Phil W Lee <(E-Mail Removed)> considered Sun, 29 Jan 2012
20:03:11 +0000 the perfect time to write:
>David Woodhouse <(E-Mail Removed)> considered Sun, 29 Jan 2012
>11:12:36 +0000 the perfect time to write:
>
>>On Sat, 2012-01-28 at 19:39 +0000, Phil W Lee wrote:
>>> It SHOULD be directly related to the synch speed according to the
>>> following table. (view in a fixed width font)
>>
>>I think they've improved this recently, haven't they? It was always
>>entirely crap that if your line synced at 1120kb/s instead of the
>>1152Kb/s that's required for a 1Mb BRAS rate, you would lost almost a
>>quarter of your capacity and be limited to 'adsl750'.
>>
>>I think they've *finally* introduced slightly better granularity so you
>>don't lose quite so much; my lines are now at 848kb/s and 1130kb/s (with
>>sync rates of 1056kb/s and 1376kb/s respectively, so even allowing for
>>the ATM overhead there's still a lot being lost to BT's substandard
>>systems; it's just a *bit* better than it was before).
>>
>>This is 20CN. I think they still have the same BRAS rate issues on on
>>21CN even though it's completely gratuitous there because they don't
>>*need* to do IP rate limiting in a separate place. Not entirely sure
>>though; I pay little attention to 21CN because there isn't even any
>>*hint* yet on when it might reach this part of the world.
>>
>Yeah, I'm stuck firmly in the world of adsl2 (20CN) rather than adsl2+
>(21CN), and now all the work is going into upgrading the lucky winners
>of the 21CN lottery (who already have decent speed) to the even higher
>speeds available with FTTC, we're being left behind again.
It looks like I'm going to have to eat my words on that one!
We've been given a date for 21CN upgrade of 2nd March 2012.
And with my synchronisation speed of 8192kbps, I should get lots of
benefit from the increase in provision from "up to 8Mbps" to "up to
20Mbps"

Even better, it's a free upgrade

)
The only worry is how to keep the household download use below the
monthly allowance. 6 internet junkies keep the wires pretty warm.
Sadly, my ancient Solwise SAR715+ router will need replacement, as it
dates from before even 8Mb DSL. It was fixed 2Mb vanilla ADSL when we
got it, and I was surprised enough that it could even manage the "up
to 8Mb" of ADSL2 - I've confirmed that no firmware upgrade can take it
up to ADSL2+ capability.
It was interesting trying to read through all the marketing crap to
find out which of the available ADSL2+ wired (I neither want nor need
wireless) routers can manage to route a /29 subnet of public IPv4
addresses, as the product information concentrates entirely on NAT
capabilities and how cuddly the web management interface is.
I'm sure most of them can do it, but it doesn't seem to be a well
supported feature.
Most of the pre-sales support people I spoke to didn't even understand
the concept of routing with anything other than NAT, with Billion and
Draytek being the honourable exceptions.
I'm sure that Cisco could have provided something suitable in
capability, but not in price.
I've settled on a Billion BiPAC 5200 RC, after confirming with the
maker that it will do what I need.