http://www.dslreports.com/forum/low-snr-11699497 en Wed, 22 May 2013 14:42:51 EDT Wed, 22 May 2013 14:42:51 EDT http://www.dslreports.com/forum/Re-low-snr-12462658
My wiring box in the basement is just right next to hydro box. I am wondering whether this causes problem. I will try to route a wire from demarc to my modem. Thanks.]]> http://www.dslreports.com/forum/Re-low-snr-12462658 Sun, 23 Jan 2005 09:40:15 EDT http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12455448 --
CiG]]> http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12455448 Sat, 22 Jan 2005 13:36:04 EDT http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12455103 It might not give him the full 3meg sync but he might improve and might get better signal]]> http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12455103 Sat, 22 Jan 2005 12:58:34 EDT http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12452475 http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12452475 Sat, 22 Jan 2005 01:35:42 EDT http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12446980
Your SNR is low. It really sounds like you have bad wiring in your house.
With out further tests there is no way to find out.

Best thing to do before calling Bell or your ISP to do test is to go outside. UNPLUG the house and plug your modem in if you have the jack demarc. if you have the two wire demarc get a phone wire you don't need and cut the head of and strip the two wires. unplug the house and get yours and the bell wires to touch.
Have an extension cord ofcourse with modem and if you don't have a laptop get a long ethernet wire and run it to your pc and check results.
If the SNR increases more than 3~5 points and attenutation drops and your sync increases by over 200 then you have a wiring problem. Try splitting the phone wire from there. Have it split there directly. one directly to your modem other to filter then to your house. (making your own Pot Splitter)]]> http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12446980 Fri, 21 Jan 2005 14:46:02 EDT http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12446281 said by gaosan:


bylo,
I do not understand what "RX FEC" means here. my guess is all dada I received was encoded by FEC, so it is not error indicator but just number of data I received. The only error showed should be in "RX CRC". Is this true? May be I need dig some web pages to find out what it exactly means.My understanding is that FEC (Forward Error Correction) is a means of adding redundancy such that transmission errors can be corrected by the recipient without having to get the sender to resend the data.

My SS6300 (which has been up for some 44 days now) shows RX FEC = 0 and RX CRC = 530. I'm on a reduced speed line (1768/640) with SNR = 8 and Atten of 44db. Even with those stats I experience the occasional DSL disconnection, however the SS6300 seems to be able to recover without a reboot.

P.S. If a high RX FEC is normal, i.e. indicates amount of data transferred rather than errors, then why is your TX FEC zero?

[Edit] I echo the suggestion to try connecting your DSL modem directly to the demarc so as to rule out bad house wiring. If possible, disconnect the house wiring from the demarc when you perform this test.]]> http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12446281 Fri, 21 Jan 2005 13:14:58 EDT http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12446152 I do not understand what "RX FEC" means here. my guess is all dada I received was encoded by FEC, so it is not error indicator but just number of data I received. The only error showed should be in "RX CRC". Is this true? May be I need dig some web pages to find out what it exactly means.

My connection is very stable. I got a router behind the modem. My connection is always connected, never drop.]]> http://www.dslreports.com/forum/Re-Low-speed-any-chance-to-go-to-15-M-12446152 Fri, 21 Jan 2005 12:59:16 EDT http://www.dslreports.com/forum/Re-low-snr-12445870 said by gaosan:

Here is my line stats. SNr 6.5, atten 63.5.
Can I get better profile? I am on 928k/160k.

Thanks.
Start by connecting your modem to the demarc point. That's were Bell Canada's wire comes to your house and other wires go the rest of your house. Test to see if the speed is better or worse.

Leathal]]> http://www.dslreports.com/forum/Re-low-snr-12445870 Fri, 21 Jan 2005 12:27:16 EDT http://www.dslreports.com/forum/Re-low-snr-12445842 said by cybersnow:

I said that his attenuation is "OK". It means that you can use it without any problems but if you get something higher than that, you will get problems. Attenuation of 50 will not cause an interruption of your sympatico service.
Yes but line attenuation also plays a part in his SNR being too low. So it's not OKAY at all. The higher line attenuation is the lower the SNR will be.

Here's a good table regarding attenuation:

»www.zianet.com/elm-st-station/coax-los.html

Leathal]]> http://www.dslreports.com/forum/Re-low-snr-12445842 Fri, 21 Jan 2005 12:23:52 EDT http://www.dslreports.com/forum/Re-low-snr-12444086 said by gaosan:

Here is my line stats. SNr 6.5, atten 63.5.
Can I get better profile? I am on 928k/160k.It's doubtful. Look at the number of errors: ~3 million per hour! It's amazing that you get connected at all.

