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[jid]

Latest graph, SNR has dropped from 12 to 7.5, sync still 6560kbps...

[kitz]

Have you tried the "radio trick" mentioned REIN faults

[jid]

Yep have tried the radio, couldn't really hear anything obvious?

I had to resync earlier due to high fec errors, resynced at 5600 with 13 SNR at the moment.

Regards

Jamie

[jid]

Well,

Gap3 906kHz-914kHz (Tone210-Tone211)

is a Radio Broadcast.

There is a distinct noise at

Gap2 875kHz-897kHz (Tone203-Tone207)

as well.

[b4dger]

Its funny, as the SNR issues have now gone with the new Router? (Broadcom Chipset)

Glad to see things are improving for you
I also saw a massive improvement switching to a Speedtouch 585 also with a Broadcom chipset. A different world from my previous Netgear with an AR7 chipset...

[kitz]

Well,

Gap3 906kHz-914kHz (Tone210-Tone211)

is a Radio Broadcast.

There is a distinct noise at

Gap2 875kHz-897kHz (Tone203-Tone207)

as well.

I'd classed those gaps all in about the same range...  from the first screen cap the gaps werent actually reported but they were visible on the graphs - hence why I said  at around 862 kHz.
The 2nd DMT cap actually lists the tones and the frequencies which are being blocked.

Your router wont use any bins where the SNR (not the same as SNRM) is below 6dB due to too much noise (interference) on that particular channel  and "shuts them off".

[jid]

Its funny, as the SNR issues have now gone with the new Router? (Broadcom Chipset)

Glad to see things are improving for you
I also saw a massive improvement switching to a Speedtouch 585 also with a Broadcom chipset. A different world from my previous Netgear with an AR7 chipset...

Hi b4dger,

My previous D Link had the AR7 as well, I think it just didn't like the Huawei equipment used for Tiscali LLU

The new router is better overall and syncs higher as well

Also, I must say that your website on SNR is very helpful and have passed it onto a few friends who have longs lines

[jid]

Well,

Gap3 906kHz-914kHz (Tone210-Tone211)

is a Radio Broadcast.

There is a distinct noise at

Gap2 875kHz-897kHz (Tone203-Tone207)

as well.

I'd classed those gaps all in about the same range...  from the first screen cap the gaps werent actually reported but they were visible on the graphs - hence why I said  at around 862 kHz.
The 2nd DMT cap actually lists the tones and the frequencies which are being blocked.

Your router wont use any bins where the SNR (not the same as SNRM) is below 6dB due to too much noise (interference) on that particular channel  and "shuts them off".

The gaps weren't listed in the first cap because SNR Monitor was on, they aren't shown when its on

So the gaps listed in the above cap are being "blocked"? Is that because there is interference on those mentioned frequencies?

As I tuned the radio into them and listed them in my previous post, trying to find the caused of why they are being "blocked".

[jid]

Dropping slightly now...

[kitz]

Thats still ok and within normal parameters.

btw jamie I just noticed your line stats from your router which you posted in the other thread.
Your output power is low - do tiscali still have you on the 6Mb profile do you know?

[jid]

Thats still ok and within normal parameters.

btw jamie I just noticed your line stats from your router which you posted in the other thread.
Your output power is low - do tiscali still have you on the 6Mb profile do you know?

Excellent, nice to see that my line can manage things, if I remember right, the line did go to about 8dB before I started having issues. Can I ask though, what are the normal fluctuation parameters?

Good thing is, since October 07, I have never had speeds over 5.4 so the speeds I am getting now I was getting before were a start!

Is there anything else I can really do to improve the sync speed, as obviously the line can handle more?

With regard to Output Power, the Router reports the Output Power the wrong way around on the web interface

On DMT its all OK and in the Telnet! Just a bug in Firmware (isn't latest).
DMT shows:

                     Down            Up
SNR (dB):       8.9             25.0
Attn(dB):       30.0            15.5
Pwr(dBm):       19.8            12.3
Max(Kbps):      6688            1016
Rate (Kbps):    6272            448

Do they look a bit more normal?

Many Thanks

Jamie

[kitz]

>> Can I ask though, what are the normal fluctuation parameters?

You cant say that easily, on some lines it may only be a couple of dB.. on other lines it many be 12dB. 
When reading line stats you have to look at the broader picture and take other the other figures into account.. you cant just focus on the SNRM alone, those figures on their own dont tell much.

>> Is there anything else I can really do to improve the sync speed, as obviously the line can handle more?

The usual stuff is connect from the master, asdsl filtered NTE5 master socket - all the usual stuff outlined
http://www.kitz.co.uk/adsl/socket.htm

>> With regard to Output Power, the Router reports the Output Power the wrong way around on the web interface

Ahhhh... that explains it - I wondered what was going on, and why it had dipped from your previous stats.

Keep recording the SNRM with routerstats, and if for about a week your SNRM doesnt drop below 6dB and your error count remains good.. then I think things are looking up .

[jid]

Thanks for that Kitz, but like I say, Master Socket isn't NTE5 so bit of pain really, if only the engineer who came out had put in an NTE5

Well connection has been up 8hours (reset router as it locked up the WiFi!).

Here are the stats and I have only just got in

                     Downstream     Upstream
Rate (Kbps) :        6656     448
SNR Margin (dB) :    11.4     27.0
Attenuation (dB) :    30.0     15.5
Output Power (dBm) :    12.1     19.8 < wrong way around
K (number of bytes in DMT frame) :    209     15
R (number of check bytes in RS code word) :    10     8
S (RS code word size in DMT frame) :    1     8
D (interleaver depth) :    32     2
Delay (msec) :    8     4
Super Frames :    1833955     1834008
Super Frame Errors :    573805     0
RS Words :    124708970     15588252
RS Correctable Errors :    98373975     0
RS Uncorrectable Errors :    3867245     N/A
HEC Errors :    550936     0
OCD Errors :    0     4
LCD Errors :    0     2
Total Cells :    486047214     0 
Data Cells :    174550      0
Bit Errors :    0     0
Total ES :    21147     0
Total SES :    9598     0
Total UAS :    12     0

Another thing I was going to ask, at that Sync should I be getting around 5.6mbps throughput? Could you recommend the best MTU for my connection please?

Thanks

Jamie

[kitz]

>> at that Sync should I be getting around 5.6mbps throughput

5.6Mb = 5734kbps  -  Looks about right after allowing for overheads.

>> Could you recommend the best MTU for my connection please?
MTU 1458 RWIN 102096  or 153144 should work good.

However, those suggestions are for BTw network.   Some of Tiscalis LLU routing may be configured differently so have a look at Working out your maximum MTU.
 

[jid]

>> at that Sync should I be getting around 5.6mbps throughput

5.6Mb = 5734kbps  -  Looks about right after allowing for overheads.

>> Could you recommend the best MTU for my connection please?
MTU 1458 RWIN 102096  or 153144 should work good.

However, those suggestions are for BTw network.   Some of Tiscalis LLU routing may be configured differently so have a look at Working out your maximum MTU.

Yeh I already have MTU at 1458 as thats what Tiscali say to use. Can't do RWIN though as I use Vista

Had a look at your guides but none really made a noticeable difference to be honest!