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2 posts

Wannabe Geek

Topic # 150968 9-Aug-2014 13:37
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Ok, so i had vdsl setup up at my house 5 or so months ago. ive had an ongoing issue with weird sync rates and dsl drops for sometimes up to 2 hours with no dsl feed to the modem. so i inspected the install and found that there were wires from the cat3 sticking out of the phone jack so i removed it to have a look and it all basicly fell apart and was a very bad install, so... i complained to telecom and a tech was sent out, the tech turns up inspects the job and says he'll get the guy to come back. so, the other tech turns up around 5pm i explained to him i wasnt happy and that i wanted cat6 installed from where it comes into the house down to the modem, the tech was good and did it without issue. so i thought maybe that would make the line more stable as it had already been over 10 days the "line training" period. 

so, this didnt work. so after about another month hoping it would become more stable i rang telecom back and explained everything was still bad, they did more line tests and sent another tech, this has happend another 5 times, techs have changed my port changed the pairs checked all cable from roadside to house and cant find any issues. so i have been reading up and came across some good stuff... now what i have found is, on my router/modem im able to disable UPBO "up stream power backoff"and when i do so and its not comunicating with the DSLAM, it never drops and is stable and i noticed the "power up" and "power down" in the line stats in the router state they are 8.0 db and 8.2 db. now when i enable UPBO again they drop to -6.5 and -6.2 and the line will drop again in a few hours, i have spoken the to complex internet team several times and none of them seem to know what it is, chorus tells me the line stats are ok. 2 dsl drops and 2 ppp drops in 12 hours is within their range and wont send out a tech. and thats fine as im sure the line is fine i think its the DSLAM that is casuing the problem through UPBO yet they have no idea what im talking about and cant help me, i also inquired if i had bitswapping enabled on my profile this they couldnt help me with either. so im stuck chorus cant help and neither can telecom yet without talking to the DSLAM ill never achieve a DLM1 profile, and its driving me insane....

basicly bad UPBO can cause your SNR slowly drop away, and your BER to increase and the feed to drop.

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5593 posts

Uber Geek
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  Reply # 1105382 9-Aug-2014 13:37
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Hello... Our robot found some keywords in your post, so here is an automated reply with some important things to note regarding broadband speeds.



If you are posting regarding DSL speeds please check that



- you have reset your modem and router



- your PC (or other PCs in your LAN) is not downloading large files when you are testing


- you are not being throttled by your ISP due to going over the monthly cap



- your tests are always done on an ethernet connection to the router - do not use wireless for testing



- you read this topic and follow the instructions there.



Make sure you provide information for other users to help you. If you have not already done it, please EDIT your post and add this now:



- Your ISP and plan



- Type of connection (ADSL, ADSL2, VDSL)



- Your modem DSL stats (do not worry about posting Speedtest, we need sync rate, attenuation and noise margin)



- Your general location (or street)



- If you are rural or urban



- If you know your connection is to an exchange, cabinet or conklin



- If your connection is to a ULL or wholesale service



- If you have done an isolation test as per the link above



Most of the problems with speed are likely to be related to internal wiring issues. Read this discussion to find out more about this. Your ISP is not intentionally slowing you down today (unless you are on a managed plan). Also if this is the school holidays it's likely you will notice slower than usual speed due to more users online.



A master splitter is required for VDSL2 and in most cases will improve speeds on DSL connections. Regular disconnections can be a monitored alarm or a set top box trying to connect. If there's an alarm connected to your line even if you don't have an alarm contract it may still try to connect so it's worth checking.



I recommend you read these two blog posts:



- Is your premises phone wiring impacting your broadband performance? (very technical)



- Are you receiving a substandard ULL ADSL2+ connection from your ISP?

I am the Geekzone Robot and I am here to help. I am from the Internet. I do not interact. Do not expect other replies from me.


457 posts

Ultimate Geek
+1 received by user: 47

  Reply # 1105589 9-Aug-2014 19:46
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If this is a Spark (telecom) issue, why have you posted it in the Snap forum?

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Wannabe Geek

  Reply # 1105641 9-Aug-2014 21:26
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its wasnt intended i posted of the vdsl tuning thread without realising it was in the snap forum section. but ill take help from anyone that knows anything about this problem.

BDFL - Memuneh
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Ultimate Geek
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  Reply # 1105767 10-Aug-2014 09:55
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Can you please post some more details about the modem you're using? Others using the same modem may be able to provide some suggestions.

If you're able to, could you also please also post screen shots of:
* your connection stats screen, showing line speed, attenuation, etc
- with UPBO enabled (i.e. bad connection)
- with UPBO disabled (i.e. good connection)
* the screen where you can enable/disable UPBO

There may be additional information in those screens that can indicate what's going on and why.

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  Reply # 1105966 10-Aug-2014 17:32
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Without answering any of the questions asked above there is very little, if any, advice that anybody on here can give you.

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