HiVolt
30
Premium
join:2000-12-28
Toronto, ON
clubs:
 ·TekSavvy Solutions..
·Bell Sympatico
| reply to risendevil
Re: VDSL and fastpath/interleave
So it appears that VDSL on interleave is around 30ms hop, a 20ms on average improvement on G.DMT ADSL. Not bad.
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risendevil
join:2002-12-23
Ottawa, ON
| said by HiVolt  :So it appears that VDSL on interleave is around 30ms hop, a 20ms on average improvement on G.DMT ADSL. Not bad. I think though the comparison isn't entirely fair...
VDSL doesn't sound like it would work well past 1000 meters (I'm picking a number, not anything official) while the other can work at what, 5km?
Actually, I'm not 100% what my line of thinking and my point are, so I'll stop now...
Main thing I got is they put us unnecessarily on interleave and most of the tech guys who were readily available had no clue that it was something that could be turned on or off... As far as they were concerned... It just was "30ms, that's the way it is."
To be fair, its probably not something they had to deal with yet in their young history. |
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crimsondr
join:2005-03-14 | ok i am lost. does this mean u are still using VDSL high speed and getting low pings? or did you switch to regular ADSL on fastpath? |
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risendevil
join:2002-12-23
Ottawa, ON
| Sorry for the confusion.
Yes, after a week, someone in the know realized that my VDSL was interleaved, and flipped a switch, lowering my pings to what I expected beforehand.
I did not have to pursue being put back on the regular adsl platform, although I do entertain thoughts that had I not hassled them about switching me over, the problem might not have gotten solved this cleanly so... quickly. |
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STN
join:2004-12-29
Canada | reply to risendevil
No, VDSL and ADSL cannot be combined on the same pair. They use similar frequencies for transmission, not identical, but they overlap alot.
I'm just checking if VDSL has an 'interleave' and 'fast-path' option. I haven't worked with it much. |
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STN
join:2004-12-29
Canada
·Bell Sympatico
| reply to risendevil
VDSL physical layer provides support for dual latency channels commonly referred to as the fast and interleaved channels. The "fast" channel has a low latency (typically 2ms), but a higher Bit Error Rate (BER) that can be caused by impulse noise in comparison to a "interleaved" channel. In contrast the "interleaved" channel has a higher latency (typically tens of milliseconds) and a lower BER that can be caused by impulse noise. This is due to the fact that the interleaved channel provides support for interleaving across blocks and forward error correction of the payload.
Voice - Fast channel preferred.
Channel Change - Fast channel preferred.
Video on Demand - Interleaved channel preferred.
Broadcast TV - Interleaved channel preferred.
Data - Either channel is suitable.
Gaming - Neither channel is ideally suitable. A trade off must be made as to whether delay or bit error rate is the more significant factor.
They probably set ExpressVu For Condos to interleave by default because of the B-TV and VoD apps. |
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polska123
@sympatico.ca
| reply to risendevil
So u are one VDSL So tell us what modem u are using
VDSL Is different because there is fiber's running to the premises there is only coper in the building anything outside of the building going to Co is fiber. I don't even think u have VDSL. So if u do have VDSL I should be getting maxx speed or which ever service u have ithere hi-speed or ultra. |
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Doci
Toothless Fairy
join:2003-02-01
·Bell Sympatico
1 edit | People like to think a lot w/o having any fuckin knowledge of the subject at hand. He doesn't get full speed because most of the bandwidth is taken by the TVs. The more tvs you have on at a time, the lower your available bandwidth for internet. And it is most likely ADSL2+
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Indebted to Hitler for my freedom. Heil Hitler |
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Doci
Toothless Fairy
join:2003-02-01 | reply to risendevil
What is your STB called? RG2200A or RG2200V? Should have the model # on the bottom. A = ADSL, V = VDSL.
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Indebted to Hitler for my freedom. Heil Hitler |
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crimsondr
join:2005-03-14
| reply to risendevil
i ordered express vu for condos with internet just recently. the express vu install isn't until later this week. but i've already received a sympatico starter kit in the mail with a modem. i plug the modem in and it works! full internet access. i'm not sure why they sent me a modem because the lady told me that the expressvu box would do it all. will these two devices be able to coexist on the same line? |
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Doci
Toothless Fairy
join:2003-02-01
·Bell Sympatico
| said by crimsondr :will these two devices be able to coexist on the same line? No, remember, the STB also has a built in modem.
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Indebted to Hitler for my freedom. Heil Hitler |
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Glen1
These Are The Good Ol' Days.
Premium,MVM
join:2002-05-24
GTA Canada
·Bell Sympatico
| reply to risendevil
The 6300 modem hooks up to the expressvu/vdsl box via the Wan port. There is a special option when you go through the install wizard picturing the two devices working together...allowing you to have a wireless device available for your Lan while the expressvu is handled by the other device. |
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risendevil
join:2002-12-23
Ottawa, ON | reply to Doci
umm...
Next Level Communications
Model #: 220G30000
0?
U?
V?
That third character looks wierd on mine. Sorry. |
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Doci
Toothless Fairy
join:2003-02-01 | Is that all it says? No RG2200x anywhere? |
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risendevil
join:2002-12-23
Ottawa, ON | Just checked something and I didn't really copy it properly. My bad.
2200N30000
no RG, and the 0 before the N is kinda scuffed out a bit, but I'm pretty sure it's a 0. |
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crimsondr
join:2005-03-14 | reply to risendevil
does bell always send u a regular adsl modem even when u have vdsl and do not need both devices? |
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risendevil
join:2002-12-23
Ottawa, ON | I didn't get one; or rather, I returned the Speedstream 5200 I had from my HSE service before. |
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Doci
Toothless Fairy
join:2003-02-01 | I don't know what format that one is using. According to Motorola literature, they only have A/V models where they represent powered by ADSL/VDSL respectively.
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Indebted to Hitler for my freedom. Heil Hitler |
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Tikker_LoS
join:2004-04-29
Regina, SK
·SaskTel Saskatchewan
| reply to MacGyver
said by MacGyver :The first hop with interleave is at least 50ms, fastpath is 10ms or lower. I've never seen a first hop in the 30's before; perhaps you are right and this is something specific to VDSL with TV. the interleave value can be set anywhere from 2ms to 60+ ms
So saying that you've never seen something in the 30's doesn't mean a lot =P
I know at SaskTel, for their TV over DSL overing, they set the interleave to 6ms, just to help with error correction (less pixelization when viewing) |
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