TilhasBB
Formally Goden99
Premium
join:2000-08-05
canada
1 edit | SpeedTouch 516 Tweaking :)
Time for some Researching and Playing (trial and error)
Download
»www.2cent.de/dmt/st7/dmt.zip
If you downloaded the new firmware this wont work.
open it up.
Very nice piece of software, better than Alcatool.
1)
if you want to monitor your line stability, click on GainQ2 and click Start on SNR-Minitor Interval. After a while you will see a white line going threw the graph. I Dont really know how much it should go up and down but the less the better i guess.
2)
Go to special Misc option and enable the hidden 4 and 5th tabs.
I've noticed if i change the Target Noise Margin and hit apply / resync
it wont work.
If you click Option 2 and then change the Target Noise Margin it allows you to apply/resync and it changes.
Guys that don't get the full 5megabit or attainable is close to 100% can you play with it and post your results?
I am getting around 70% and when I set it to minimum I get 98% 5056 sync. So going up should allow you to increase sync but it will be less stable.
3)
I am not sure what Channel Characteristic. But it shows you an estimated loop length which is pretty cool.
Post your results  |
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bryanviper
join:2002-10-12
Toronto, CAN
 ·TekSavvy Solutions..
| Looks like a cool program.
To bad I cant run it since I'm using a router. I'll have to configure my router so I can access the modem, but i don't really feel like changing all my network settings lol
I'll have to see,
Thanks
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Computer: AMD AthlonXP 2800, 1GB, Seagate 500gb 7200rpm 16mb cache, ati All-In-Wonder X800 XT, 5mb DSL
»www.MaximumRepair.ca |
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l0thar
join:2005-12-29
Far Far Away
| reply to TilhasBB
That program seems VERY interesting, thanks TilhasBB!
I have a high attenuation line (53 dB currently) so it might help here. Will post later, still need to configure the modem. (what a pretty little beast it is. )
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R0CKY
TSI Rocky
Premium,VIP
join:2005-05-19
Chatham, ON
| LOL....
I have this funny feeling I'm going to get educated in a big way on how to tweak this thing until I can put wheels on it and drive it! 
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Rocky/TSIGUY - TekSavvy Solutions Inc. |
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donoreo
Premium
join:2002-05-30
North York, ON
| said by R0CKY  :LOL.... I have this funny feeling I'm going to get educated in a big way on how to tweak this thing until I can put wheels on it and drive it! Which is all information you can later use to serve your customers better.
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I cannot deny anything I did not say |
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l0thar
join:2005-12-29
Far Far Away
| reply to TilhasBB
Anyone brave enough to try the last two tabs(advanced options)?
The 5th tab has Power options, I wonder if it will convince the DSLAM to increase the transmission power levels.
Don't want to try them yet, just monitoring the modem to see how it compares with the SpeedStream 6520 it replaced.
So far, some impressions :
- a nice option, you can enable and configure time server options. It takes effect immediately, and synch modem time with the selected net servers. (6520 did that after being up for maybe a couple days, no option to configure the service.)
- I like how it keeps stats of total data transfers right on the main modem stats.
- also like how you can 'name' the computers on the network, instead of simply having MAC addresses.
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l0thar
join:2005-12-29
Far Far Away
| reply to TilhasBB
Here's a snapshot of the current stats on my modem.
Have 3 Mb/sec service, was Fast path for 11 months, then dropped, and after one week of Sympatico support calls came back, but interleaved.
One possible good thing I observed - the relative occupation on the Downstream seems to show 53%.
Assuming that 70% RCO (like shown on TilhasBB's image) is normal/acceptable, maybe I possibly get 4 Megabits from my line?
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Riazg
join:2005-01-01
Scarborough, ON
·TekSavvy Solutions..
| I belive this was mentioned in the Group Buy thread. The link to some more info:
»bbs.adslguide.org.uk/showthreade···=2470496 |
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TilhasBB
Formally Goden99
Premium
join:2000-08-05
canada
2 edits | 5 megabit might be pushing it.
can you rerun the program and dont start the snr monitor. that last box on the bottom right should give you an estimated loop length. what is it?
