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Author Topic: How to interpret the BTVoyager 240 ADSL Line Status diagnostics please  (Read 3911 times)

graevine1

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 ^-^  :-[ Hi there, I have a BT Voyager 240 router/switch (the 240 does not appear to be listed in the BT Broadband Desktop Help menu) and was converted onto Broadband with VOIP line last Christmas 2005. The buck passing and failure to get results is enough to send someone to another place! I am approx. 3 km from the exchange and I believe all my problems are down to poor quality and aged line plant, both underground and overhead lines. I wish to be able to interpret and understand what is meant by K, R, S, D, SuperFrame Errors, RS Correctable Errors, RS Uncorrectable Errors and HEC Errors, etc., on the ADSL Line Status print out that I am regularly taking off the router. On the 18th July I was converted to DSL Max and my VOIP line was made usable on 18th September following the 10v adapter being found to have the wrong firmware as my service had been migrated from the NGCP platform to the SIP platform. Any comments, views and assistance are very welcome!
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kitz

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Re: How to interpret the BTVoyager 240 ADSL Line Status diagnostics please
« Reply #1 on: September 23, 2006, 05:28:24 PM »

Hi graevine and welcome to the forums :)

The most important stats that you can get from your router to help you understand what is going on with your connection are

~ connection (sync) speed
~ SNR (Noise) margin
~ Attenuation.

There is a guide to help you understand what they mean on my Interpret your line stats page.
However, if you want, feel free to post your stats in here and someone will possibly comment on them.

As regards to the errors, I dont know of a site where which gives a consise explanation of what they mean in simple format..  possibly the best explanation is on wiki (unless someone else knows different).

http://en.wikipedia.org/wiki/CRC-based_framing
http://en.wikipedia.org/wiki/Forward_error_correction
http://en.wikipedia.org/wiki/Header_Error_Correction


Basically lots of errors isnt good as it means that your router at some point hasnt received all the packets transmitted correctly.  This in turn leads to slower speeds, as you router has to re-request the data.
Seeing a few of these errors on their own isnt really much help when diagnosing.. Im on a good line close to the exchange but even I see errors from time to time. - When it does cause a problem is when you have a lot of these (100/1000s) within a short time span.
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How to get your router line stats :: ADSL Exchange Checker

graevine1

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Re: How to interpret the BTVoyager 240 ADSL Line Status diagnostics please
« Reply #2 on: September 23, 2006, 08:30:10 PM »

Thank you Kitz for such a prompt reply. I should have come onto a site like this sooner. I shall reply in full a little later, with more details.  :) and maybe I can be of assistance to you all.
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soms

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Re: How to interpret the BTVoyager 240 ADSL Line Status diagnostics please
« Reply #3 on: September 23, 2006, 11:10:20 PM »

I recon i'm getting alot of line errors(?)

23/09 evening line stats
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kitz

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Re: How to interpret the BTVoyager 240 ADSL Line Status diagnostics please
« Reply #4 on: September 24, 2006, 01:40:48 PM »

>>  I shall reply in full a little later, with more details

youre welcome..  :)
await your reply.
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How to get your router line stats :: ADSL Exchange Checker

kitz

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Re: How to interpret the BTVoyager 240 ADSL Line Status diagnostics please
« Reply #5 on: September 24, 2006, 01:44:19 PM »

>> I recon i'm getting alot of line errors(?)

yeah a fair few there soms :/

The problem with errors though is sometimes you may get a whole stack of them racking up in a very short period of time, from a particular burst..  or they may occur over a longer period of time.
Which ever way it will slow your speed down to some extent or other whilst this is occuring :/

Im not sure what else to suggest in your case really, because I know youve already "been there" and tried just about every trick in the book to do what you can on your line.

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How to get your router line stats :: ADSL Exchange Checker

EVIL-SCOTSMAN

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Re: How to interpret the BTVoyager 240 ADSL Line Status diagnostics please
« Reply #6 on: October 08, 2006, 02:36:46 AM »

This is my stats for a 24 hour period of weirdness.

FEC Errors (Up/Down):   0 / 317.155
CRC Errors (Up/Down):   0 / 524
HEC Errors (Up/Down):   0 / 621

over 1/4 million errors in just under 24 hours  :P

is there a prize, and if so do I win ?
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anything