Hi,

I am interested (for the sake of comparison) to know what your DSL modem parameters are.

To find those parameters on a Thomson modem you need to do the following:
1) Log on to your modem's administrator interface at 192.168.1.254 (by default the username is Administrator and there is NO password).
2) On the menu to the left ... under "Broadband Connection" you have to click on "DSL Connection".
3) Then, on the upper right corner menu of the page that loads, click on "Details".

I'm talking about the following values:
Bandwidth (Up/Down) [kbps/kbps]: 256 / 1.024
Data Transferred (Sent/Received) [kB/kB]: 0,00 / 0,00
Output Power (Up/Down) [dBm]: 11,5 / 15,0
Line Attenuation (Up/Down) [dB]: 31,5 / 63,5
SN Margin (Up/Down) [dB]: 17,0 / 15,0

Please also include the location/area of your house and which "centrale" you are affiliated to.
SN Margin
According to some research on the Internet, any SN Margin (Down) value below 11.0 dB is rather bad and will cause you to experience several disconnections (modem "Broadband" and "Internet" lights go off).
Mine is 15,0 in the lines pasted above and it drops to 9,5 at night after 7:00 pm.
SN Margin
SNR means Signal to Noise Ratio. Simply put divide the Signal value by Noise Value and you get SNR. You need high SNR for a stable connection. In general, a higher signal to noise ratio will result in less errors.

* 6bB. or below = Bad and will experience no line synchronisation and frequent disconnections
* 7dB-10dB. = Fair but does not leave much room for variances in conditions.
* 11dB-20dB. = Good with little or no disconnection problems
* 20dB-28dB. = Excellent
* 29dB. or above = Outstanding
Line Attenuation.
When your Line Attenuation (Down) value is above 60.0 dB it means the maximum speed you can have is UP TO 512 kbps. My Line Attenuation (Down) is always at 63.5 dB.
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 "

Line attenuation also affects your speed.
* 75 dB+: Out of range for broadband
* 60-75 dB: max speed up to 512kbps
* 43-60dB: max speed up to 1Mbps
* 0-42dB: speed up to 2Mbps+
You can see from the numbers pasted above that my Bandwidth (Down) value is set to 1,024 kbps (probably for the double speed at night since I have a gaming plan with Sodetel).

I have called Sodetel and asked them to remove my double speed option (they are only activating it from 8:00 pm till 11:00 PM anyway) and so they should set my Bandwidth (Down) value to 512 kbps.

I hope this will in turn affect the stability of my connection (no idea if things will even get worse when the weather deteriorates). I am currently getting disconnected once per day on average and I don't know if it's because they are working on the new equipment they have installed which is also causing many other users to get disconnected as well.
I'm with IDM 512 package and here is what I got:

Bandwidth (Up/Down) [kbps/kbps]: 508 / 1.024
Data Transferred (Sent/Received) [kB/kB]: 0,00 / 0,00
Output Power (Up/Down) [dBm]: 11,5 / 15,0
Line Attenuation (Up/Down) [dB]: 20,0 / 30,5
SN Margin (Up/Down) [dB]: 30,5 / 32,5
I'm with IDM 512k too, Bir Hasan Central:
Bandwidth (Up/Down) [kbps/kbps]: 508 / 1.021
Data Transferred (Sent/Received) [KB/KB]: 0,00 / 0,00
Output Power (Up/Down) [dBm]: 12,0 / 19,5
Line Attenuation (Up/Down) [dB]: 21,0 / 43,5
SN Margin (Up/Down) [dB]: 19,0 / 33,5
SNR Margin (dB): 31.8 33.9
Attenuation (dB): 25.5 11.6
Output Power (dBm): 3.1 1.7
Attainable Rate (Kbps): 10240 1359
Rate (Kbps): 1020 254
MSGc (number of bytes in overhead channel message): 73 13
I'm with cyberia 512Kbps, and here's mine
Bandwidth (Up/Down) [kbps/kbps]: 508 / 1.021
Data Transferred (Sent/Received) [KB/KB]: 0,00 / 0,00
Output Power (Up/Down) [dBm]: 12,0 / 5,5
Line Attenuation (Up/Down) [dB]: 18,5 / 30,0
SN Margin (Up/Down) [dB]: 29,5 / 31,5
Ogero 256Kbps(Saida Ogero Central, the Building is almost ~1.66-~1.72KM from my house in a straight line):
Bandwidth (Up/Down) [kbps/kbps]:	125 / 255