Your the perfect jinny pig
can you go into Modem Options and play with the Target SNR. Raise it 4 points hit option to then resync see what the % occuation is. and play with it post results
Riazg> Yes thats the link. Bicephale found it i belive.
Hummmm.
I am having some internet problems.
I would not lose sync but my internet would stop working for 1-3 seconds. msn signs out and my downloads stop then comes back.
Anyone else have these problems? |
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l0thar
join:2005-12-29
Far Far Away
| Will do in a day or two, but right now I just want to observe the modem and compare to the SpeedStream. Got disconnections with the SS, although they were short and mostly I got the same IP address.
The 546 doesn't seem to have disconnected at all yet, uptime is 8h20min.
Once I observe it and know how it works better, will play with the extra settings.
How about the 'Transmit Power' option on the 5th tab panel? I have a feeling that it's intended to raise the DSLAM output power 9send a request for that anyways). That could help people with large attenuations like mine.
Yeah, I know 5 Mbit/sec won't happen on my line, but maybe I can get 4 Mbit.
3 Megabit service worked well for almost a year before I had any problems. The wire length is about 4 Km according to Bell support people. DMT shows a vague estimate (3.8 to 6 Km) for wire lenght.
EDIT : used the TX Power option on 5th tab and a DSL resync. Seemed to raise the DSLAM transmit power from 18.5dB to 19 dB.
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TilhasBB
Formally Goden99
Premium
join:2000-08-05
canada
1 edit | here are my findings. one thing is obviouse.
HIGHER POWER Better stats...
The higher the target SNR the lower the attainable rate is.
setting Attab Atten snr power high/low snr
00 8870/1066 34/15.5 14.0/11.0 19.5/12.5 17/10
05 8154/1081 34/15.5 14.0/11.0 19.5/12.5 16/10
10 7435/1066 34/15.5 14.0/11.0 19.5/12.5 16/10
15 6741/1066 34/15.5 14.0/11.0 19.5/12.5 30/6
20 6019/1066 34/15.5 14.0/11.0 19.5/12.5 30/9
28 6107/1066 34/15.5 14.5/11.0 19.5/12.5 30/11
29 4880/1066 34/15.5 15.0/10.0 19.5/12.5 30/14
30 4848/1081 34/15.5 15.5/11.0 19.5/12.5 17/13
31 4719/1081 34/15.5 16.0/11.0 19.5/12.5 30/13
10 5495/1081 34/15.5 7.0/11.0 11.5/12.5 30/5
12 5266/1066 34/15.5 7.5/10.0 11.5/12.5 11/5
13 5107/1066 34/15.5 7.5/11.0 11.5/12.5 8/6
14 5010/1081 34/15.5 8.0/11.0 11.5/12.5 30/2
11 4913/1088 34/15.5 6.5/12.0 9.5/12.5 30/4
Default Setting (after a modem reboot)
12 7327/1066 34/15.5 14.0/11.0 19.5/12.5 30/7
I think the default settings are pretty good.
Anyone who is getting sub 5megabit want to play with your modem and show us what it can do |
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l0thar
join:2005-12-29
Far Far Away
1 edit | reply to Riazg
Had missed your post - Big thank you, as the thread you linked to is VERY informative.
Starting with how to do the SNR tweaking, it's not very clear in DMT.
This will get me started in the right direction.
EDIT :
Followed directions on the thread linked above. Used value '10' for modemoptions 00.
SNR just before applying setting was 8.0. After resync, came back at 15 dB. Now got to wait a few hours and see if it is stable.
Seems best to use number values for register 00 than the slider (which has no number values, and is more inaccurate, imo).
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TilhasBB
Formally Goden99
Premium
join:2000-08-05
canada
| The higher your getting your SNR the lower your attainable rate. your just increasing the rejection rate.
aka. you put a filter and anything lower than X amount won't even be used so your SNR seems higher because its rejecting all the ones that dont cut it. So I would increase the SNR just high enough so your attainble is around 85%-90% leave some head room. |
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l0thar
join:2005-12-29
Far Far Away
| In my case, what I am trying to do is find the highest possible SNR, with the best Occupancy on the line.
