Internet in Lebanon - General Questions

My max bandwith has just jumped to 19500, its highest level ever.

Kareem wrote

AymanS wroteI live in rouche , 500 m from ras beirut central
Max rate shows 19mb , actual rate is 12mb
Down. Up
Snr 15.8. 11
Line atten. 12.1. 11.2
Actual rate. 12.8mb. 0.95
Max rate 19mb. 0.95
Crc. 1148. 46
What's the prb why cant i get higher speeds

Because your SNR Margin is probably very high. The lower the SNR Margin, the higher the actual rate.

Basically most ISPs outside lebanon have SNR marging around 6-9 dB. Below 6 dB you will start experiencing disconnections.

If I were you, I would reduce the SNR marging to 6.8 dB ( -9 dB ) I bet you'll get 16 Mbps easily.

Is there an easy way to do it , or should i call ogero ?

AymanS wrote

Kareem wrote

AymanS wroteI live in rouche , 500 m from ras beirut central
Max rate shows 19mb , actual rate is 12mb
Down. Up
Snr 15.8. 11
Line atten. 12.1. 11.2
Actual rate. 12.8mb. 0.95
Max rate 19mb. 0.95
Crc. 1148. 46
What's the prb why cant i get higher speeds

Because your SNR Margin is probably very high. The lower the SNR Margin, the higher the actual rate.

Basically most ISPs outside lebanon have SNR marging around 6-9 dB. Below 6 dB you will start experiencing disconnections.

If I were you, I would reduce the SNR marging to 6.8 dB ( -9 dB ) I bet you'll get 16 Mbps easily.

Is there an easy way to do it , or should i call ogero ?

Depends on which modem you have.

Kareem wrote

AymanS wrote

Kareem wrote

Because your SNR Margin is probably very high. The lower the SNR Margin, the higher the actual rate.

Basically most ISPs outside lebanon have SNR marging around 6-9 dB. Below 6 dB you will start experiencing disconnections.

If I were you, I would reduce the SNR marging to 6.8 dB ( -9 dB ) I bet you'll get 16 Mbps easily.

Is there an easy way to do it , or should i call ogero ?

Depends on which modem you have.

I have a tplink modem

AymanS wrote

Kareem wrote

AymanS wrote Is there an easy way to do it , or should i call ogero ?

Depends on which modem you have.

I have a tplink modem

If you have telnet access to your router ( im not sure which model it is ) you can login via telnet and type :

adslctl configure –snr N

Where N depends on your SNR Margin and target SNR margin :

Your current target SNR
margin Your desired SNR target margin
Number you should enter

6 dB 4.5 dB 75
6 dB 3 dB 50
9 dB 6 dB 50
9 dB 4.5 dB 25
9 dB 3.5 dB 1
12 dB 9 dB 50
12 dB 6.5 dB 1
12 dB 6 dB 65550
12 dB 4.5 dB 65525
12 dB 3 dB 65500
15 dB 12 dB 50
15 dB 9 dB 65550
15 dB 6 dB 65500
15 dB 4.5 dB 65475
15 dB 3 dB 65450
18 dB 15 dB 50
18 dB 12 dB 65550
18 dB 9 dB 65500
18 dB 6 dB 65450
18 dB 4.5 dB 65425
18 dB 3 dB 65400

Kareem wrote

Ahmad Toutounji wrote

Kareem wrote
Not really. Attenuation is good. The problem as explained earlier is from Ogero side. I bet they're limiting the power output of SNR somehow.

@Ayman : where do you live ?

