INP = Impulse noise protection AKA service profile 1 & 2 This is set by Be,and you cannot switch it off via your router, but you can ring them and ask for sp1 for INP to be switched off if you want true fastpath for online gaming in your account area of the be web site what is the profile set to currently ? is gaming mode on or off?

it maybe that when be tech support increased the target SNR value they also enabled/increased the INP too , or it although unlikely has changed automatically,

the netgear that you are using would appear to have a broadcom chipset so no need for INP set at 2 or even 1 really for some people with a similar attenuation to yours

Some further info...kitz

Edited by tommy45 (Fri 09-Sep-11 17:29:19)

In reply to a post by tommy45:

INP = Impulse noise protection AKA service profile 1 & 2 This is set by Be,and you cannot switch it off via your router, but you can ring them and ask for sp1 for INP to be switched off if you want true fastpath for online gaming in your account area of the be web site what is the profile set to currently ? is gaming mode on or off?

it maybe that when be tech support increased the target SNR value they also enabled/increased the INP too , or it although unlikely has changed automatically,

the netgear that you are using would appear to have a broadcom chipset so no need for INP set at 2 or even 1 really for some people with a similar attenuation to yours

Some further info...kitz

Gaming mode is turned off, TBH I rarely play online games anyway.
I am currently posting these problems in the BE* forums and it realy sounds like the staff dont giv a s**t there.


Ps. Thanks very much tommy45, you have been more than helpful so far

Edited by deleted (Fri 09-Sep-11 17:54:42)

In reply to a post by simonbuck:

In reply to a post by tommy45:

INP = Impulse noise protection AKA service profile 1 & 2 This is set by Be,and you cannot switch it off via your router, but you can ring them and ask for sp1 for INP to be switched off if you want true fastpath for online gaming in your account area of the be web site what is the profile set to currently ? is gaming mode on or off?

it maybe that when be tech support increased the target SNR value they also enabled/increased the INP too , or it although unlikely has changed automatically,

the netgear that you are using would appear to have a broadcom chipset so no need for INP set at 2 or even 1 really for some people with a similar attenuation to yours

Some further info...kitz

Gaming mode is turned off, TBH I rarely play online games anyway.
I am currently posting these problems in the BE* forums and it realy sounds like the staff dont giv a s**t there.


Ps. Thanks very much tommy45, you have been more than helpful so far

well if you don't use your connection for online games or other latency sensitive applications then your ideal line config would be service profile 1 =INP-1 with the interleave depth and delay as low as is possible , and of course the target SNRM set to 6db or 3db ( with a fault free line)

Edited by tommy45 (Fri 09-Sep-11 18:11:29)

In reply to a post by simonbuck:

In laymans terms what is an interleaving depth of 96

Each packet of data is split over 64 packets for transmission, and reassembled by the modem. That's why latency is higher on interleaved compared to fast path.

Your upstream is depth 1, which is fast path, as the data packet is split into 1, so to speak.

Netgears always (incorrectly) report just the upstream, as in "Channel: Fast".

Kitz has this good explanation of interleaving.

Edited by RobertoS (Fri 09-Sep-11 18:12:15)

Down sync is low (54% of the theoretical maximum).
You are on ADSL2+
SNR is good.
Attenuation looks normal.
Output power looks normal.
There are lots of error seconds (downstream).
There are Lots of FEC errors.
There are a few uncorrected FEC errors.

In a nutshell, you are getting far too many errors, which is probably keeping your Sync down from an expected 15 Meg.

Hi Guys, So I work for an ISP... and we work closely with BE.

So what I have gathered is that your connection is dropping sync and your speeds have dropped 6meg from 16 to 10. You're connection was not stable wile synced at the slower 10 meg and BE could not find a fault with the line itself.

This to me means a few things, first is that their line tests did not detect a fault, this does not mean there isn't one. They have dropped your sync speeds to what seems to be ADSL+ with a max of 8meg. This is considered a stable profile and is ususally used to stabilise troubled connection where the issue is not always obvious. This should give you a stable connection wile they monitor the line, the line monitoring (usually 24 hours) detects any layer 1 issues. noise on the line in particular frequenceys etc.

Moving forward I would suggest you work with BE to rule out any possible hardware issue, you have already performed the quiet line test which was clear, and you have an alternative router so you could try that and put a new filter and DSL cable on the line too. If you do this then you have proved CPE is clear of faults and BE can justify a special faults investigator to investigate your line. IF BE are monitoring the connection then it is counterproductive to disconnect anything or change the router at this point as this is void the monitoring results, so disscuss this with BE before you go ahead with the hardware swap.

