General Discussion
  >> Which ISP? (Residential)


Register (or login) on our website and you will not see this ad.


  Print Thread
Standard User gromit69
(member) Fri 25-Sep-15 15:56:23
Print Post

Annex M


[link to this post]
 
Does anyone do Annex-M any more?
I checked with Zen yesterday and apparently they've stopped doing it frown
Standard User vivaciti
(knowledge is power) Fri 25-Sep-15 16:35:55
Print Post

Re: Annex M


[re: gromit69] [link to this post]
 
We can still do Annex M

www.vivaciti.net
Vivaciti Broadband
0800 0911797

Forum
Facebook
Standard User uno
(knowledge is power) Fri 25-Sep-15 21:06:20
Print Post

Re: Annex M


[re: gromit69] [link to this post]
 
Loads that still do.

AAISP, IDNet, Talk Talk Business and Plusnet to name a few.

Matt

uno Communications
t: 0800 520 0345
Official Maidenhead, Milton Keynes & Sheffield Speedtest.net Host


Register (or login) on our website and you will not see this ad.

Standard User jelv
(knowledge is power) Sat 26-Sep-15 08:54:58
Print Post

Re: Annex M


[re: uno] [link to this post]
 
Annex M is not available on Plusnet residential accounts.

jelv

Plusnet user since November 2001
Standard User richi
(newbie) Sat 26-Sep-15 10:39:43
Print Post

Re: Annex M


[re: gromit69] [link to this post]
 
The thing is, Annex-M has become an anachronism in most locations. It was only ever worth it on shorter lines -- the very lines that now get far better performance with FTTC/VDSL.

The problem is that the upper half of the frequency band for the Annex-M uplink is used for downlink on everyone else's lines. So crosstalk is a huge problem on longer lines. While bins 7-31 and 64-96 perform strongly, bins 32-63 can support surprisingly few bits, due to crosstalk.

I'm on a 3 km line, where FTTC won't do much for me. I migrated from Plusnet 20CN (Pro) to Pulse8 a couple of months back and have been struggling with this very issue (wholesale TalkTalk Business). To its credit, Pulse8 actually volunteered to downgrade me to Annex-A, because I wasn't getting value for money. I've not taken them up on the offer (yet), but I estimate I'll lose ~300 Kbps up, but gain ~1500 Kbps down.
Standard User richi
(newbie) Tue 29-Sep-15 08:48:02
Print Post

Re: Annex M


[re: richi] [link to this post]
 
Wasn't thinking straight when I wrote 1,500 Kb/s -- I meant 1,000 Kb/s.

And after the downgrade, I've gone from 12.1/1.3 to 13.0/1.0 -- on a 3 km line with 38 dB attenuation, I don't think I'm going to get much better with FTTC, do you?
Standard User ian72
(eat-sleep-adslguide) Tue 29-Sep-15 09:10:11
Print Post

Re: Annex M


[re: richi] [link to this post]
 
How far away is your cabinet from you? FTTC is dependent on cabinet distance rather than exchange. My cab is around 600m away (by actual cable run) and I get about 45Mb/s on FTTC. Do you know where your cab is?
Standard User richi
(newbie) Wed 30-Sep-15 08:14:06
Print Post

Re: Annex M


[re: ian72] [link to this post]
 
Heh, yeah forgot to mention that my cab is right outside the exchange. So still 3 km (length confirmed by an SFI engineer, BTW).
  Print Thread

Jump to