Thread: SNR Margin and Line Attenuation - What do they mean?

Toolman,

u can log-in the router config. page by typing 192.168.1.1 in internet explorer... it will ask for username & password... Type admin in both fields(its by default)... now a new status page will open... scroll down... there u can see things like snr margin & line attenuation..if ur downstream snr is > 20 then its fine... & line attenuation should be < 20... else get ur line chkd...

hope it helps...

Thnk for the response and I did as directed .... this what wht i was looking for and got
my results as seen on my dsl page is as follows
Snr downstream : 26.8 +/- 2 or 3
Snr Up stream : 18.0 fixed

line attenuation :downstream :37.0 fixed
Up stream : 13.5 fixed

whts is upstream and down stream definations pls ?
I guess my attenuation downstream is not so good and i guess its b'coz my line is scratchy ....

regds toolman /~

U can see 1st post of this thread to get answers of ur questions...
btw, unless u r facing any problem in ur internet connection nothing should worry u...

Very informative post!

repped you...

Hey,
my SNR ratio is 12.5 upstream ans 15 downstream. Its on the lower side right??
Attenuation is 15.5 and 8.9. This is supposed to be rally great. Right?

Whats the reason for this i.e good attenuation and bad snr, is it common.
BTW i am getting only about 1.5 mb speed during free time. Is this normal.

Originally Posted by ambush

Hey,
my SNR ratio is 12.5 upstream ans 15 downstream. Its on the lower side right??
Attenuation is 15.5 and 8.9. This is supposed to be rally great. Right?

Whats the reason for this i.e good attenuation and bad snr, is it common.
BTW i am getting only about 1.5 mb speed during free time. Is this normal.

SNR Margin and Line Attenuation are two different things. The Line ATtenuation in your case is low, probably because your line is freshly laid and has little resistance. SNR Margin is not very bad for you but an improvement will not harm. SNR Margin can be on the lower side due to quality of signal at the exchange.

Originally Posted by ambush

Hey,
my SNR ratio is 12.5 upstream ans 15 downstream. Its on the lower side right??
Attenuation is 15.5 and 8.9. This is supposed to be rally great. Right?

Whats the reason for this i.e good attenuation and bad snr, is it common.
BTW i am getting only about 1.5 mb speed during free time. Is this normal.

The attenuation is really low and ideally u should be getting 30+ dB of SNR. Dont know why the modem is displaying 15dB.

Attenuation is dependent upon factors like distance between the modem and the exchange, the amount of cabling being used, the number of nodes and internodes. And both the attenuation and snr are inversely proportional. Low attenuation = high snr and high attenuation = low snr.

Most of the subscribers are getting he speeds which u had mentioned during the night time. Hence there is no need to worry about that.

hey thanks for the great info bout these terms kix...!

repped!

Thanks, starryknight.

hey u dint return the favor :lol:

Hey, I did give you a repo on 19-Feb-2009 @ 5:54 pm. Check your User CP.

aah that was you ...hehe so i returned the favor

More than that - one repo from me earns you 8 points.

accha so thats wht the rep power means .. thx for that kix!

Some posts by surinder1508 and replies to those posts were moved here: http://www.indiabroadband.net/bsnl-b...ull-speed.html (BSNL conection not giving full speed)

Thanks just4kix it was good to about it...can u also state the difference (Vendor ID (Local/Remote):TMMB / BDCM)

//Moderator note: You have not activated your account. Please click on the link in the mail you received from the forum admin in your mailbox. Failure to do so will cause all your posts go into moderation. - just4kix

Thanks just4kix it was good to about it...can u also define Vendor ID (Local/Remote): TMMB / BDCM

>>>

@dlalhosn

can u also define Vendor ID (Local/Remote): TMMB / BDCM

Usually none checks these !
snr attn power line speed check itself
gives some idea about line conditions.

PARA TW0: for more information :

From GOOGLE search :

Vendor ID (Local/Remote): TMMB / BDCM

TMMB in the speedtouch is actually broadcom, its just speedtouch want to be special.
You can get the firmware and the upgrade utility here.
h t t p://xxxxxxxxx/routers/( *redirects to wrong website

5 CPE Vendor ID to Integrated Circuit Manufacturer

5.1 ADSL/ADSL2+

ALCB = Alcatel (now ST Micro)
ANDV = Analog Devices
BDCM = Broadcom
GSPN = Globespan
IFTN = Infineon
STMI = ST Micro
TMMB = Thomson Multimedia Broadband

REF:xDSL KnowledgeBase - www.hardwarezone.com.sg

How do I measure / check my SNR & line attenuation ?
Totally am new to brandband as sombody said i have logged into the moderm but i dont knoe how to get thsi information (i didn't find any text "SNR" or "line attenuation")

My system Config
OS:windowsXP
ModemNA-A211-I

below is the image of my router's login page

h**p:// img136.imageshack.us /img136/8620/ modem.jpg

under Device info/Statistics ADSL

Device Info
Summary
WAN
Statistics
LAN
WAN
ATM
ADSL
Route
ARP
DHCP
......
...............
DSL
Diagnostics
Management

Statistics -- ADSL

Mode: ADSL2 AnnexM EU-56
Type: Fast
Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 30.3 9.6
Attenuation (dB): 7.5 29.2
Output Power (dBm): -16.7 6.0
Attainable Rate (Kbps): 11684 1787
Rate (Kbps): 2063 519

h**p:// i40.tinypic.com /2i0g7f5.jpg

i got the result thanks for ur help!

check it out please did I have do anything for my torrent speed to increase
now iam getting average 120KBps, highest 180KBps

i Downloaded axxo torrents form mininova.org

i have these problem also ht*p://www .indiabroadband. net/bsnl-broadband/16371-limited-no-connectivity-bridge-mode-guys-plz-help-me.html

config:
TCP/IP connection changed to 50
Utorrent
setting half** to 50
OS: WInXP sp2
modem : bridge mode

@anbutorrent
The link given wrongly. It should be png instead of jpg.
Your ADSl stats are fine.
Default
i40.tinypic.com/2i0g7f5.png
img136.imageshack.us/img136/8620/modem.jpg

You can copy /paste the links as above and delete http and www to avoid errors.
Also when you go to Advanced settings in this page you can upload the image as annexure.


Para two:
Please type 192.168.1.1/look.html
to find out FW for this modem.
Please post data.

192.168.1.1/look.html

i had tried this page but nothing comes up! blank page

SNR (Downstream) 20.5 dB
SNR (Upstream) 19.0 dB
Line Attentuation(Downstream) 28.0 dB
Line Attentuation(Upstream) 13.0 dB



this is my result...please do comment on its improvements and all