The setting I used improved the SNR, and the RCO is now about 48% (attainable being 6266 Kb/s).
Once these are tested for stability, I could approach Sympatico and request that they increase my synch rate for testing purpose. Not a full 5 Mb/s, but hopefully 4 Mbit might work for me... Showing them a good occupancy potential is crucial to get it.
These current settings have been on for about 5.5 hours, and the SNR ranged between 15 and a low of 13 dB. Good numbers for my line!
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TilhasBB
Formally Goden99
Premium
join:2000-08-05
canada | Post a picture of DMT please.
I think you can handle 5megbit now actually. |
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l0thar
join:2005-12-29
Far Far Away
| said by TilhasBB :Post a picture of DMT please. I think you can handle 5megbit now actually. Here it is - it's been stable since last night.
These modems are WAY better than the SpeedStreams.
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TilhasBB
Formally Goden99
Premium
join:2000-08-05
canada
| I dont like this
Received FEC : 18513
Received CRC : 4
Received HEC : 4
Transmitted FEC : 42
Transmitted CRC : 2
Transmitted HEC : 0
3811 - 6269 Loop Length hehehehe
Your on Interleave ouchh...
Attenuation at 52 SNR 14.
K can you try lower your SNR a bit but keep the attainable above 5600
Because I know for 5Megabit at 100% you need an attainable of 5532 atleast.
Also pump your Tx power from 19.0 to 19.5 (max her out)
Attainable line rate : 5532 kbit/sec
Fast used Atm rate : 5056 kbit/sec
Rel. capacity occupation : 100
How is your setup now?
modem to phone jack directly? (how long is the phone cable)
By the way USE the new phone cable you got with the modem its quite good. As good quality as the old nortel one I had. |
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l0thar
join:2005-12-29
Far Far Away
1 edit | The are some errors, FEC mostly, yeah. The wire is pretty long here, 4 Km according to Bell folks.
I had Fast path for 10 months, until November. Waited a month before calling Bell, we had so much rain, everything was soaked all over the place, etc. Finally, after a week of headaches and daily phone calls, got stable 3 Mb/s synch back, but interleaved.
Speeds have been good, so I did not complain.
Relative occupancy of 100%? Don't think the Test Centre folks will like that, lol. I plan to test and stabilize things, then ask for an increase to 4Mb/s, possibly.
Wiring here is pretty special, custom made to try get the best DSL signal. I posted some pictures and description on this thread in the Sympatico forum.
Basically, phone system split at the demarc, straight CAT5 run to a dedicated DSL jack. Modem provided 6 ft flat cable between modem jack and dedicated DSL wall jack. Other home phone wiring double-filtered right at the entry point.
The phone cord that came with the SpeedTouch is indeed nice, the best one I have seen so far. A very satisfying click, tight fit when it connects to the rj-11 jacks. I like it!! 
TX power - I tried placing the slider on 'MaxPower', but then you have to hit 'Modify' and it didn't seem to stick. Would be best to use a bit value on the boxes, but I don't know which to use.
Did the slider work for Max power for you?
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TilhasBB
Formally Goden99
Premium
join:2000-08-05
canada | I like your line setup very nice.
Mine is always on max but after playing with snr it goes up and down like it feels like you have to play with the modify and play with the settings
we should check the DMT site forums. |
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l0thar
join:2005-12-29
Far Far Away
| Thanks for the comment, I like the wiring too. Was worth it, a lot of GB came down that path, lol.. 
Came up with something that could help others. Bicephale had mentioned heat as a bit of concern for the SpeedTouch models. Then I did some reading on this thread.
Lifted up my 546 and it felt very warm on the underside, probably one of the chips is located on the underside of the circuit board and giving off heat.
Solution, used a couple of paperclip boxes (handiest object around atm) to raise the modem up a couple centimetres.
The heat I felt first time checking is no longer there - I think this might be a good idea, raise your modem to allow more airflow into the base holes.
Someone in that thread suggested using 4 plastic bottle caps, and boy, that should work just nice, they are the right size.
Tried reading the DMT site, but the little info there is all in German. The ThinkBroadband UK forums are probably our best bet, folks there have been using DMT for a while.
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