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[William Grimsley]

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?

[ejs]

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.

[William Grimsley]

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.

[skyeci]

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..

[William Grimsley]

Yeah, my Downstream SNR Margin was at 6.6 dB so thought it was at peak, my line must be reducing in quality...

[skyeci]

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 

[MaximusPrime]

@William Grimsley,

what router are you using? HHB5?

My HHB5 max Rate is 5.3Mb but my Billion 8800NL Max Rate is 11Mb+

[ejs]

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.

[William Grimsley]

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.

[Black Sheep]

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. 

[broadstairs]

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

[William Grimsley]

Fair play, always best to power down and power up the router once in a while anyway.

[MaximusPrime]

@skyeci,

what's "Merlin" you have noted on your posts footprint?

[Dray]

It's a modified firmware for the ASUS

[MaximusPrime]

@Dray,

I've seen people talk about Huawei unlocked firmware.

These routers need unlocked firmware or they cannot be used by DSLStats?