Kitz Forum
Broadband Related => ADSL Issues => Topic started by: jid on October 03, 2008, 07:16:45 PM
-
Hi Kitz and All,
Well, I decided to take a risk and get a new router!
D Link DSL-2740B
Well delivered today and it first synced at 6540kbps!!! However as I was setting it up I have had to reboot it a few times to get it all done and dusted, which I now have, I have also managed to get both DMT v8 and RouterStats to be able to work with it!
I have started to monitor with DMT, so I am monitoring SNR over a 2hour period(just started), screenshot:-
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2Fdmt20081003_1912.png&hash=1cd0aa908df25d0d27dfc5692883362ba834e455)
It all seems pretty good to me! At least the SNR ain't in negative figures ;D
One thing I don't like though is the Interleave Depth, I believe its the highest possible?
So thanks to everyone on the forums for all of your help over that past few months, its greatly appreciated!
I will keep my eye on it over the next week or so and then maybe get the Target SNR adjusted and Interleave removed (condition depending).
Kind Regards
Jamie :)
-
Hi jid
I was just quickly looking at the forums before doing something else.... and I havent really had chance to look at your stats on there properly.
The graphs look very pretty... but the immediate thing that strikes me... what the heck is that gap at around 862 kHz?
Dont have time to look up now but anyone know what transmits at around that frequency and why theres no signal.
That certainly doesnt look like any sort of ISP dslam block - look how it curves down and then back up again... Noise???
-
H Kitz,
Thanks for the reply.
On every refresh I do on the DMT, that gap is always there in the same place :-\
Regards
Jamie
-
JID :
Do you live near a hospital or electronics factory ?
I think 862 is in the ultrasound range......megasonic frequency ?
-
JID :
Do you live near a hospital or electronics factory ?
I think 862 is in the ultrasound range......megasonic frequency ?
Nope, not that I can think of? Nearest to me is a Church!
-
Here is the latest from RouterStats over 1 hour:-
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2Frouterstats.png&hash=01fbf4e91b05546ec477883421d6549a49fccbb5)
I tell you what is great! I don't have to press enter twice to load a webpage anymore!!! :D
I am going to leave it well alone now to let it find its own stable rates etc. Hopefully I can return to normal with much more stable SNR :)
-
Hi all,
Just looking at the stats this morning its now at 15dB!
Its been up for over ten hours so snr must have just floated up to that!
In light of the improved SNR do you think I could ask Tiscali to drop me down to a 9dB profile?
Cheers
Jamie
-
Just looking at the stats this morning its now at 15dB!
Its been up for over ten hours so snr must have just floated up to that!
Im not quite sure if you understand how SNR and SNR Margin works (http://www.kitz.co.uk/adsl/linestats.htm), but this is normal and happens on hundreds of thousands of lines in the UK. SNRM does fluctuate.. its often at its worst in the evenings and better in the mornings.
Its why at one point why we were saying leave the router to settle to its own level... because if you boot up in the morning come the evening then SNRM will drop.. which causes your line to become unstable in the evenings. If you boot up in the morning with a high speed.. it may be fine in the morning.. but in the evening it will all go to pot.
Some lines suffer more than others with SNRM and the amount of the fluctuation may be much higher.
The amount of this sluctuation could either be due to a line fault... or interference... or its a long line which do suffer more.
Youre not on a long line, so you should get decent syncs.
- Have you got a screen cap of when the SNRM increased.. can you pin it down to a certain time?
- Can you post a DMT graph now - whilst the SNRM is higher.
- Hopefully theres not been a reboot as I'd also like to see your current stats.
As regards to that gap - its not normal and the indication is that somewhere you are picking up interference.
Ive had a google on those frquencies and its normal broadcasting channels. Theres not a radio HAM that lives near you is there? Someone with a stonking big ariel in their back garden.
-
H Kitz,
Sorry I don't have a graph of when the SNR went up as the PC or RouterStats wasn't on.
