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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.

BT HH4 speed issue

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Old February 21st 18, 04:58 PM posted to uk.telecom.broadband
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Posts: 702
Default BT HH4 speed issue

"Graham J" wrote in message
Woody wrote:

That is a bit of an odd combination. If the SNR is so bad as to
support a 1.6Mb sync rate why is the upload speed not pegged at
And more than that why is it still on FASTPATH with sub 20ms

It would almost certainly benefit from interleaving error
on and the upload speed dropping. Resynching at a time of day
radio interference is strongest will force a slightly more robust
connection. My ping is about 40ms due to interleaving being on.

It would be worth trying the bellwire hack on the slower lines to
see if it will help improve rejection of RF noise. It gained me
+50%. YMMV


The 19mS ping was yesterday when running at 1.6Mb but I have seen
pings of 180mS or more and many commonly in the 30-80mS range.

Not quite sure what the bellwire hack is and as there is no phone
the line what effect can the hack have?

Interleaving error correction on: where do I find that in a HH4?


Interleaving is controlled from the exchange equipment and can be
configured by the ISP. This is why you need to work with an ISP
that understands the issue.

Ping is probably not a good indication of circuit quality; sync
rate, SNR margin, and loop attenuation for both upstream and
downstream directions are a better guide.

Long term monitoring of these parameters is worthwhile. The SNR
margin may vary a couple of dB day to night and the downstream sync
speed may adapt accordingly. The loop attenuation should not vary
(although the router's measuring ability may show a dB variation
with time).

The upstream sync rate is limited by the service type (ADSL, ADSL2,
ADSL2+, etc.) and by configuration of the exchange equipment. A
good ISP can tell you what it should be, and adjust it if necesary.
Some users would prefer to get more download speed (perhaps another
500kbits/sec) by reducing upload speed from 1400k to 832k to 448k
depending on the service type.


Those words keep coming up - a 'good ISP' - but what can you do apart
from chage provider if your ISP is BT?


harrogate3 at ntlworld dot com

Old February 21st 18, 06:14 PM posted to uk.telecom.broadband
Graham J[_2_]
external usenet poster
Posts: 723
Default BT HH4 speed issue

Woody wrote:


Those words keep coming up - a 'good ISP' - but what can you do apart
from change provider if your ISP is BT?

Endure hours of frustration on the phone to their "support" people,
which ultimately may well achieve nothing useful.

Easier not to get involved ....

Graham J


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