Data Transferred (Sent/Received) [kB/kB]:	0,00 / 0,00

Output Power (Up/Down) [dBm]:	5,0 / 14,0

Line Attenuation (Up/Down) [dB]:	27,5 / 50,5

SN Margin (Up/Down) [dB]:	32,0 / 26,5
Edit: forgot to add Central
Terranet 256 kbps plan, bekaa, Ali el Nahri Central.
Bandwidth (Up/Down) [kbps/kbps]: 124 / 256
Data Transferred (Sent/Received) [kB/kB]: 0,00 / 0,00
Output Power (Up/Down) [dBm]: 11,5 / 0,0
Line Attenuation (Up/Down) [dB]: 30,5 / 40,0
SN Margin (Up/Down) [dB]: 34,0 / 26,5
Hmmm, after seeing all these results I'm wondering why my SN Margin (Down) is so bad. As I said it drops to around 9 dB at night.

How far do you guys live from your "Centrale". I live about 4km away from mine.
DG try to check the cable from the telephone box to your house.
I had to change mine as i had several disconnections and it turned out to be the cable that was eaten at several places by a "jardon"....
And also never use any modem other than thomson (i think it's the Broadcom chipset).
If nothing else works, try to change the modulation of the modem to lower than G.992.5
and dsl path mode to interleaved
partam wroteDG try to check the cable from the telephone box to your house.
I had to change mine as i had several disconnections and it turned out to be the cable that was eaten at several places by a "jardon"....
And also never use any modem other than thomson (i think it's the Broadcom chipset).
If nothing else works, try to change the modulation of the modem to lower than G.992.5
and dsl path mode to interleaved
You mean the cable that runs from the telephone box on the street light pole (3emoud el kahraba) to my building's electrical room (2oudit el kahraba) ?
Because I already had an electrical technician change the cable that goes from the building's electrical room up to my house.

How exactly do I change the modulation of the modem and the dsl path mode to interleaved ?
No don't you touch any 3amoud...i meant from the 2oudit el kahraba up, but you say that you already changed it.
Try to google thomson force interleaved path.
You will have to use telnet
Thanks for proposing the solution above to help increase my SN Margin (Down).

However, I have one major concern when it comes to using Interleaving.
It might increase my latency (explained here: http://www.techbroadband.net/wiki/DSL_interleaving)

The only time when it could actually decrease my latency (as explained in the link above again) is when my
line has a very bad quality to start with because packets won't need to be re-transmitted as much.

Sodetel should reduce my Bandwidth (Down) from 1,024 to 512 today. I think this will, in turn, improve my SN Margin (Down)... fingers crossed.

Btw, I found a nice little article on how to change the modulation for Thomson 585 V7 modems.
Here you go: http://community.plus.net/library/hardware/forcing-adsl-modulation-on-thomson-585v7/
I'll play around with the settings and let you know if there's anything new.
Sodetel, based on my demand, has reduced my Sync speed (the speed at which my modem synchronizes with the "exchange").
Previously it was 256/1.024 ... now it's 128/512.

The good thing though is that my SN Margin (Up/Down) [dB] is now 21,0 / 19,0.
This is much better than what it used to be (17,0 / 15,0 and sometimes at night it would drop as low as 17,0 / 8,0).

I know, you'll say I have lost some speed but my connection wasn't delivering much above 128/512 anyway even when I had double speed at night (due to the noise on the line).
I also think the noise was increasing my latency as it was causing some packets to be sent again.
Cyberia 256/128 Kbps (Centrale: Kfaryassine)
Bandwidth (Up/Down) [kbps/kbps]: 125 / 255
Line Attenuation (Up/Down) [dB]: 6,0 / 18,0
SN Margin (Up/Down) [dB]: 33,0 / 35,0
here are mine, Isp is Terranet. Tripoli Tall Central about 1 km away.
SNR Margin (dB): 30.7  13.0  
Attenuation (dB): 31.0  15.6  
Output Power (dBm): 12.2  0.0  
Attainable Rate (Kbps): 12492  284  
Rate (Kbps): 1023  248
4 months later
Hello all I hope i find someone to read and get a reply soon :)
one month ago i subscribed for DSL from terranet and when i got the modem at first i didnt get any dsl signal so i calld them and they contacted ogero and then ogero fixed the link
then after waiting more than 5 minutes i got a signal but when trying to configure the modem it disconnects
costumer care said it may be from the line so the line may be week (i have the white line that have 3 colors inside -white blue and red- pluged in the phone box and directly to my window where i connected it to a switch and then plugged the filter
i noticed that when i use more than one phone appareil i loose the connection but anyway ogero told me to get a new line with four colors in it so i got it and waiting them to come - but actually now am connected but the internet speed is not convincing and i m havving disconnection from time to time and sunday night i had no luck to connect and sometimes it disconnects from 7 to 11:30 pm and am waiting ogero to change the line to know if the problem is in it - (i live near the airport on airport street close to bridge coming from saida)related to Elissar central