How often do you lose your connection?]]> http://www.dslreports.com/forum/Re-low-snr-12444086 Fri, 21 Jan 2005 08:25:35 EDT http://www.dslreports.com/forum/Re-low-snr-12443456 http://www.dslreports.com/forum/Re-low-snr-12443456 Fri, 21 Jan 2005 03:22:11 EDT http://www.dslreports.com/forum/Re-low-snr-12442036 Can I get better profile? I am on 928k/160k.

Thanks.

]]> http://www.dslreports.com/forum/Re-low-snr-12442036 Thu, 20 Jan 2005 22:59:13 EDT http://www.dslreports.com/forum/Re-low-snr-11733899 http://www.dslreports.com/forum/Re-low-snr-11733899 Sat, 30 Oct 2004 22:45:33 EDT http://www.dslreports.com/forum/Re-low-snr-11733891 http://www.dslreports.com/forum/Re-low-snr-11733891 Sat, 30 Oct 2004 22:44:20 EDT http://www.dslreports.com/forum/Re-low-snr-11732786
Good job of troubleshooting!]]> http://www.dslreports.com/forum/Re-low-snr-11732786 Sat, 30 Oct 2004 20:08:00 EDT http://www.dslreports.com/forum/Re-low-snr-11732644 http://www.dslreports.com/forum/Re-low-snr-11732644 Sat, 30 Oct 2004 19:48:06 EDT http://www.dslreports.com/forum/Re-low-snr-11717443
And I am not on the 3meg profile. I am on 1.7/640 profile listed on the page. And my line is capable of a higher sync, so it is not struggling to sync at 3008/800.
--
Argue opinions using facts. Not facts using opinions.]]> http://www.dslreports.com/forum/Re-low-snr-11717443 Thu, 28 Oct 2004 23:10:09 EDT http://www.dslreports.com/forum/Re-low-snr-11716546
So you guys either have 3Meg Fast path, what the max that your modem is able to get from Bell, or you have Interleave with same..

Leathal]]> http://www.dslreports.com/forum/Re-low-snr-11716546 Thu, 28 Oct 2004 21:36:33 EDT http://www.dslreports.com/forum/Re-low-snr-11714312 Canadian Broadband FAQ »What are all the different speed profiles available?

I am also on a 640kbit upload profile.
--
Argue opinions using facts. Not facts using opinions.]]> http://www.dslreports.com/forum/Re-low-snr-11714312 Thu, 28 Oct 2004 17:33:04 EDT http://www.dslreports.com/forum/Re-low-snr-11714126
3 yes my modem is conected to the dmark... since i am with igs not sympatico.. its seems bellnexia shoots down my trouble reports from my isp saying my line is to long and i can love it or leave it]]> http://www.dslreports.com/forum/Re-low-snr-11714126 Thu, 28 Oct 2004 17:12:16 EDT http://www.dslreports.com/forum/Re-low-snr-11714060 said by jett:

Attainable line rate : 1140 kbit/sec
Attainable Atm rate : 864 kbit/sec
Used line rate : 1112 kbit/sec
Fast used Atm rate : 0 kbit/sec
Interleaved used Atm rate : 864 kbits/sec
Rel. capacity occupation : 98
Noise Margin : 5 dB
Line attenuation : 61 dB
Output Power : 15 dBm

better then me :\ you think someone fooked with my line card ? and if i cancel my dsl and wait a week and then subscribe to sympatico it would improve anything ? (with igs now) my service with sympatico was 100% maxed out 1mbit
igs was 100% 1mbit until about 8 months ago
Have you asked Bell how far you are away from your CO? Have you tried to see if they will come and check your line? Have you tried connected your modem to your demarc bypassing your house lines? These steps are important, you don't want a Bell guy coming to your house to say the problem is inside your house.. Any work they do inside which requires them to use a screw driver will cost you $85 per hour, minium 3 hours! ;)

Leathal]]> http://www.dslreports.com/forum/Re-low-snr-11714060 Thu, 28 Oct 2004 17:04:42 EDT http://www.dslreports.com/forum/Re-low-snr-11713561 said by jett:

---

if i cancel my dsl and wait a week and then subscribe to sympatico it would improve anything? (with igs now)

---

Likely no.]]> http://www.dslreports.com/forum/Re-low-snr-11713561 Thu, 28 Oct 2004 16:13:33 EDT http://www.dslreports.com/forum/Re-low-snr-11713480 Attainable Atm rate : 864 kbit/sec
Used line rate : 1112 kbit/sec
Fast used Atm rate : 0 kbit/sec
Interleaved used Atm rate : 864 kbits/sec
Rel. capacity occupation : 98
Noise Margin : 5 dB
Line attenuation : 61 dB
Output Power : 15 dBm

better then me :\ you think someone fooked with my line card ? and if i cancel my dsl and wait a week and then subscribe to sympatico it would improve anything ? (with igs now) my service with sympatico was 100% maxed out 1mbit
igs was 100% 1mbit until about 8 months ago]]> http://www.dslreports.com/forum/Re-low-snr-11713480 Thu, 28 Oct 2004 16:05:55 EDT http://www.dslreports.com/forum/Re-low-snr-11712443 http://www.dslreports.com/forum/Re-low-snr-11712443 Thu, 28 Oct 2004 14:07:07 EDT http://www.dslreports.com/forum/Re-low-snr-11710645
There is no such thing as a 2.5M profile. There is only 1.5M and 3M, thus you are a 3M profile that will give you the highest possible speed your modem/line can handle. Your line attenuation is so high that its probably why your upstream maxes out at 640k instead of 800k.

