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vtr



8 posts

Wannabe Geek


# 39787 19-Aug-2009 13:37
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Sorry Folks broadband failure in middle of previous post
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First time poster, regular reader. For around 18 months I have been working with an ongoing challenge with the broadband modem competing with the telephone line to take control! For some 18 months we have tolerated what sounds like crossover as the modem handshakes and then runs in the background on its broadband duties at the same time introducing what sounds almost like white noise into the phone line. This makes for poor telephone conversations. In retaliation whenever we call out or receive a call the phone line disconnects the broadband service. We have been through the whole sad story of calling telecom help line, talking to a range of people in help desks here and other countries, used the telecom complex technical support email service, used the modem manufacturers online help desk etc etc. had two visits from Chorus, on the last a new phone line from the entry point at the house (in the attic) down a wall and into a new wall fitting with splitter fitted, all made no difference same outcome. Also I have disconnected the modem (a DSL 302G and now a DSL 502T) output so their was no radiating possibilities getting back into the phone line (anyway its ethernet and didn't make any difference) We have changed modems, changed filters 3 times, changed phones.. A day or so ago I had enough and had the opportunity to truly isolate the phone line and modem from any other external sources. I physically cut out the one extended phone line we have into another room, closed down all power and equipment in the general area, disabled anything I could find that may be causing some sort of interference with the modem out of left field that could contribute! Basically then the telephone network was a single brand new line from the entry to the house on the inside (in the attic) to the wall socket where a splitter is fitted behind a new wall fitting , the phone was then connected to the same wall fitting via a new filter. Outcome, exactly the same ie filters have no effect. I cant get past go on this one forget any modem settings or anything else we seem to be faced with a basic first requirement is a filter system that works? Yes? I'm thinking maybe we have a weird earth problem in the house that is preventing the filters from decoupling the modem noise , of course if we switch the modem off the problem goes away re noise on the line its pretty well a clear line. We are around 2.5km from the exchange on a standard adsl line, Pro Plan.

Looking for out of left field ideas.

Cheers Ken

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  # 248745 19-Aug-2009 19:09
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Hi Ken, so from what I can tell the line techs have replaced or checked for any bad joints so no half leg problems, and you have a central filter installed which should remove any issues of wiring within your house.

As you seem to have issues on the POTS side of things rather than the DSL (by the way whats the connection speed of the DSL service and S/N and attenuation readings) I wonder if there could be a fault in the filter in the exchange, if this is faulty then you will get POTs service issues also, but from what you say Chorus have checked everything through, or have they :). Have you asked to be moved to a different port on the DSLAM?

Cyril

vtr



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Wannabe Geek


  # 248938 20-Aug-2009 10:05
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Hi Cyril,
Thanks for the feedback the figs from a few minutes ago are below:
SNR         D/Stream  U/Stream
                     5           12
Line Att:        43           21
Data rate       672        416

Heres some further info..
On the first call the person seemed to know a bit about Broadband, apart from diagnosing an internal line fault (said there was an imbalance on a half wired pair causing high impedance/imbalance etc he did what he did, hooked up his laptop did a speed test and got us to make a call out and we called in, all good previous unseen speed appeared, no disconnenct, next day it was back to current situation. HOWEVER he said to me "so you have already had a service tech call i see" we denied that as no one has ever been on site, but he said oh no someone has changed a port at the exchange! I dont have the full figs from that visit but the attenuation and speed figs were so good for us I wrote them down as follows:
Down  18/5920  Up 43/736


Our average speed can be around 12-2200 tops down and typically 2-400 Up. When the Chorus/Downer guys came they said we were not considered a rural line and we should have figs typical of anyone 2.5Km or so from a exchange. We are 30Kms from Christchurch and 2.5Km from the Leeston exchange. I can manufacture for a short period of time, then it simply fades away to a lower speed, a higher speed by deliberately using the phone to disconnect the broadband service and 9 times out of ten it restarts at a higher speed say 2200-3000 then drops away to a rubbish fig again. It sort of reminds me of the dial up pattern where it would start fast, fast!, and if you were lucky enough to retain the link would slowly drop off to a reliable but dog slow rate.

I dont know how to respond to the Chorus comment because currently I feel very much about not biting the hand that feeds you, as we dont have an obvious alternative, nor can I find any one or any organisation that can come on site and make a solid repair with authority/knowledge and of course we are caught up in the current industrial unrest as the availability of knowledgeable people seems to be rather limited!

Hope this is not a red herring reply!

Cheers

VTR

 
 
 
 


vtr



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Wannabe Geek


  # 248989 20-Aug-2009 11:54
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second response to Cyril

An example at this time date 11.53am today
phone call inwards
Disconnect then reconnect
new adsl figs are:
12 12
34 18
4448 704

cheers
Ken vtr

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  # 248993 20-Aug-2009 11:56
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Sounds like there is still a fault on the line somewhere ... if you like you can pm me you dsl line number and I'll try to get someone to have a look at it tomorrow.

Have you tried the modems on another dsl line? (Just to confirm that the modems are ok)
Or maybe borrow a modem of someone not having problems.




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vtr



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Wannabe Geek


  # 249024 20-Aug-2009 13:48
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Hi Graider
I always was hopless on acronyms and synonyms pm is? I havent been through the lend me your modem routine yet, and I do acknowledge that its possible i have two noisy modems even if one is only a few days old, nagging doubt is that the older one 302G worked just fine in Christchurch central before we moved out of town with no noise etc om line, once i can get the pm explanation from you i will send through the dsl line number(assuming by dsl line number you are talking the telephone line number):. On the 18th of this month this was done yet again via the telecom complex technical support people as follows
quote:
I have checked your DSL line, it comes up with a good line. I have checked the technicians notes and it they have installed a splitter for you.
unquote:

thanks

Paul

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  # 249050 20-Aug-2009 14:36
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pm = private message (or email me)
dsl line number = telephone number

:)

I'll see if I can get someone to look into it for you but can't guarantee anything :(
If you could try another modem on your line it will tell us whether it is a modem issue or something on the line (filters, the copper, etc)




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  # 249051 20-Aug-2009 14:38
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Hi Paul, PM means personal message, you will see a rotating envelope at the top of the GZ forum banner next to your login, you will also have recieved an email which will link you through to the private (personal) message system.

As Quantum Raider has mentioned and I eluded to earlier, sounds to me as though there is still a bad joint on your line somewhere, and we all know how bad joints arent good for you. 2.5km of line should be able to give you 6-7Mb/s without any difficulties, so until you can achieve that all the time then you still have a fault. I somehow suspect its not your modems if two presumably good modems have similar issues and a central splitter has been installed. On that 2-3km of cable back to the exchange there could be literally dozens of cable joints, or maybe just a few, but only one needs to be corroded and you get similar results to what you have.

Cyril

 
 
 
 


vtr



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Wannabe Geek


  # 249085 20-Aug-2009 15:53
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Hi Cyril,

I want to believe theres a "bad joint" somewhere, you are right bad joints are ummm bad, because im darned if i can see where else i can look at but we are at the mercy of the exchange and its workers. Cant help but be suspicious that unknown to us a port is changed at the exchange, a guy turns up, does a houdini on the wire system, the half leg problem already mentioned I guess, we get what for us is blazing speed and no disconnects while he is on the premises then next day we are back to where we started?? we didnt knowlingly change anything! I guess the other issue is that we just want it sorted, dont care about the blame game, or the politics or or.. just tell us its A or B and fix it, regular communications back to the "complex issues team" always leaves you with a them and us feeling..
Joys of telecomms and broadband..
cheers Ken vtr (Paul) sometimes i forget my name..

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