Mode : G.DMT
Type: Interleave
Line Coding : Trellis On
Status : Link Up
Downstream Upstream
Rate (Kbps) : 6560 448
SNR Margin (dB) : 12.1 25.0
Attenuation (dB) : 30.0 15.5
Output Power (dBm) : 12.3 19.8
K (number of bytes in DMT frame) : 206 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 : 1134510 1134460
Super Frame Errors : 238 0
RS Words : 77146710 9642910
RS Correctable Errors : 595162 0
RS Uncorrectable Errors : 364 N/A
HEC Errors : 163 0
OCD Errors : 0 0
LCD Errors : 0 0
Total Cells : 298397829 0
Data Cells : 594129 0
Bit Errors : 0 0
Total ES : 66 0
Total SES : 0 0
Total UAS : 39 0
Connection Up: 5hours 30mins
This is RouterStats, since the time that graph started, the line is pretty much the same, no dips etc.
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2Fstats_1037.png&hash=822cd11a4cf2d6ecbd72c2070556831d70fa189e)
Here is the DMT, as you can see, gap is still there:-
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2Fdmt20081004_1248.png&hash=b0ad461208a3017ae30d10c83c2de162439b2ad9)
No Amateur radio stations/broadcasts or big aerials nope :-\
Cheers
Jamie :)
-
I was hoping that routerstats would have picked up the recording of the increase so you could see what time it happened and if it was gradual.. or if it was "flick of the switch".
That gap is strange and could well point to the root of your previous problems.. it could be that you actually have a REIN fault (http://www.kitz.co.uk/adsl/rein.htm)
-
So that Gap is obviously some sort of high interference source then?
Its funny, as the SNR issues have now gone with the new Router? (Broadcom Chipset)
Its only been up 5 hours as I had to change the WiFi security settings a bit :-\
I will leave it on now for the day and night and see the outcome in the morning, also router stats will run until I turn my PC off, and I will alert you of those results.
Say if it stays stable for the week, would it be worth removing interleave, or even dropping target SNR? Obviously 12dB SNR is holding the speed back a bit?
Thanks
Jamie :)
-
>> So that Gap is obviously some sort of high interference source then?
It would appear so - although this type of interference can also come from faulty monitors, or any other type of electrical equipment.
-
>> So that Gap is obviously some sort of high interference source then?
It would appear so - although this type of interference can also come from faulty monitors, or any other type of electrical equipment.
Hmm, well the router is next to my monitor, if that makes a difference?
I won't do any moving around of the router yet as I want to leave it up for you to see the graphs etc tomorrow, however I may connect up to the Master Socket tomorrow and run DMT to see what it brings.
-
I may be wrong but I believe some of the newer RFID systems run on a similar frequency.....tagging systems used in logistics warehouses....any large supermarkets or DIY or transport/logistics warehouses near you ?
Certainly ultrasonic cleaning systems use this frequency, but I didn't think it was used in this country by radio hams....USA yes.
From the graph it seems to run from around 870kHZ to 897kHZ then another smaller gap 900kHZ to 915kHZ.....strange.
-
I may be wrong but I believe some of the newer RFID systems run on a similar frequency.....tagging systems used in logistics warehouses....any large supermarkets or DIY or transport/logistics warehouses near you ?
Certainly ultrasonic cleaning systems use this frequency, but I didn't think it was used in this country by radio hams....USA yes.
From the graph it seems to run from around 870kHZ to 897kHZ then another smaller gap 900kHZ to 915kHZ.....strange.
Well there is big ASDA next to my exchange if that makes a difference? Nothing near my house though!
-
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2Fstats_1812.png&hash=1f41597f4aea7a0682af9a5db0f5478a485c5ebe)
Latest graph, SNR has dropped from 12 to 7.5, sync still 6560kbps...
-
Have you tried the "radio trick" mentioned REIN faults (http://www.kitz.co.uk/adsl/rein.htm)
-
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
-
Well,
Gap3 906kHz-914kHz (Tone210-Tone211)
is a Radio Broadcast.
There is a distinct noise at Gap2 875kHz-897kHz (Tone203-Tone207)
as well.
-
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...
-
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".
-
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 :)
-
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".
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2Fdmt20081005_1238.png&hash=bab69e90988cc188045b759826e83253784f4b9c)
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".
-
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2F051008-2020.jpg&hash=9413ca958427e1142ecc7df31ebbda7df4ad4e78)
Dropping slightly now...
-
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?
-
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 :)
-
>> 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 :).
-
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
-
>> 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 (http://www.kitz.co.uk/adsl/tweak2.htm) 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 (http://www.kitz.co.uk/adsl/MTU2.htm).
-
>> 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 (http://www.kitz.co.uk/adsl/tweak2.htm) 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 (http://www.kitz.co.uk/adsl/MTU2.htm).
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!
