@esistjuri wrote:
By ‘line has been stabilized at level 1’ do you mean seamless rate adaptation?
Which ISP should I contact (Init7/Swisscom)?
Thanks for your answer.
As a rule, an SNR > 6 dB indicates stabilization.
For maximum speed, it is also important that your supply line is between the UP (transfer point/connection box) and the Internet box or FritzBox as executed:
A direct, shortest possible point-point connection with U72m cable without clamping, connectors, parallel sockets, branches, bridge taps, filters, splitters, terminating resistors.
Sorry if I said that wrong, but at some point in the forum I read that a “normal” Anschluss shows an SRA of 6dB/6dB and the higher the SRA is displayed (9, 12, 15 dB), the higher the degree of stabilization.
Isn’t that the case?
In many cases in the forum with bad or faulty connection lines (UB<>IB) this has turned out to be true. The speed was reduced (i.e. much smaller than the information in the checker) and the SRA was at 9, 12 or 15 dB. After renovating the line or switching off the PowerLAN, after a while the SRA was at 6 dB and the speed was OK.
How can you see from the router’s diagnostic data whether stabilization is active or not? So far, I and other SU have often used the SRA as an indication of problems with the supply line or the associated stabilization.
Please let us know the English. Stay tuned:
SNR: Signal to Noise Ratio
TNR: Target Noise Ratio
SRA: Seamless Rate Adaptation
FRA: Fast Rate Adaptation
Forget the last two, the DSLAM regulates everything itself so that there are no interruptions in the event of brief disruptions.
The TNR is the default that we give the DSLAM for each port and it then sets the speed to achieve this SNR. However, a line can have a higher SNR at full speed without any stabilization (TNR specification > 6dB). This is often the case with good VDSL2/vectoring lines (e.g. mine). An SNR of >6dB is no guarantee that there is stabilization. But at least an indication that this should be pursued. We only see the actual stabilization specification (TNM) in the systems.
Roger G.
Swisscom (Schweiz) AG, Product Manager Wireline Access
Thank you very much for the explanations.
When it comes to SRA, we learned this in the trade school; at that time we still spoke German even in technology. Anyway, that’s the crux of the matter with the abbreviations, in German technology books SRA is still used today for signal-to-noise ratio, but at BMW SRA means headlight cleaning system 🙂
It would certainly be helpful if you could also display the information as to whether the line is stabilized or not in the GUI of the IB.
@hed: Had to smile at your argument. I’m just imagining a BMW-driving pensioner who went to trade school in 1977… Did you learn FEAM? 😉
@Roger G: I think it’s great that you did the clarification in the depths of the network diagnostic tools for the @esistjuri. This goes in the direction I wanted in another thread. You too get the “nerd-for-nerds medal” from me: 🎖️And that’s not cynical, is it? 😉
For me as a customer - regardless of which provider - I would feel the need to diagnose this for my Anschluss, as a full-blown nerd feature. Just like the switches are missing every now and then, the measuring point in the system is missing not just in the IB. Maybe this “measurement” can be offered relatively easily so that laypeople could benefit as well as nerds? Or do you also make these analysis tools available to BBCS 2nd and 3rd level supporters? Or asked again: Would Yuri have had the chance to get this information from Init7 Support? 🤔
@esistjuri: I hope these questions don’t hijack another thread again.
No offense!
🙋♂️
@andiroid wrote:
For me as a customer - regardless of which provider - I would feel the need to diagnose this for my Anschluss, as a full-blown nerd feature. Just like the switches are missing every now and then, the measuring point in the system is missing not just in the IB. Maybe this “measurement” can be offered relatively easily so that laypeople could benefit as well as nerds? Or do you also make these analysis tools available to BBCS 2nd and 3rd level supporters? Or asked again: Would Yuri have had the chance to get this information from Init7 Support? 🤔
The data that is visible in the router is completely sufficient for 99% of all customers, even for freaks and nerds. We do not carry system data such as stabilization values to the front. This often creates more questions than there are answers. In addition, this data serves as a basis for the automatic systems and we are continually working on improvements, optimizations and, from time to time, small revolutions. Documenting this externally would be time-consuming and does not make sense.
In case of problems, our technicians have tools with which they can quickly and easily evaluate the data from the lines, those in the neighborhood or all of the DSLAM remotely (like me and the 2nd level do) or on site. But in the end, the only thing that helps is on-site measurement with the necessary instrument. For example, you can remotely use HLOG (the signal strength is measured across the entire frequency spectrum) to see whether there are dips in one or more areas and thus conclude that there is a BridgedTap. Based on the frequency where it is noticeable, you can also use formulas to determine the distance between the router and the source of the interference. Then there are the harmonics, which are particularly important given the large spectrum of g.Fast. But the problem can only be solved on site by measuring the incoming power and cable quality on the UP and comparing this with the data in the router and checking the cables and sockets manually.
And yes, each BBCS customer (ISP) has a level of access to our systems. You see the line values, sync mode, profiles, etc. and can set stabilization yourself via the TNM profile or remove it. If you have a major problem, open a ticket with us and we will solve it.
Roger G.
Swisscom (Schweiz) AG, Product Manager Wireline Access
@Roger G: Thank you for the detailed explanation! Exciting insights - I hope others can benefit from them too. I realize that the analysis of the spectrum looks cool (to me), but ultimately the nerd doesn’t know where to look in order to draw concrete conclusions from the Fourier analysis. I imagined it to be simpler at the beginning…😉
A long time ago I had a measuring device in my hand from a coax cable network operator. With which the line and the interference on the line can be measured (peaks at certain frequencies). Some pointed out defective switching power supplies in the amplifiers, others pointed out other sources of interference, which I no longer remember. 😁
Massively, beautiful Aabig!
🙋♂️