Kitz Forum
Broadband Related => FTTC and FTTP Issues => Topic started by: William Grimsley on July 09, 2016, 08:18:05 AM
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Hello everyone,
So, I couldn't resist, I performed a manual power down and power up on my router this morning.
Before I performed the action, the line stats showed the Downstream Attainable Rate to be around 44000 Kbps, so I performed the above, however when the line synced, the Downstream Data Rate was slightly lower. Obviously, I was a bit annoyed but also confused. Why is the Downstream Attainable Rate figure so innacurate? Is it to do with interleaving being applied as well as G.INP?
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What difference would a couple of extra Mbps make to you anyway?
If it ain't broke, don't fix it?
If you want to have a line fault, why not just simulate the experience by switching off your modem for a week, then switch it back on and pretend it's been fixed.
Regarding the max attainable rate figure, as I've said before, it was originally loosely defined in G.993.2, leaving quite a lot of the calculation up to the manufacturer, and so the max attainable rate figure can be calculated using difference parameters (such as different amounts of FEC and interleaving) than what the line will actually end up using.
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Eh?
I don't want to simulate a line fault? Where did you get that from? I wanted my line to sync at the highest it could, and seen as it wasn't at the time (looked like it wasn't), I performed the above.
Thanks for your explanation, I thought it might be that. :)
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I always look for the peak ds snrm time and do it then. Due to engineers visit yesterday I lost 2mb down but will monitor the line for a few days and look for the peak opportunity unless the pcr engineer actually fixs the supposed fault and it might go up again by itself...
worth noting even though catching it at peak time it doesnt always work out as dlm has reduced my ds rate if too many errors are generated at some point..
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Yeah, my Downstream SNR Margin was at 6.6 dB so thought it was at peak, my line must be reducing in quality...
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Did you do an immediate sync or did you wait. I guess if you waited it may have dropped.. all down to a bit of good luck ;)
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@William Grimsley,
what router are you using? HHB5?
My HHB5 max Rate is 5.3Mb but my Billion 8800NL Max Rate is 11Mb+
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I don't want to simulate a line fault? Where did you get that from?
Some people seem to spend so much time looking for a fault, it's as if they actually want to have a fault.
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I waited until the Downstream Attainable Rate was stable then did it.
I am using my Billion BiPAC 8800NL.
Oh, so I'm one of those people am I? No.
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Some people seem to spend so much time looking for a fault, it's as if they actually want to have a fault.
Ha ha .......... the same thought has run through my mind on more than one occasion. ;D
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I must admit that I always ignore the attainable rate. All I'm interested in is the actual rate my router syncs at and the SNRM which is obtained and of course how stable it is. Attainable rate is about as much use as a chocolate teapot IMHO as there are quite a number of ways different routers calculate it.
Stuart
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Fair play, always best to power down and power up the router once in a while anyway.
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@skyeci,
what's "Merlin" you have noted on your posts footprint?
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It's a modified firmware for the ASUS
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@Dray,
I've seen people talk about Huawei unlocked firmware.
These routers need unlocked firmware or they cannot be used by DSLStats?
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Yes that's right. As originally supplied by Openreach the Huawei HG612 is configured as a bridge (modem) and locked down.
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@Dray,
I've seen people talk about Huawei unlocked firmware.
These routers need unlocked firmware or they cannot be used by DSLStats?
Merlin only runs on Asus routers, not the combined modem routers that Asus brought out. The likes of Dslstats only run on modems.
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Strange the manufacturers would lock the modems in the first place - surely they would want people to be able to view the statistics
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Strange the manufacturers would lock the modems in the first place - surely they would want people to be able to view the statistics
@skyeci,
what's "Merlin" you have noted on your posts footprint?
I use merlin firmware on the asus router as I am on sky. If I didnt the router would not authenticate properly with skys dhcp servers...merlin has the options required.
The zyxel needs no changes and I use it in bridge modem mode. Hg612 stats works a treat with it to upload to mydslwebstats..
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No, they don't. That's why all the BT routers are locked down.
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@William Grimsley,
I can understand why BT don't want people to see the statistics on their HHB's - because they'll be able to see for definite if their line needs replaced & that costs BT money
But if I buy a router or modem from a manufacturer I expect them to give me all the options & info they can cos I'm paying them
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And on the other hand, you'll get people worrying about every few CRC errors or whenever the SNRM goes up or down, or that their current line rate is lower than the attainable rate that's showing.
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The HG612 is an Openreach product, so that's why it's locked down. My perfect setup would be if the BT Home Hub 3 had a VDSL modem in it, I loved the interface and the look of it (I still have one next to me but unfortunately when I was looking at the motherboard I accidentally scratched it and it won't power on)...
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@ejs,
I'm a bag of nerves when I see CRC's! It could mean the beginning of no internet connection for me :no:
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@ejs,
I'm a bag of nerves when I see CRC's! It could mean the beginning of no internet connection for me :no:
CRC's actually give me excitement, thinking "Hell yes, here goes the connection! Woop!" LOL.
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@William Grimsley,
I've had barely any CRC's today, hopefully it's fixed now. But I think I'll always have to constantly monitor my line until FTTP is rolled out
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My listening pleasure has been immensely enhanced since installing oscilloscopes on top of each speaker cabinet. ;)
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I hope that pleasure isn't dirty. :P
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Whoooosh
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My listening pleasure has been immensely enhanced since installing oscilloscopes on top of each speaker cabinet. ;)
:lol:
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Hello everyone,
So, I couldn't resist, I performed a manual power down and power up on my router this morning.
Before I performed the action, the line stats showed the Downstream Attainable Rate to be around 44000 Kbps, so I performed the above, however when the line synced, the Downstream Data Rate was slightly lower. Obviously, I was a bit annoyed but also confused. Why is the Downstream Attainable Rate figure so innacurate? Is it to do with interleaving being applied as well as G.INP?
I manually power down/power up my modem once a day at least, as I like to turn off electronic devices when I'm not at home or asleep. My line always sync's within ±5% of my average sync rate. It's nothing to be afraid of doing, since there are many people who do turn off these modems at night, so DLM accounts for it.
You'll only run into problems if you restart your modem several times within a certain time period. Once or even twice per 24h is perfectly fine.