-
Yep - without actually sitting and doing the overheads calculation I thought you may be nearing the limits for your synch.
-
Excellent ;D
Noticed this though: RS Correctable Errors (FEC i imagine) : 98,373,975
Connection up about 9hours now...
-
Yes (http://www.kitz.co.uk/adsl/linestats_errors.htm)
-
And everything was going so well ::)
Here was the last graph, at which point I couldn't load any pages and FEC errors were in their billions!
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2F1818.png&hash=1fc8138ed3816eb768ec4ee79fcff56d95d6e9b5)
The SNR only went as low as 7.9dB as well, I would have thought it would have been fine there?
Mind you perhaps the 6656kbps sync was too much for the SNR Margin to handle?
-
>> The SNR only went as low as 7.9dB as well.
:'(
Possibly down to the way certain routers load the frequency bins.. Some routers may give more stable results at certain levels, yet others are able to hold onto a line at much lower frequencies than others.
-
>> The SNR only went as low as 7.9dB as well.
:'(
Possibly down to the way certain routers load the frequency bins.. Some routers may give more stable results at certain levels, yet others are able to hold onto a line at much lower frequencies than others.
So are the gaps interference, so I guess I can't really do much with them :no: So is 7.9dB too low then?
Well that's all I need! :o I really need to upgrade the Firmware as it has a new Broadcom firmware in it. Something to do tomorrow! :-\
Funny, its 13dB now!
So what do I need to do now, keep the sync down a bit more is it? I have it at 5760 but will try to get to 6100 or 6200 and give that a go tomorrow.
-
Well I though I would see if I could get it sync at what i may have been getting before upgrading. I was getting 5.1meg before going LLU (maybe that noise causing issue) as I haven't had 6.5meg since December 2007!
I have now managed to sync at 6496kbps and throughput is 5593kbps.
SNR has been 11.9dB to 12.1dB since I came in so that is a plus *jid crosses fingers to hope it continues!*
IN 8hours the line has made 313 CRC errors and 2million odd FEC errors so not bad considering (I hope!)
I understand that fluctuation in the evening is normal due to more interference etc, however how did the connection loose the world to work at 7.9dB? Must be those gaps which I fear started up in December 07 ;D
Edit @ 18:23, added graph:-
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2F1719.png&hash=16d9a3be1cc5bb33add541f2fc11ba5f767aba6b)
-
DMT is showing no errors in the past hour so thats cracking at 10.9dB - 11.1db :)
I have requested to have Interleave off to do some experimenting, does it effect speed of loading webpages as I have read?
I suppose I could always have it switched back on if need be, and I suppose with LLU it can be done in a resync?
-
You wont notice the effect of interleaving during surfing.. or in fact general internet use.
Its only for time sensitive applications such as gaming where people normally notice.
However... if you have lots and lots of FECs and then turn off interleaving then theres a strong possibility that those FECs will then become CRCs.
Too many CRCs will slow your traffic down because packets have to be re-requested.
-
Ok, well they have told me that they can't do it in the Forums so it is still on. I don't game so thats fine and I will leave it on.
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2F1857.png&hash=53989c6b32ce5db2565727a9e01d37d3c21ee60a)
;D I suppose this is normal fluctuation behavior?
-
Well i came upstairs at around 11 last night to find the Internet light was red >:D
I checked the logs and there were loads of entries saying:-
PPP LCP UP
Then it would connect for five then the above entry would be there about ten times then it would connect and disconnect and so on...
I did check the SNR and it was 9.9dB and the ADSL link was unaffected.
Is this an ISP issue or otherwise?
Cheers
Jamie
-
Well i came upstairs at around 11 last night to find the Internet light was red >:D
I checked the logs and there were loads of entries saying:-
PPP LCP UP
Then it would connect for five then the above entry would be there about ten times then it would connect and disconnect and so on...
I did check the SNR and it was 9.9dB and the ADSL link was unaffected.
Is this an ISP issue or otherwise?
Cheers
Jamie
Anyone got any ideas why this is happening?
-
http://forum.kitz.co.uk/index.php?topic=2247.msg77836;topicseen#msg77836
Not sure - but PPP is usually the ISP bit...
Possibly problems logging into your ISP or a router config problem.
-
http://forum.kitz.co.uk/index.php?topic=2247.msg77836;topicseen#msg77836
Not sure - but PPP is usually the ISP bit...
