Annex M - any update on availability for residential custs?
Hi folks,
I have a specific issue with my line. After my exchange was recently 21CN'd I'm now on ADSL2+ with uncapped upload. At most times of the day I can sync at 11Mbps down, 950kbps up. My up attenuation is low (14dB), down isn't bad either (37dB), and all is good.
However, at certain times of the day my upstream sync can drop as low as 300kbps, with SNR dropping down to sub 2dBs.
Using DMT I can see that there's clearly some interference/crosstalk being induced on my line at the low-end frequencies (circa 100-170kHz) killing those upstream bins/channels. Maybe a local business fires up some machinery, arc welding equipment or something. Or maybe I have some ISDN lines or something funky bundled along with my line leading to crosstalk.. I really don't know, and I doubt I'd ever have a case to get it investigated properly.
That said, I frankly don't care whether I get 9Mbps or 11Mbps downstream, and would happily sacrifice some of my downstream channels for improved upstream performance. Which leads me to..... Annex M.
Annex M would appear to offer just the solution I need. I searched the forums and there was mention back in Sept 11 that PlusNet are considering introducing it as an option for residential subscribers. Is there any update on that? Or would you like a beta tester? 'Cos right now I have a great use case for it.
I have a specific issue with my line. After my exchange was recently 21CN'd I'm now on ADSL2+ with uncapped upload. At most times of the day I can sync at 11Mbps down, 950kbps up. My up attenuation is low (14dB), down isn't bad either (37dB), and all is good.
However, at certain times of the day my upstream sync can drop as low as 300kbps, with SNR dropping down to sub 2dBs.
Using DMT I can see that there's clearly some interference/crosstalk being induced on my line at the low-end frequencies (circa 100-170kHz) killing those upstream bins/channels. Maybe a local business fires up some machinery, arc welding equipment or something. Or maybe I have some ISDN lines or something funky bundled along with my line leading to crosstalk.. I really don't know, and I doubt I'd ever have a case to get it investigated properly.
That said, I frankly don't care whether I get 9Mbps or 11Mbps downstream, and would happily sacrifice some of my downstream channels for improved upstream performance. Which leads me to..... Annex M.
Annex M would appear to offer just the solution I need. I searched the forums and there was mention back in Sept 11 that PlusNet are considering introducing it as an option for residential subscribers. Is there any update on that? Or would you like a beta tester? 'Cos right now I have a great use case for it.
Line now ADSL2+ uncapped. Upstream sync at 886K and speedtest.net reports 700K upload speed. No loss of downstream speed. Well pleased 