I was talking about snr, it's low

It's not SNR, it's SNR MARGIN which is a different story. Out aim is to lower the SNR MARGIN as much as we can so that we can achieve maximum throughput without resyncs

Yes i know the difference between the two... i didn't type the whole word in sake of time

Is it possible to tweak snr on a Technicolor tg582n? I know it's mostly done on broadcom chipset but I can't find anything anywhere concerning this modem in particular

vengeance666 wroteIs it possible to tweak snr on a Technicolor tg582n? I know it's mostly done on broadcom chipset but I can't find anything anywhere concerning this modem in particular

Have you tried this ? it basically does the job by connecting through telnet and modify it.

http://www.maniaradio.it/en/bktsnrset-1.html

Kareem wrote

vengeance666 wroteIs it possible to tweak snr on a Technicolor tg582n? I know it's mostly done on broadcom chipset but I can't find anything anywhere concerning this modem in particular

Have you tried this ? it basically does the job by connecting through telnet and modify it.

http://www.maniaradio.it/en/bktsnrset-1.html

The TG582n is a broadcom chipset, I'll give this a try.

vengeance666 wrote The TG582n is a broadcom chipset, I'll give this a try.

Same here. Please let me know what you come up with. Thank you in advance.

it doesn't work with the TG582n .
However, i tried it with Linksys X1000 and Speedtouch. SNR margin changes but no speed increase at all. It is Locked by the DSP (I am with IDM however)

Btw this trick prove they _lock speed_ and it directly contradicts with open speed claims.

nuclearcat wroteBtw this trick prove they _lock speed_ and it directly contradicts with open speed claims.

100% true.
Also, can they manipulate the SNR margin? it seems that they can change it (increase/decrease it) to a certain degree at will from their end.

SNR margin technically just how much "reserve" DSLAM or modem keeps, by picking speed, that gives this margin.
SNR value(noise margin) is directly corellating (in simple words) difference between signal and noise(floor) where this signal wont be recognizable.
So they can set high "SNR margin" and modem will be forced to sync on lower speeds, to keep this margin.
If SNR fluctuating a lot, it is feasible to set high margin, to avoid frequent disconnections.
But it looks like as people report there is fixed max speed set on DSLAM,irrelevant to SNR.

nuclearcat wroteUhm.. i explained really bad.
Lets try easier. They can set. But you can cheat on them (if modem let you), because some modem may lie to them (hey, my SNR n+(some value)), thats called here "SNR tweaking". DSLAM wont know real downlink SNR without asking modem about that.
But they can limit max speed on DSLAM as well, this can't be "hacked".

I might be wrong on that, it require reading in depth seems closed documentation about ADSL standards.

Seems logical as to the fact that upstream can't be tweaked.

On another note:
Sodetel and Ogero don't lock the speed.
IDM does.

Xsever wrote

vengeance666 wrote The TG582n is a broadcom chipset, I'll give this a try.

Same here. Please let me know what you come up with. Thank you in advance.

Doesn't work on this modem for some reason, even tho it's a Broadcom chipset. But as others mentioned speed is probably DSLAM capped so there is nothing we can really do about it. 10.5 mbits are good I should stop being greedy :)

Kareem wrote

AymanS wroteI live in rouche , 500 m from ras beirut central
Max rate shows 19mb , actual rate is 12mb
Down. Up
Snr 15.8. 11
Line atten. 12.1. 11.2
Actual rate. 12.8mb. 0.95
Max rate 19mb. 0.95
Crc. 1148. 46
What's the prb why cant i get higher speeds

Because your SNR Margin is probably very high. The lower the SNR Margin, the higher the actual rate.

Basically most ISPs outside lebanon have SNR marging around 6-9 dB. Below 6 dB you will start experiencing disconnections.

If I were you, I would reduce the SNR marging to 6.8 dB ( -9 dB ) I bet you'll get 16 Mbps easily.

My SNR Margin is 20 or 6 ?


DSL Type: ITU-T G.992.5

Bandwidth (Up/Down) [kbps/kbps]: 766 / 13.997

Data Transferred (Sent/Received) [MB/GB]: 240,57 / 4,98

Output Power (Up/Down) [dBm]: 11,9 / 18,4

Line Attenuation (Up/Down) [dB]: 17,0 / 27,0

SN Margin (Up/Down) [dB]: 20,5 / 6,9