How to find my signal attenuation, SNR and sync speed ?

Tags: DSL, attenuation, SNR, DSLAM

Most DSL modems/routers have admin interface that allows for viewing the actual attenuation, SNR (signal-to-noise ratio) and sync speed (or ATU-x) values.

1. Find your router's IP - type ipconfig in command prompt and note the IP address value listed as the "Default Gateway". This is your router's IP address.

2. Connect to your router's admin interface - type your router's IP address into the address field of your web browser. You may have to use the default password to login to your router, we have an extensive list in our routers database.

3. Locate the status page - once you login look through the menus for something named "WAN", "Status", or "Connection". It should contain the values you're looking for:

* Signal Attenuation (Measured in dB) - may indicate the maximum sync speed you can get
* SNR (Signal to Noise Ratio) (Measured in dB) - higher is better
* TX Power Level (Measured in dBm) - current/available transmission power levels, max 20dBm
* Sync Speeds (or ATU-x) (Measured in kbps or bps) - bitrate from the exchange to the modem

See also: What is considered good DSL line attenuation ?

User Reviews/Comments:

rate: avg:

by anonymous - 2014-11-07 17:41

thanks buddy

by Studet - 2015-04-27 08:40

The SN in the router is defined as Margen not as level. Thus the lower is better. My router would require 6db to establish internet link. The higher values would not give any internet service. This may be the cas with others ?

by anonymous - 2015-10-01 20:15

Upstream max rate (kbit/s) 1186
Downstream max rate (kbit/s) 22484
Upstream line rate (kbit/s) 254
Downstream line rate (kbit/s) 1023
Line standard ADSL2+
Channel type
Interleaved
Upstream SNR (dB) 32.3
Downstream SNR (dB) 28.6
Upstream line attenuation (dB) 8
Downstream line attenuation (dB) 14
Upstream output power (dBmV) 4.8
Downstream output power (dBmV) 7.5
Upstream CRC 4
Downstream CRC 6
Upstream FEC 16
Downstream FEC 19

is it good or not ?

by anonymous - 2015-11-13 11:24

Upstream max rate (kbit/s) 1186
Downstream max rate (kbit/s) 22484
Upstream line rate (kbit/s) 254

by David - 2016-09-12 10:55

can someone please help me with this,
I was using a Dlink dsl 2750u router, then i switched to linksys Wag54g2 router.
suddenly my line attenuation decreased
with the Dlink it was around 42dB
but with linksys its around 10 dB now.

is this possible, may be the linksys is showing a wrong value??

thanks in advance

by darrell - 2020-11-05 22:43

hi in my Vodafone router with super fast 2 broadband.
has3 set's of numbers by attenuation DS1 10.6db DS225db DS337. 4db and i has an S. N. R. of 3.2fb.

i was trying to use the dpeed calculator faq sed something about using the 8 profile. i don't know what that is. any help / explanation would be greatly appreciated
many thanks

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