Also remember if BE cannot find a fault and they send an engineer out without checking equiptment or investigating other options first Openreach may well charge them over £450 + VAT just for wasting their time.
I'm not saying your issue shouldn't be fixed, i'm just saying that there are diognostic procedures that need to be followed to rule out particular issues before a SFI is sent out. Remember if the SFI finds that something on the end users prommisis is causing the issues such as a faulty router of something as simple as a doggy filter (and yes hardware can fail including 2grand Cisco's) depending on your contract you might be liable for the OP charge.

I guess my point here is I cannot see any of BE diognostics so have no real idea what could be the issue at this point, it could be a number of things from a BT line fault to a hardware issue with CPE or even some kind of outside interference. But what I can tell you is that a SFI engineer with not fix everything and sometimes they just do nothing in my experience, its better to collect the data rule out any potential onsite issues and move on from there.

In response to FAST PATH and INP2 / 1 or even NO INP, well each and every scenario is different. Some router chipsets just don't work well with INP2 (only ever normally very old chipsets) and some (mostly new routers) prefer INP2. Also you must consider the line length of the PSTN line you are running your broadband over and its copper quality. All of these factors play a big part of the type of speeds you achieve and stability of the connection. A stable connection is always much better than a fast one that continuously drops out and it is always a trade off with speed a stability. So if you have a stable connection, it could be worth requesting your ISP trys to find the best configuration for your line. Also worth noting this is done manually with BE services but automatically with BT services.

I hope this has helped.

Sal

In reply to a post by RobertoS:

How long between the two sets of stats?

23 mins.

In reply to a post by RobertoS:

(It's a pity you cut the final time analysis off the first).

You don't need it; the AS counts measure Uptime (somehow)

In reply to a post by tommy45:

Well i have highlighted 2 factors that certainly ain't gonna help you get a higher sync rate INP inpulse noise protection is enabled on on the downstream and set to 2.24 and presumably also on fastpath too ? who set the INP to it's current value, or was it set like like before you had these issues?

Wrong, it's interleaved. INP is Impulse Noise Protection, another form of interleaving too.

From personal experience that setting is the default setting used by be, on interleave, if they set it at 1 or even disabled it your sync will increase that is almost certain,, on my line with inp set to 2 sync rate is lowest if set to 1, it gives a slightly higher rate than when on fast path & inp disabled ?? also there is very little bitswapping happening with the upstream, it ideally should be somewhere near the same as the downsteam

The bitswapping occurs when there is a lot of noise interference on the line - no wonder you have experience of it!

In reply to a post by XRaySpeX:

In reply to a post by RobertoS:

How long between the two sets of stats?

23 mins.

In reply to a post by RobertoS:

(It's a pity you cut the final time analysis off the first).

You don't need it; the AS counts measure Uptime (somehow)

Neat! Thanks .

Low and behold, as expected no telephone call from BE* as promised by 7pm. infact its now 9pm, speed still the same.

To be frank, Ive lost all faith 0% customer service


So I phoned them to be told they would like to send me a new router out in the post so that they can do another 24hr test to see how that performs.

Luckily enough Ive got a brand new bebox in the cupboard that is still sealed in the packaging, so I told them not to bother as im going to plug that in now an see where we go from here. (another new microfilter and cable also)

Promised another call by 12 noon tommorrow (we will see)

apparently they have had problems with outgoing calls this evening hence they havnt rang me (yeah right) they must think I came down the river on a piece of toast.


back to square one

Bebox stats as requested looks worse than the netgear

Uptime:
0 days, 0:43:33
DSL Type:
G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]:
1,338 / 8,024
Data Transferred (Sent/Received) [kB/kB]:
0.00 / 0.00
Output Power (Up/Down) [dBm]:
12.0 / 18.5
Line Attenuation (Up/Down) [dB]:
14.0 / 29.5
SN Margin (Up/Down) [dB]:
7.0 / 7.0
Vendor ID (Local/Remote):
TMMB / BDCM
Loss of Framing (Local/Remote):
35 / 0
Loss of Signal (Local/Remote):
3 / 0
Loss of Power (Local/Remote):
0 / 0
Loss of Link (Remote):
0
Error Seconds (Local/Remote):
40 / 0
FEC Errors (Up/Down):
3 / 2,421,525
CRC Errors (Up/Down):
3 / 0
HEC Errors (Up/Down):
0 / 0