 2048 128

sn margin ( dB) 30.00 11.50

line attenuation (dB) 47.00 29.00

crc errors 11 0

Peace

Ericom...

Downstream Upstream

---

---

SNR Margin: 26.50 28.00 dB
Line Attenuation: 27.64 17.00 dB
Output Power: 19.51 11.97 dB
Errored Seconds: 0 0
Loss of Signal: 0 0
Loss of Frame: 0 0
CRC Errors: 85 0
Data Rate: 2048 128

Peanut

Eircom Business Enhanced

Approx 2 weeks ago -

Operational data report : near end (Downstream)

---

Attainable Atm rate : 6368 kbit/sec
Interleaved used Atm rate : 4096 kbits/sec
Noise Margin : 12 dB
Line attenuation : 45 dB
Output Power : 15 dBm


Today, (after scheduled exchange maintenance last night) -

Operational data report : near end (Downstream)

---

Attainable Atm rate : 5280 kbit/sec
Interleaved used Atm rate : 4096 kbits/sec
Noise Margin : 9 dB
Line attenuation : 44 dB
Output Power : 19 dBm

Nothing changed at this end afaik.