here are my modem details at this moment

---------------------------------------------------------
DSL Connection

Link Information

Uptime: 0 days, 2:44:31
DSL Type: G.992.5 annex A
Maximum Bandwidth (Up/Down) [kbps/kbps]: 120 / 4.294.695
Bandwidth (Up/Down) [kbps/kbps]: 60 / 256
Data Transferred (Sent/Received) [MB/MB]: 24,54 / 25,81
Output Power (Up/Down) [dBm]: 12,0 / 13,5
Line Attenuation (Up/Down) [dB]: 55,5 / 59,5
SN Margin (Up/Down) [dB]: 11,5 / 25,5
Vendor ID (Local/Remote): TMMB / GSPN
Loss of Framing (Local/Remote): 75.222 / 0
Loss of Signal (Local/Remote): 1 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 18 / 0
FEC Errors (Up/Down): 0 / 0
CRC Errors (Up/Down): 90 / 27
HEC Errors (Up/Down): 13 / NA
-----------------------------------------------
i wish any one can help with the nombers so we may find the problem and search for a solution
Regards
Check my 1st post for more info on parameter values.

You seem to have both a high up and down Line Attenuation (but still within acceptable parameters).
50dB-60dB is poor and may experience connectivity issues.

Your SN Margin (UP) is a bit low for a 120kbps up sync speed.
11dB-20dB. = Good with little or no disconnection problems. Below 11dB is not something you really want.

Normally the higher the sync speed the lower your SN margin becomes.
As an example, if you sync at 128/512 (up/down) with a SN margin 17,5 / 25,5 then suddenly your ISP changes your sync speed to 128/1024 ... you could expect the down margin to somehow drop from 25.5 to around 22 dB.
Thank u bro I read ur first post but i still have things I didnt understand :D

Today ogero changed my line and this is wht i get now

Uptime: 0 days, 0:04:10
DSL Type: G.992.5 annex A
Maximum Bandwidth (Up/Down) [kbps/kbps]: 120 / 4.294.435
Bandwidth (Up/Down) [kbps/kbps]: 60 / 256
Data Transferred (Sent/Received) [kB/kB]: 55,00 / 403,00
Output Power (Up/Down) [dBm]: 12,0 / 14,5
Line Attenuation (Up/Down) [dB]: 56,0 / 60,0
SN Margin (Up/Down) [dB]: 13,0 / 30,5
Vendor ID (Local/Remote): TMMB / GSPN
Loss of Framing (Local/Remote): 12 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 22 / 0
FEC Errors (Up/Down): 0 / 0
CRC Errors (Up/Down): 1 / 1
HEC Errors (Up/Down): 0 / 0

my account is from terranet 256 plan with double speed 8 pm -8 am though am not feeling a lot of difference :D
concerning the SN margin is this problem from the line of from the ISP or from ogero telephone base?
and how can the line attenuation issue be better is it from ogero or terra or needs test?!
i am not well experienced in telecommunication issues so i wish i can get good info and help from u and thank u again :)
Line Attentuation is mainly affected by your distance from the "Central" phone office you are affiliated to. The bigger the distance... the higher the attenuation. Whatever ISP you pick, I doubt it will improve your line attenuation.

SN Margin is affected by a lot of things such as the weather (if it's humid and rainy), any appliances like a TV etc... near the modem, and with the quality of your phone line (we all know how bad and old the phone lines
are in Lebanon).
SN Margin is normally higher in the early stages of the day and always decreases when the night approaches (more electrical stuff generating noise around you).