dslrocker3
join:2002-05-26
Toronto
1 edit | reply to dslrocker3
Re: Help/Advice with my Line Statistics please
Just to clarify, I have no doubt that my internal wiring is really screwed up. At the demarc, the connection is screwed up too though when compared to what the connection used to be.
Bell did agree to send a techncian again tomorrow afterall. Something has happened to the line obviously when the maximum attainable rate on fast path suddenly went from about 3000 to maybe about 3300 Kbps all the way down to about 2100Kbps. if the techncian can prove the the sudden signal drop is on my end and he/she knows how to fix it, I might just have them perform that repair. Any idea of what the cost for something like this would be (rewiring)? |
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dslrocker3
join:2002-05-26
Toronto
1 edit | reply to dbsanfte
said by dbsanfte  :FECs are just flipped bits that get automagically fixed via the wonders of parity. They don't cause retransmission of frames, and so don't affect speed. It's the CRC errors you need to worry about. I get somewhere around 7 million FECs per hour, and yet only maybe 20 CRCs in that period, and a solid connection at 3.5dBm. So I guess that means that the 45000 rx FEC is not a problem because they were corrected and that the 5 rx crc and 0 tx crc in the last 10 hours 20 minutes is minor. This is how it has been since the profile change down to 1728/640 and after I switched my SS5200 back to the ST516. |
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Bicephale
join:2005-09-24 | FEC Errors are still representative of noise so these can
be useful when one wishes to detect daily patterns but
it seems to me another avenue is going to be explored.
Good luck! |
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ex bell
@cgocable.net
| reply to dslrocker3
I think the starting rate for ISW repair is $99.00 and up depending on how long he is there, plus materials.
It is next to impossible to get a straight answer from Bell on this.
I do ISW repairs and customers have been told been told so many stories from Bell I don't know what to believe anymore.
Remember that you can do the repair yourself or call a private guy.
There are ex bell guys in the phone book under Telephone Installation and Repair.
If you get Bell you are supposed to be able to get an estimate first. |
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dslrocker3
join:2002-05-26
Toronto
2 edits | reply to dslrocker3
I'm not even going to ask.... pooring rain outside, miserable day and suddenly this happens... I wonder if it is something that changed on it's own or if Bell found a problem spot and did something. |
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dslrocker3
join:2002-05-26
Toronto
1 edit | ... and now with the settings tweaked a little...
I turned the target snr in DMT 7.35 down 2 notches from the default to what I believe tells the modem to accept a overall RX SNR of 6.0 dB to lower the relative occupancy. Does the Test Centre see that drop in occupancy of a few extra percent? I'm just trying to add a little extra overhead to convince them to allow the 2496/800 profile again. |
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Bicephale
join:2005-09-24
 ·TekSavvy Solutions..
| Unless there's improvement with your wiring you'll have
a trade-off to make. 2496/800 Kbps would be a win-win
situation, no trade-off there so expect 2496/512 Kbps
Interleaved instead. Twelve dB DownStream SNR Margin
should make the Thomson SpeedTouch 5x6 stable. |
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dslrocker3
join:2002-05-26
Toronto
4 edits | reply to dslrocker3
With the open trouble ticket, should I leave my Speedtouch 516 hooked up or have the Speedstream 5200 E242 connected intstead?
I just hooked the 5200 E242 and it is giving a SNR of a couple dB higher so that would appear to give me a little more of a buffer (at least when the Test Centre does a line test).
Status ATU-C Current Tx Rate
(bits/sec) ATU-R Current Tx Rate
(bits/sec)
UP 1728000 640000
DSL Statistics (accumulated at 15 minute intervals)
System
Time Tx
CRC Tx
FEC Rx
CRC Rx
FEC LOS SEF LOS
(sec) SEF
(sec) Err
(sec) Rx
(blocks) Tx
(blocks) SNR Atten.
00:01:23 0 0 0 0 0 0 0 0 0 4016 4016 15.0 55.5
Totals 0 0 0 0 0 0 0 0 0 4016 4016 N/A N/A
I'm wondering if the fact that it started raining somehow helped my connection (maybe a wet spot in the wiring but the rain moved the wetness elsewhere).
Update as of 6pm today: The Bell technician was here and said he found a slightly better pair at the OPI. He also found something rather interesting on the Bell pole at the back of my property and says that there was a "cross" on the line. He just left and said he will try his best to get my connnection routed to a stinger but he would otherwise have to send another technician from the cabling department. (LOL, funny how the first techncian concluded that there was no problem other than my supposedly defective modem). |
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Deadpool
Go Sens Go
Premium,VIP
join:2001-03-29
Canada | PM me your phone number and I can check to see what your neighbourhood looks like as well. |
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dslrocker3
join:2002-05-26
Toronto
| reply to dslrocker3
noise margin at 1728/640 has slowly crept up to 17.0 dB. I haven't been contacted by Velcom or Bell yet so I am assuming that the trouble ticket is still open. I'm hoping that the slight increase in noise margin is a sign that it is still a work in progresss. |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
1 edit | Hummm...
I wonder what Deadpool thinks about "tweaking": is it better
to optimize RCOs or SNR Margins knowing one of Bell's worker
is going to take a look?... It's one or the other, no tweak can
make them both optimized but it would mean using the ST5x6
in any case.
 |
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Deadpool
Go Sens Go
Premium,VIP
join:2001-03-29
Canada
·Bell Sympatico
| There's a GigE remote in the area that he needs to be transfered to, which Velcom has to request from Bell.