Possibly problems logging into your ISP or a router config problem.
Well I have posted on the Forums, I will see what they say about it. If not, I will email them.
Cheers
Jamie
-
Update:-
Have updated Router firmware by two versions! Loads of features have now appeared including:-
- Routing
- SNMP
- Improved Stats pages
- And.......Output power is the right way around!!!! :graduate:
I am going to trial the firmware for overnight and see how it performs, i am currently at 5664kbps after the reboots due to Firmware updates so I will see how it goes with regard to PPP session issues, as it seemed the router locked up when they happened so it may have been a firmware issue?
DMT latest, more gaps >:(
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2Fdmt20081009_2151.png&hash=377bc51b799ec9698bbbea80e15b6560001ce088)
What I did find was I unplugged one of those plug in extensions and the big gap around 800 became much smaller so I may get a much better CAT5e so I can hard wire to the master like the CAT5e used on the Router upstairs, anyone know where I can get a tidy one as the Sky+ and main phone is connected to it :o
Regards
Jamie
-
Well its still dying with 8.9dB of margin at around 8pm. Resync fixes it though?
Can't really see whats causing it, also in talks with Forums about PPP LCP issues.
Regards
Jamie
-
Well its still dying with 8.9dB of margin at around 8pm. Resync fixes it though?
Can't really see whats causing it, also in talks with Forums about PPP LCP issues.
Regards
Jamie
I know the feeling. :wall:
-
Well its still dying with 8.9dB of margin at around 8pm. Resync fixes it though?
Can't really see whats causing it, also in talks with Forums about PPP LCP issues.
Regards
Jamie
I know the feeling. :wall:
It does give you the :wall: feeling!
Its so annoying that every night I have to resync the router to make it work again!
-
Think I have found the problem to be with a Plug in extension :-\
The sudden ups in SNR are me unplugging and plugging back in the extension:-
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2F1110-1831.png&hash=e68d78f0733586e589623026876822d2724fb014)
Thing is my Sky box is on that extension, cordless dual phone base is as well but that can be moved around. Only other thing I could do is disconnect it and connect it every month?
Or I would have to re-wire it but connect it into the Master Socket.
I had 2000 FEC throughout the day and in the last 20mins I now have over 2million, obviously that extension is picking up a lot of interference?
I will disconnect it tomorrow and one DMT and post the screenshot to see what happens with those gaps.
-
I thought you said in the past you had checked from the test socket behind the master and the problem was still there?
-
I thought you said in the past you had checked from the test socket behind the master and the problem was still there?
Don't have a test socket and just connected direct to Master Socket socket!
Must be interference or fluctuation as its back up now...
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2F1110-1839.png&hash=3d02d4f82c59b2a790ddd85833315410ef0263db)
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fi113.photobucket.com%2Falbums%2Fn217%2Fjamieidavies%2Fadsl%2Fdmt20081011_1839.png&hash=6b0f85365bbb9154ba8b3729a71b373465152347)
-
Starting at your master socket can you describe your wiring set up? i.e. placement of filters, length (rough guess) and type of extension cables and all the devices that you have attached.
-
Starting at your master socket can you describe your wiring set up? i.e. placement of filters, length (rough guess) and type of extension cables and all the devices that you have attached.
Master > Plug In Extension Splitter > Filter > Corded BT Phone
>Filter > Splitter > Main Cordless Phone Base & Sky+(needs to be as part of 12month contract)
Master > Hard Wired Extension > Front Room Phone > Upstairs Bedroom >Filter (router) > 2nd Bedroom > Filter >Phone
10m all together of extension cable (including plug in and hard wired)
Hard wired extensions are Star Wired i believe, on to the other.
Attached are RouterStats graphs, latest is first. I have been out since 7:30pm and got back 22:20 but seems as if the connection has been OK.
Also attached recent DMT screenshot.
Errors (connection up 12 hours):-
RSCorr: 24711728 0
RSUnCorr: 194289 0
HEC: 45925 0
Thanks
Jamie
[attachment deleted by admin]
-
IMO.you cannot leave your router alone,you are constantly messing about with your connection.If your isp cannot sort this out,get a MAC and go with someone who can,otherwise I don't think this thread will ever end.
-
Well yes, this thread was entitled "SNR Problems Solved" but it seems that was premature. I'm afraid to say, Jamie, that endlessly posting your stats and graphs here isn't going to fix it.
-
Point taken guys.