shmore2,

Your attenuation is pretty high that's why you are getting 5 SNR, if it were lower, say in the thirties you would be getting around 15 to 20 SNR so don't listen to cybersnow. ;)

Leathal]]> http://www.dslreports.com/forum/Re-low-snr-11710645 Thu, 28 Oct 2004 10:11:30 EDT http://www.dslreports.com/forum/Re-low-snr-11710266
thanks]]> http://www.dslreports.com/forum/Re-low-snr-11710266 Thu, 28 Oct 2004 09:06:57 EDT http://www.dslreports.com/forum/Re-low-snr-11710216 said by shmore2:



cgigate
what profile are you on?
My line stat, it looks bad, but it is very stable! I'm on 2.5M profile

--- DSL Status
DSL State - Up

Tx Rx
CRC Errors 0 0
FEC Errors 0 0
HEC Errors 0 0
NCD Errors 0 0
LCD Errors 0 0
LOS Errors - 0
SEF Errors - 0

--- ATU-R Channel Info
Current Tx Rate - 640000
Previous Tx Rate - 0

--- ATU-C Channel Info
Current Tx Rate - 2112000
Previous Tx Rate - 0

--- ATU-R Physical Layer Info
Current SNR Margin - 5.0
Current Attenuation - 63.5
Current Status:
No defects detected
No loss of framing detected
No loss of signal detected
No loss of power detected
No loss of signal quality detected

--- ATU-R Line Status
Line Coding - DMT
Line Type - Interleaved
Actual ADSL Mode - G.DMT
Requested ADSL Mode - Multi]]> http://www.dslreports.com/forum/Re-low-snr-11710216 Thu, 28 Oct 2004 08:57:37 EDT http://www.dslreports.com/forum/Re-low-snr-11708598
Also be sure that you don't have electric wires near of your modem or your phone wire.]]> http://www.dslreports.com/forum/Re-low-snr-11708598 Thu, 28 Oct 2004 00:26:01 EDT http://www.dslreports.com/forum/Re-low-snr-11705974
I have seen one case were a friend of mine had a short in his house which caused his DSL performance to be low. Once he ran all new wires to the outside box, and the Bell guy it was good he started to get proper speeds.

Leathal
]]> http://www.dslreports.com/forum/Re-low-snr-11705974 Wed, 27 Oct 2004 19:56:06 EDT http://www.dslreports.com/forum/Re-low-snr-11702058 what profile are you on?]]> http://www.dslreports.com/forum/Re-low-snr-11702058 Wed, 27 Oct 2004 12:52:33 EDT http://www.dslreports.com/forum/Re-low-snr-11702031 but my Attenuation is even higher (63.5)]]> http://www.dslreports.com/forum/Re-low-snr-11702031 Wed, 27 Oct 2004 12:49:49 EDT http://www.dslreports.com/forum/Re-low-snr-11701902
--- DSL Status
DSL State - Up

Tx Rx
CRC Errors 2 1898
FEC Errors 0 0
HEC Errors 0 0
NCD Errors 0 0
LCD Errors 0 0
LOS Errors - 0
SEF Errors - 0

--- ATU-R Channel Info
Current Tx Rate - 800000
Previous Tx Rate - 0

--- ATU-C Channel Info
Current Tx Rate - 2112000
Previous Tx Rate - 0

--- ATU-R Physical Layer Info
Current SNR Margin - 5.0
Current Attenuation - 50.5
Current Status:
No defects detected
No loss of framing detected
No loss of signal detected
No loss of power detected
No loss of signal quality detected

--- ATU-R Line Status
Line Coding - DMT
Line Type - Fast
Actual ADSL Mode - G.DMT
Requested ADSL Mode - Multi]]> http://www.dslreports.com/forum/Re-low-snr-11701902 Wed, 27 Oct 2004 12:34:21 EDT http://www.dslreports.com/forum/Re-low-snr-11701397
Leathal]]> http://www.dslreports.com/forum/Re-low-snr-11701397 Wed, 27 Oct 2004 11:29:12 EDT http://www.dslreports.com/forum/low-snr-11699497 http://www.dslreports.com/forum/low-snr-11699497 Wed, 27 Oct 2004 03:41:12 EDT