@5018 ahh ok, thanks for the info (Roger G.).

I’ve known it for a lot longer than Freddy with the OTL connection, because I’m constantly on the move in the headquarters and large VT’s and overbooking is avoided up to 2.5 Gbit/s on average.

Of course I would know where to call to reach a specialist for such scenarios, but unfortunately I can’t make that public here. With the hotline it’s sometimes like a lottery game in a case like this.

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@5018 wrote:

4.: The attenuation value for Down is much too high. This means that your fiber optic cable is not completely clean somewhere

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Nope, the attenuation values ​​are fine - they are normal values ​​for

For P2P, the attenuation values ​​must be approximately identical

EDIT - it was already explained 😉

POGO 1104

This is the reception level and not the attenuation. According to the ITU standard, up to -28 dBm would be in the green range, but many ONUs are even more sensitive (even higher values ​​would work).

@foobar I can’t confirm that from practice with the -25 dB. I have had several customers with -25 to -28 dB in the DN and -20 dB in the UP. This line was very unstable and did not deliver full performance.

The dB refers to the line attenuation and not the transmission power/reception level.

No, the power level is not attenuation and, according to Swisscom quality requirements, this may be a maximum of -25dBm (XGS PONy) and -15dBm for P2P.

There is also the value 0.25dB, which actually means the maximum permitted attenuation of the fusion splice.
Yes, stupid, these are the same numbers that describe different things.

You can get confused at times.

@user109

dBm is always a power (dB related to 1 mW)

dB would be attenuation.

It is clear that it is borderline at -28 dBm… that is based on a BER of 10^-3, then the FEC often stumbles (10^-12?)

@foobar Thanks, now I see it a little more clearly.😁

Nice discussion, but doesn’t help the customer at all. You should mark it as offtopic. 😉

But it’s certainly out of the category: learned something again.

Unfortunately, I can’t see the Anschluss because @AsianCoke is not connected to a customer account and I haven’t received a response to the PM either.

And yet Guido, Roger can also do fiber, LOL 🤣

It was clear to me that you could do that, but it wasn’t clear to me whether you wanted to do that 😉

I’ll hang on here, not that it’ll get boring @Roger G 😉

I’ve also had XGS PON (10Gbit) active at home since today. I’m very likely the only one who uses glass in the area because it’s only on the 4th/5th. It was available to order in October and nobody really knew. (Expansion at the end of September) and since October 6th the marketing/activation has been stopped.

Surprisingly, I only get 1.68Gbit DS&US via the box’s speed test, values ​​seem OK. There should actually be more to it than that, any ideas?

I’ll do 1-2 additional speed tests later, but I can’t imagine that it’s due to network overload…

I would wait 24 hours. And do you use the internet box’s speed test?

Yes, IB speed test, I am aware that in the end I don’t have that much performance on my PC/laptop 😉

Am I the all-knowing oracle? LOL I passed it on for review… we’ll see.

Best regards

No, of course not, I stumbled across this thread by chance because I was just interested - thanks, work colleague, it’s not urgent at all 😉

So, the box has been online for a good week now, the values ​​are constantly the same, I actually didn’t know that the exact same values ​​were achieved several times in a row over several days in the speed test… 🤔

We’re already in the process of analyzing it, as I check the line every day. Very, very strange, everything is great in the systems. Currently it is not possible to explain what the problem is. The PON tree is almost unused, there are hardly any customers on it and if usage is only in the low 2-digit mbps range. I’m guessing it’s an SFP that isn’t doing what it’s supposed to do, but the real specialists are there analyzing.

@Era Please restart the router (it has never been rebooted since it was plugged in) and if that doesn’t help, please reset the part. Let’s see if there’s anything there 🙂

Whatever you have done now, it seems to have been done…

I did a factory reset, the first speed test from just now looks much better, and there are now certain differences between UL/DL, so I would have expected that from my Arbeitgeber from the start 🙃

I restarted the router on the day it was put into operation and even a day later, but it still didn’t work at all…

Anyway, thanks for the clarifications!