The connection has been up 22 hours now without any issues so I suppose that is an advantage.
-
Disconnected suspect extension, sycned at 6624kbps, 12.9dB snr. Plugged it back in and dropped to 10.4dB.
I have a feeling it won't last long.
So thanks for all of your help guys and I now feel so stupid that the problem is in the house after all :-[ :o ???
Anyone have any suggestions as to my Sky+, obviously moving the phone isn't the issue, its the Sky box telephone line? Anyone recommend some good quality extension cabling and where I can get it, its the flat type at the moment whereas the rest of the house uses CAT5e as purchased in the BT shop down town about 10years ago!
-
Master > Hard Wired Extension > Front Room Phone > Upstairs Bedroom >Filter (router) > 2nd Bedroom > Filter >Phone
I might be wrong but the unfiltered front room phone could be part of your problem. Also flat-type cabling is not recommended.
Read this carefully before deciding what to do especially the section on How to get it Wrong :-
http://usertools.plus.net/tutorials/id/13
-
Master > Hard Wired Extension > Front Room Phone > Upstairs Bedroom >Filter (router) > 2nd Bedroom > Filter >Phone
I might be wrong but the unfiltered front room phone could be part of your problem. Also flat-type cabling is not recommended.
Read this carefully before deciding what to do especially the section on How to get it Wrong :-
http://usertools.plus.net/tutorials/id/13
Sorry, Front Room Socket that should have been ??? Nothing is connected to that.
I looked at the How to do it wrong bit and my setup is the same. At the master there is a splitter, out of the bottom comes the flat wire which runs to the back room upto a socket, then Splitter > Sky & Phone
I will take some pictures if you would like them, its hard to explain!
-
A few pics would be useful.
-
A few pics would be useful.
Ok, no probs. What do you want pictures of exactly? Master / actual pics of the wires used?
Thanks
Jamie
-
A pic of the master socket that shows how you have it set up with the splitter/wiring/filters.
-
A pic of the master socket that shows how you have it set up with the splitter/wiring/filters.
http://i113.photobucket.com/albums/n217/jamieidavies/adsl/DSCF1880.jpg
Pic of master socket...
*edit*, did a bit of investigating and have changed the setup on the master slightly:-
http://i113.photobucket.com/albums/n217/jamieidavies/adsl/DSCF1881.jpg
Has been 11.7 - 11.8dB since.
Is it possible for me to hard wire the Sky extension? Cables 2 and 5 go into a mini RJ11 plug which go into the bottom of a splitter, do you think I could get them out of that and connect them direct to the extension socket? Would it improve anything at all?
Thanks
Jamie
-
Yes what you have changed it to is better.
Now ideally your modem/router should be connected to that RJ11 socket of the filter that is plugged into your master socket (the one in the picture). If it's inconvenient to site the router near to the master socket I would suggest you purchase (or make if you feel confident enough) a long rj11-rj11 modem cable.
I myself have a similar set-up and I use a pro+ RJ11-RJ11 extension cable from adslnation.com (they sell different lengths up to 20m) and are pretty reasonably priced. It performs better than an equivalent Belkin cable I have.
-
Yes what you have changed it to is better.
Now ideally your modem/router should be connected to that RJ11 socket of the filter that is plugged into your master socket (the one in the picture). If it's inconvenient to site the router near to the master socket I would suggest you purchase (or make if you feel confident enough) a long rj11-rj11 modem cable.
I myself have a similar set-up and I use a pro+ RJ11-RJ11 extension cable from adslnation.com (they sell different lengths up to 20m) and are pretty reasonably priced. It performs better than an equivalent Belkin cable I have.
OK.
Just have to now get around the Sky box, it has an extension as well, but that is CAT5e cable (it says on it). Is it possible to hard wire a Sky extension into the Extension socket? Well, the router is upstairs and this is in my Hallway, so I would have to have a cable all of the way up the stairs and to my room! May connect it to that RJ11 socket on the filter and run the wireless for a while (N draft).
Thanks for all of you advice, its most appreciated :)
Jamie
-
I wouldn't hard wire the Sky box.
Out of interest how long have you had your contract with Sky, and do you use use the interactive services or order sports or movies?
-
I wouldn't hard wire the Sky box.
Out of interest how long have you had your contract with Sky, and do you use use the interactive services or order sports or movies?
