Quote:
Originally Posted by Chrysalis
remember on xDSL you have overheads included so you wont get 80mbit throughput on a 80mbit sync. 72mbit seems about right as I think its about 10%. VM is unusual against the trend that they add fluff on top to counter overheads.
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That's ADSL, not VDSL.
On VDSL 80Mbit "sync" is PTM 80Mbit data rate (basically, equiv. Ethernet rate)
BT further caps this down to 77.32Mbit via their IP profile, Sky do not so you can get 79+
The most you'll get (minus IP overheads, i.e. in a crappy flash-based webapp) in a speedtest is about 75.5-76.0Mb on BT (hence why it's marketed as "Up to 76Mb"), and about 78-79Mb on Sky.
---------- Post added at 16:45 ---------- Previous post was at 16:41 ----------
Quote:
Originally Posted by Chrysalis
looks like an interleaving bump.
DLM seems very pro interleaving on VDSL  seen so many graphs with it on.
But also if you were swapping router/rebooting it etc. then that would make it more likely. |
I don't see what happened at 5am, how much did it go up by?
I've seen quite a few lines with interleaving and INP in one direction only, and it doesn't directly correlate with length of line or SNR. For example I've had no interleaving on my line for 6 months (except when I was messing with the cabling), and I have ~8.5dB SNRM and my line is running at 90% capacity. One of my friends has 8ms DS interleaving despite having a 3x shorter line, 25dB SNRM, and only running at 55% capacity.