Once he's on the GigE remote his line will be able to attain 16 Mbps.
--
Disclaimer: If I express an opinion, it is my own opinion, not that of Bell or its related companies. |
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dslrocker3
join:2002-05-26
Toronto
3 edits | reply to dslrocker3
Unfortunately, I don't really think I am in a position to be asked to be transfered to that remote because I had requested a transfer to one a few months ago and was denied. They simply changed the profile from 1728/640 up to 2496/800 at that time.
The last techncian that was here also phoned me when he was still in the area and told me that the request was denied this time because an open connection wasn't available (exact wording he used was "no extra pair available"). But then again, that could be interpreted as "no extra pair available for wholesale customer". At 1728/640 interleave, rx snr 17.0 dB, I should at least be able to get my 2496/800 back (would accept 3008/640 even if they had to leave the interleaving on).
In this whole episode, I've noticed that different modems handle different lines very differently. Everyone speaks so highly of the ST516v6 but my impressions are less than spectacular. At least for my line, the SS5200 E242 is able to connect at higher speeds by a few hundred Kbps. I know that part for a fact because of how my occupancy was always pretty much 100% while I was experiencing problems. I've also noticed that with a lot of errors, the E242 is fine if interleaving is turned on but can't handle it if you are on fast path. The ST516 -at least for me- was much more stable with errors on fast path in the sense that I was able to connect and peform normal web browsing activities. In the last day the noise margin on the receiving end went from 15 to 17 dB on the E242 but did not change at all on the Speedtouch 516, remaining constant at 13.5-14.0dB. The Speedtouch 516 did however report an increase of attainable rate of about 130 Kbps from 2658 to ~2790 Kbps so I think that the two modems might actually calculate noise margin differently. |
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Bicephale
join:2005-09-24 | I'd lower my expectations from 3008/640 Kbps to 3008/512 Kbps Interleaved... |
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dslrocker3
join:2002-05-26
Toronto
| said by Bicephale :I'd lower my expectations from 3008/640 Kbps to 3008/512 Kbps Interleaved... I'd be fine with either of those. definitely better than 1728/640! |
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dslrocker3
join:2002-05-26
Toronto
4 edits | Unbelievable, Bell said that they would send someone from the cabling department. I was speaking with the techncian on the phone and he told me that he was not even from that department but that he would be at my house in a little bit. He ran some tests (remotely, didn't even come here) and told me that the line was capable of 3Mbps down and that at 1728/640, my line occupancy was at about 60% (I know that doesn't make sense but that's what he told me, 60% is just happens to be the approximate number that I reported when I re-opened the ticket). Was he even a field techncian or was he the person at the test centre?
He then said that the test centre refuses to change the profile from 1728/640 interleaved even though the current SNR is at 17.0 dB. They wouldn't even run a sync test at any higher profile just claiming that the occupancy would be above 90%. hmmmm... 3Mbps line would be over 90% when set to 2.496Mbps? That doesn't even add up! Bell refuses to even try even while leaving the interleaving turned on. They cited "stability issues" even though there were repairs done by a previously technician and the noise margin jumped by more than 10dB.
current number being reported by my modem at 1728/640:
00:01:07 0 0 0 0 0 0 0 0 0 3072 3072 17.0 55.5
What next? |
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Bicephale
join:2005-09-24
·TekSavvy Solutions..
| You're on a 1728/640 Kbps Interleaved profile,
RCO is a mere 60 % while SNR Margin is 17 dB
and Bell will send a worker to fix the wires but
won't change the profile? I'm not sure i follow.
Did i mention this horror story from Limoilou?:
»672/160 sync, center of Quebec City, Bell won't help...
 |
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dslrocker3
join:2002-05-26
Toronto
4 edits | said by Bicephale :You're on a 1728/640 Kbps Interleaved profile, RCO is a mere 60 % while SNR Margin is 17 dB and Bell will send a worker to fix the wires but won't change the profile? I'm not sure i follow. Did i mention this horror story from Limoilou?: » 672/160 sync, center of Quebec City, Bell won't help... Yes, I took a look at some of posts in that thread a while ago.
And yes, you are understanding me correctly, believe it or not. The occupancy is at 60% but they refuse to touch the profile. They "claim" that a techncian was dispatched today but he never came on site so I am even wondering if that part was a lie as well (I have no proof of this, just a gut feeling). Supposedly, work was also being done with cabling at the CO yesterday. They did perform some repairs a few days ago but if Bell leaves the profile the way it is, the repairs will have ended up accomplishing nothing. I have my doubts that the RCO is even really at 60% though. I think it might actually be lower because my ST516 says 62% at 1728 and SNR 14.0. My SS5200 says SNR 17.0 at 1728 so I have a suspicion that RCO dropped more than 2% with an increase of 3.0dB noise margin with the different modem. I thnk they might have just told me 60% because I guessed/estimated 50 to 60% for the SS5200 when I opened the ticket (think maybe they just reading the number that I reported off of the trouble ticket).
I have escalated with Velcom. Does anyone else here think I am being BSed? or should I just let it slide and move on? |
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Bicephale
join:2005-09-24 | Honestly, with cable around i wouldn't be happy with this sort of DSL service! |
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dslrocker3
join:2002-05-26
Toronto | just got an update from velcom and Bell is now saying that I once again have a defective modem. This is even after one of their techncian told me that he found the problem to be outside. |
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