Been in contract for 4months. When I had my old Sky box (for 6years) I only plugged it in the for 3months as the extension the engineer installed was dud, and died after the 3months. After 12months I pulled up the cable and never replaced it.
I have an extension socket in the back room and it had a filter in on the time of Sky+ install, so as the engineer didn't have much CAT5e cable, he decided to make the cable too short for me to plug it directly into the socket >:(
I think I will have to move the socket (i hope i left over enough cable inside) as changing around the setup at the master has seemed to help the SNR a lot:)
I suppose what I should do is re-wire the flat extension?
-
SNR problem solved,am I missing something here. :hmm:
-
SNR problem solved,am I missing something here. :hmm:
:lol:
That was the title!
I now have the setup with the filer at the master as I just moved the Extension socket.
Will see how it goes.
-
Well the good news is SNR hasn't gone below 11dB :D
Thanks orainsear for your advice on extensions, it seems to have worked a treat!
I am now ahppy with my 6624kbps sync speed, 5.7 throughput so I am chuffed to bits about that! :D
Errors have built up on the FEC front but as they are corrected ones I don't mind about that.
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fwww.speedtest.net%2Fresult%2F337866495.png&hash=822c68b68233cbc5d7b5267c1fa13bff77ea61dc) (http://www.speedtest.net)
Many thanks to everyone who posted:)
Regards
Jamie
-
Hallelujah :clap:
-
SNR is 12.9dB :clap: :thumbs:
Been up for 1day 30mins. Stats are looking good:-
Mode : G.DMT
Type: Interleave
Line Coding : Trellis On
Status : Link Up
Downstream Upstream
Rate (Kbps) : 6624 448
SNR Margin (dB) : 12.9 26.0
Attenuation (dB) : 30.0 15.5
Output Power (dBm) : 19.8 12.3
K (number of bytes in DMT frame) : 208 15
R (number of check bytes in RS code word) : 8 8
S (RS code word size in DMT frame) : 1 8
D (interleaver depth) : 32 2
Delay (msec) : 8 4
Super Frames : 5187633 5187627
Super Frame Errors : 638 0
RS Words : 352759074 44094829
RS Correctable Errors : 9550927 0
RS Uncorrectable Errors : 1537 N/A
HEC Errors : 403 0
OCD Errors : 2 0
LCD Errors : 0 0
Total Cells : 1377756086 0
Data Cells : 5128153 0
Bit Errors : 0 0
Total ES : 11140 0
Total SES : 3970 0
Total UAS : 254 0
The gaps on DMT seem to have shrunk as well, will post them later. All because of one extension, I feel such an idiot that I didn't check before :-[ :wall:
So if the SNR stays like that should I be able to get more speed out of the line now? Say if I leave it for a week?
Many Thanks
Jamie
-
>>> The gaps on DMT seem to have shrunk as well, will post them later.
That's really not necessary. We'll take your word for it.
-
>>> The gaps on DMT seem to have shrunk as well, will post them later.
That's really not necessary. We'll take your word for it.
:) Ok
Would you say that the extension has most likely been causing all the issues I have been having?
How would I go now at getting an even higher sync?
Many Thanks
Jamie
-
Just to make it clear on the plug in extention have you a filter at the socket end or at the sky box end ?
If its at the sky box end then try socket then micro filter then splitter, ext wiring any any apperatus
-
Just to make it clear on the plug in extention have you a filter at the socket end or at the sky box end ?
If its at the sky box end then try socket then micro filter then splitter, ext wiring any any apperatus
Hi Ezzer,
I did have the filter at the Sky box end.
Now I have the filter at the Master Socket / Splitter end.
http://i113.photobucket.com/albums/n217/jamieidavies/adsl/DSCF1881.jpg
So setup is now like this:-
Master > Filter > Socket > Splitter / Sky > Phone
Hard wired extension > Socket > Filter > Router
> Socket > Filter > Phone
So I basically did as you suggested and my SNR has been 12.8 - 12.9dB all day and the gaps I had in DMT are now much smaller too!
-
The title of this thread is SNR problem solved,yet here we are 6 pages later (and still growing).UB goes outside to trap his head in the car door. :wall:
-
The title of this thread is SNR problem solved,yet here we are 6 pages later (and still growing).UB goes outside to trap his head in the car door. :wall:
In theory it is now Solved, so I could open another saying "SNR Issues Actually Solved"! :lol:
-
Perhaps the thread should be locked?