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uk.telecom.broadband (UK broadband) (uk.telecom.broadband) Discussion of broadband services, technology and equipment as provided in the UK. Discussions of specific services based on ADSL, cable modems or other broadband technology are also on-topic. Advertising is not allowed.

Changes to BT BRAS rates



 
 
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  #1  
Old December 13th 11, 10:51 AM posted to uk.telecom.broadband
River Tarnell
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Posts: 28
Default Changes to BT BRAS rates

The ISP Andrews & Arnold just posted this status message regarding the
way BT handle BRAS rates:



In short, rather than arbitrarily restricting the download speed of ADSL
lines (sometimes losing up to 1Mbps compared to the sync speed), the
download speed will be the same as the sync speed, and won't take days
to fix itself after the sync speed changes (at least for 21CN lines).

A rare example of BT actually getting something right?

--
-- river. | Free Usenet: http://news.rt.uk.eu.org/
Non-Reciprocal Laws of Expectations: | PGP: 2B9CE6F2
Negative expectations yield negative results.
Positive expectations yield negative results.
  #2  
Old December 13th 11, 11:03 AM posted to uk.telecom.broadband
WCZ
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Posts: 30
Default Changes to BT BRAS rates


"River Tarnell" wrote in message
...
The ISP Andrews & Arnold just posted this status message regarding the
way BT handle BRAS rates:



In short, rather than arbitrarily restricting the download speed of ADSL
lines (sometimes losing up to 1Mbps compared to the sync speed), the
download speed will be the same as the sync speed, and won't take days
to fix itself after the sync speed changes (at least for 21CN lines).

A rare example of BT actually getting something right?


BE\O2 have been doing this for years and it's taken till now for BT to
cotton on that it's a better solution than there stupid BRAS profiles.

As I'll be going back to BT soon due to no O2 kit in the new exchange I'm
quite pleased to see this change. The odd low sync event will no longer
bugger up download speeds!

--

WCZ



  #3  
Old December 13th 11, 12:30 PM posted to uk.telecom.broadband
The Natural Philosopher
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Posts: 2,728
Default Changes to BT BRAS rates

River Tarnell wrote:
The ISP Andrews & Arnold just posted this status message regarding the
way BT handle BRAS rates:



In short, rather than arbitrarily restricting the download speed of ADSL
lines (sometimes losing up to 1Mbps compared to the sync speed), the
download speed will be the same as the sync speed, and won't take days
to fix itself after the sync speed changes (at least for 21CN lines).

A rare example of BT actually getting something right?

Sad its ONLY 21CN...as I am fairly sure my exchange is still firmly in
the 20th, if not the 19th century..

  #4  
Old December 13th 11, 01:30 PM posted to uk.telecom.broadband
Tired
external usenet poster
 
Posts: 43
Default Changes to BT BRAS rates

River Tarnell wrote:
The ISP Andrews & Arnold just posted this status message regarding the
way BT handle BRAS rates:



In short, rather than arbitrarily restricting the download speed of
ADSL lines (sometimes losing up to 1Mbps compared to the sync speed),
the download speed will be the same as the sync speed, and won't take
days to fix itself after the sync speed changes (at least for 21CN
lines).

A rare example of BT actually getting something right?


And the way that llu companies like Sky have been operating like for at
least four years.

"BT, never knowingly innovated."


  #5  
Old December 13th 11, 06:54 PM posted to uk.telecom.broadband
River Tarnell
external usenet poster
 
Posts: 28
Default Changes to BT BRAS rates

In article ,
The Natural Philosopher wrote:
River Tarnell wrote:
In short, rather than arbitrarily restricting the download speed of ADSL
lines (sometimes losing up to 1Mbps compared to the sync speed), the
download speed will be the same as the sync speed, and won't take days
to fix itself after the sync speed changes (at least for 21CN lines).

Sad its ONLY 21CN...as I am fairly sure my exchange is still firmly in
the 20th, if not the 19th century..


My understanding is that the 20CN kit has a limited number of possible
profiles, so a small set of BRAS rates (and SNR, etc.) has to serve all
users. Presumably whatever the new 21CN kit is doesn't have this
restriction, allowing it to be set per-user.

--
-- river. | Free Usenet: http://news.rt.uk.eu.org/
Non-Reciprocal Laws of Expectations: | PGP: 2B9CE6F2
Negative expectations yield negative results.
Positive expectations yield negative results.
  #6  
Old December 13th 11, 09:59 PM posted to uk.telecom.broadband
alexd
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Posts: 1,765
Default Changes to BT BRAS rates

River Tarnell (for it is he) wrote:

In short, rather than arbitrarily restricting the download speed of ADSL
lines (sometimes losing up to 1Mbps compared to the sync speed), the
download speed will be the same as the sync speed,


A rare example of BT actually getting something right?


Wasn't the point of the BRAS profile to have stuff queueing/discarded at the
IP layer rather than at the ATM layer? Given that the DSL overheads account
for about 15%, the sync speed is always going to be higher than the maximum
IP throughput you'll ever get, and so in theory the new rate limit will
never apply. I suppose they've decided that whatever the BRAS profile was
intended to do, it's not worth the administrative overhead.

--
http://ale.cx/ (AIM:troffasky) )
21:54:31 up 24 days, 4:55, 5 users, load average: 0.06, 0.09, 0.13
"People believe any quote they read on the internet
if it fits their preconceived notions." - Martin Luther King

  #7  
Old December 14th 11, 12:16 AM posted to uk.telecom.broadband
The Natural Philosopher
external usenet poster
 
Posts: 2,728
Default Changes to BT BRAS rates

alexd wrote:
River Tarnell (for it is he) wrote:

In short, rather than arbitrarily restricting the download speed of ADSL
lines (sometimes losing up to 1Mbps compared to the sync speed), the
download speed will be the same as the sync speed,


A rare example of BT actually getting something right?


Wasn't the point of the BRAS profile to have stuff queueing/discarded at the
IP layer rather than at the ATM layer?


neither: the DSLAMS had little or no buffering so it forced the queue up
to the ATM and IP levels.

Given that the DSL overheads account
for about 15%, the sync speed is always going to be higher than the maximum
IP throughput you'll ever get, and so in theory the new rate limit will
never apply. I suppose they've decided that whatever the BRAS profile was
intended to do, it's not worth the administrative overhead.


I suspect they will subtract the overheads.

  #8  
Old December 14th 11, 11:26 AM posted to uk.telecom.broadband
Gaius
external usenet poster
 
Posts: 91
Default Changes to BT BRAS rates

To quote from something somebody has found on Zen's support pages :

"Speed profiles for 21CN customers are automatically set to 88% of your
current synchronisation speed immediately".

It looks like this sneaked out from BT Wholesale rather quietly.....

  #9  
Old December 14th 11, 09:04 PM posted to uk.telecom.broadband
alexd
external usenet poster
 
Posts: 1,765
Default Changes to BT BRAS rates

Gaius (for it is he) wrote:

"Speed profiles for 21CN customers are automatically set to 88% of your
current synchronisation speed immediately".


OK, that makes a bit more sense then.

--
http://ale.cx/ (AIM:troffasky) )
21:03:51 up 25 days, 4:04, 5 users, load average: 0.08, 0.08, 0.12
"People believe any quote they read on the internet
if it fits their preconceived notions." - Martin Luther King

 




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