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Author Topic: Nosing in BT Wholesale ADSL checker found something!  (Read 1020 times)

renluop

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Re: Nosing in BT Wholesale ADSL checker found something!
« Reply #15 on: August 10, 2017, 10:01:33 AM »

having read the comments in the ISP Review article about inaccuracies, I'm tempted to treat my find like a sleeping dog.
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Dray

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Re: Nosing in BT Wholesale ADSL checker found something!
« Reply #16 on: August 10, 2017, 10:20:22 AM »

That description looks a bit hard to implement but always nice to see how close DSLstats actually is to official test equipment documentation :)
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ejs

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Re: Nosing in BT Wholesale ADSL checker found something!
« Reply #17 on: August 10, 2017, 04:33:15 PM »

I'm going to ask my own related question: How does it know if you have a NTEFaceplate?

I don't know exactly how it works, but it's mentioned in BT STIN 517 (SOGEA).
Quote
3.2.9 SOGEA Faceplate
SOGEA front-plates may contain passive electrical signatures that will allow Openreach to
determine which type of SOGEA face-plate is attached to the circuit. These circuits do not
change the electrical poperties of the line as defined in SIN349 [3].

The VRI and NTEFaceplate items in the checker are probably so that ISPs can determine if a line is ready for SOGEA or if they would need to send someone to fit an NTE5C and faceplate. Probably not so much about checking if you have the latest and greatest faceplate for your xDSL service.

The Bridge Tap item was added slightly earlier than the SOGEA items.
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kitz

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Re: Nosing in BT Wholesale ADSL checker found something!
« Reply #18 on: August 12, 2017, 10:59:57 AM »

As my information came from the BT Wholesale ADSL checker, surely it would only be looking at the wiring up to the  BT - EU demarcation point. Wouldn't it?

As per my post above,  its identified by looking at the same data which is used for hlog graph.

A thought occurs.   The bridge tap on there will likely have been picked up by the equivalent of a hlog from line data, which [means] it may be possible to view using DSLstats and a compatible modem.

Not always easy to spot though unless its quite sharp or repetitive.  From the graph we have to use our eyes looking for variances.  If you have the raw data before its graphed, then it would be possible to specifically look and analyse for variances of more than 'x'dB within a certain range of tones.
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