it seems that it is possible to synchronize your line at 120/40 Mb/s (ATM) on a VDSL 2 connection (non. G.Fast), I am personally synchronized at 111/27 Mb/s (ATM) with a line 30m long and an SNR montant/Descending of approx. 16dB.

Question, how can I ask Swisscom to push this synchronization to its maximum given the quality of the line 3.5 dB attenuation and SNR at 16dB, a 100/100 or 150/50 would be perfect. I need more upload speed.

Support is not responding….

@zorglub1

So in your opinion we should contact the technical service to see if higher flow rates are possible?

Or maybe I misunderstood your explanation?

Yes and no, I would say that it will depend on the characteristics of your line if it synchronizes at 100/20, your attenuation is around 5dB and your SNR is greater than 15 so I think that potentially there is a technical possibility of ’have a tad more on this one. Apart from these line conditions I’m sure you will be thrown out by the technical service.

Why would it be possible to have more on a short line? Because by default it is the VDSL2 17a (17 MHz) profile which is activated. This corresponds to the bandwidth allocated for signal transport. The VDSL2 standard includes 2 higher profiles, 30a and 35b, respectively 30 and 35 MHz allowing higher speeds to be achieved. The 30a which is validated by Swisscom allows you to have a speed of 200/100 Mb/s… as if by chance…

I haven’t called about my case yet but will do so tomorrow.

At home, instead of 200/100, 130/30

zorglub1

Indeed I am limited by the signal to noise ratio, a technician came to see the problem 3 years ago when the FTTB and the mCan were not yet installed, I had already changed the pair between the input distributor and the technical room, as well as between the technical room and the central office. Because when he took measurements there was a lot of loss between the input distributor and the technical room (I had 40 Mb of difference between what the checker said and my sync). In short, quite a story, but since he changed me, everything was better and the sync was much higher.

But according to him it must be that the telephone lines must pass near large cables, already in the technical room, there are electric meters, UPC amplifiers, the Swisscom copper + fiber arrival without forgetting and that I I think it doesn’t help either and placed next to the Swisscom transfer strips, the control boxes for the building’s ventilation with large transformers inside…

The entire FTTB and fiber part was installed in the stroller room, because there was no more space 🙂

Interesting and thanks for sharing experience and @StevenB

What are the values ​​displayed in the checker for your line?

Currently at home; 111/40 instead of 200/100!

zorglub1

But you’re welcome with pleasure.

I get 2 different values ​​depending on whether I choose to enter my landline number or my address.

I have

Test with my phone number:

Test with my address:

So I have more flow than what the checker tells me

Thank you for this information, I was convinced that we were limited to the speed indicated in the checker, the fact that the lines synchronize higher (especially in upload) gives some hope. On the other hand, the speed of synchronization of the routers is essential because it sets the maximum speed. I tried to go down to Internet S yesterday evening, my synchronization did not change; but my download speed was restricted to 50, on the other hand the upload remained at 25 as now.

I’m going to try it with the hotline this morning, because now it’s the cross and the banner to get technical people. Teleoperators have almost no means of action.

Suddenly I am abroad, my connection that I have at home is 100/20 so now I would have 200/50?

@LeeoModzZ

As long as your synchronization and therefore your line supports it, otherwise you will be at the maximum of your synchronization

Return of my call to support, shortened version without intonations:

Me Here I present my case to you….

Support Sorry sir, we understand what you are saying; but our systems say you can’t get better.

Me But….

Support No really sorry

Me Not as much as me, so nothing is possible on your side.

Support No nothing

Me Thank you and have a good rest of the day.

Nada race results and zero hope.

I also called this morning;

Before the call: 140/40

After the 120/40 call

BBCS measurement:

The following result shows the probable bandwidth maximum technical bandwidth, which can be made available for the connection examined. It should be taken into account that the values ​​apply from entry into the building and that domestic installation may cause a reduction in bandwidth.

VDSL:100,000 Kbps downstream / 28,000 Kbps upstream

In fact you shouldn’t have called

Or I’m angry because you still have 40Mb/s upload…

Well what I was able to discover during the call is that the status of my line is not clear, in their database I am still on a long line (on the exchange) even though I am actually connected to the microCAN. As the municipality’s migration is not yet completely complete, it is possible that my upload could evolve once the transition is complete.

That’s the optimistic side of me… always hoping.

According to my contract with Swisscom, rated internet speeds can reach up to 200/100. I hope this is not a false statement!

For the moment I have not received any communication from them to inform me of the specific reasons why in my case these values ​​cannot be achieved.

The difference between the Swisscom measured values ​​and the nominal values ​​indicated by Swisscom are too large. Swisscom must do everything to bring its promises into line with reality.

Good morning

concerning the new flow rates (200/100 instead of 100/20)

I’m very surprised to see no difference…

Before I had around 100/20 with the Internet Booster

Now I’m about 100/20 with the Internet Booster

It’s surprising knowing that uploading the booster allows more!

Well I continued my investigation in order to understand what limits my ATM synchronization compared to what some people observe and by connecting a device other than the Internet Box (Zyxel) I was able to display more detail which allows me to visualize useful information such as the “max achievable rate” which is the maximum possible synchronization on the line with the technical parameters defined by Swisscom and I obtain:

\===================================== ====================================
VDSL Training Status: Showtime
Mode: VDSL2 Annex B
VDSL Profile: Profile 17a
G.Vector: Enable
Traffic Type: PTM Mode
Link Uptime: 0 day: 0 hour: 1 minute
==================================================== ====================================
VDSL Port Details Upstream Downstream
Line Rate: 27.519 Mbps 110.077 Mbps
Current Net Data Rate: 27.520 Mbps 110.078 Mbps
Trellis Coding: ON ON
SNR Margin: 12.3 dB 15.8 dB
Actual Delay: 0 ms 0 ms
Transmit Power: -19.5 dBm 13.6 dBm
Receive Power: -23.7 dBm 10.4 dBm
Current INP: 30.0 symbols 27.0 symbols
Total Attenuation: 0.0 dB 4.5 dB
Achievable Net Data Rate: 37.622 Mbps 141.941 Mbps
==================================================== ====================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 3.2 4.3 5.4 N/A N/A 2.0 4.6 7.8
Signal Attenuation(dB): 3.2 3.9 4.7 N/A N/A 1.6 4.5 7.8
SNR Margin(dB): 12.1 12.4 12.3 N/A N/A 15.8 15.9 15.7
TX Power(dBm): -30.9 -23.3 -22.4 N/A N/A 10.7 7.7 7.1
==================================================== ====================================

So I can expect 50% more throughput in upstream. On the other hand we see that the U3 and U4 carriers are not used (profile 30a) so there is still a little reserve on our non-G.Fast lines. Swisscom needs to get its act together….

How can we check if profile 30a has been activated?

The BBCS checker states the following: "The following result shows the probable bandwidth [maximum technical bandwidth](https://checker.vadian.net/check.aspx?xdsl=bxdsl%C2%AE=WSUB7EU7&lang=fr&QualByAdr= false), which can be made available for the examined connection.

VDSL: 100,000 Kbps downstream / 34,000 Kbps upstream "

This seems to correspond more to a 17a type profile!!

your opinion?