@Mohammad Alaa Alewi did this Link work for you, if you run the Speedport Smart 3 as a normal router? http://speedport.ip/engineer/html/version.html  If yes, can please you post a screenshot from the dsl information?

Yes I can use this link. I will send a screen shot. 

@Mohammad Alaa Alewi what Firmware you have at the Speedport smart 3? 010137.3.5.002.0. from 11/2019? 
How long the Router was online before you make the Screenshot?

 @Joe Doe .Yes I have the last firmware. The crc errors in download happened after like 10 minutes.

I thought the problem with the router, so I bought all-bm100vdsl2. But still the same problem.

@Mohammad Alaa Alewi i think you want/need a VDSL Router with an english user interface. Thirst I must say that I don’t have much knowledge with the Speedport smart 3. 5000 errors is much, but I don’t know what is normal for the Speedport.
I prefer to check your line with a Fritzbox 7530 or 7590. 

If you can configure a German Fritzbox 7590 I know a shop, where you can rent the box for one month for about 5 Euros. 

@Droggelbecher what you think about the stats from the Speedport Smart 3. Normal?

@Joe Doe why we want a german interface if the issue 8 have is with crc and SNR margin. I believe the fault with the socket in my wall, cable from the box to my home, or the box itself in my building.  normal crc errors like 10 to 20 . I have an obvious problem. 

@Mohammad Alaa Alewi can you made pictures from your TAE socket and post here.

Hmmm it needs  a lot of work. I will try to do it.

@Mohammad Alaa Alewi  I mean this box.

I know! But it is behind a big closet and it is heavy to be moved. Anyway I did it.

I have never seen such mounted box. The TAE connector don’t seen to old. I think the cables behind will be fine.  I am be afraid if you screw around there you have more problems.

Do you think the phone cable from the phone box downstairs to my home is the problem? I saw it and it looks like so bad. Also the box it self looks rusty.

Try to make a technical ticket over the o2 DSL App.  I know that the technical department is not happy about the Speedport Smart 3.

This is why I recommend a actual Fritzbox, because o2 rent this router to their customers.

I already tried to do so. After long time of waiting, they but me on hold for like 30 minutes, then I hang up the phone. I tried the next day and the same happened. That is why I posted here. 

HI @Mohammad Alaa Alewi 

I strongly recommend you to check if it is possible to switch your router. As @Joe Doe said before you should buy or rent a Fritzbox.

I assume after checking your connection its your hardware which causes the trouble and disconnects.

Best Matze 

P.S

Thanks @Joe Doe  for the assistance. 

@o2_Matze Hi Matze,

At first I had speedport smart 2, and I have been told to get another router  so I bought All-bm100vdsl2 from allnet and still have the same problem, then I bought speedport smart 3 and you saw the screenshot of the crc errors. I haven't bought fritzbox 7590 cuz it has no bridge- mode to connect it to my nighthawk xr700 router. My hardware is good and a lot of friends have the same as I do without any problem. Ps: I don't have a problem with download or upload speed, it is all fine. I just have high crc errors and cause heavy lag during online gaming .

Hi @Mohammad Alaa Alewi 

Are there any news ? When checking  your connections everything looks fine now? 

Best Matze 

Hi @o2_Matze,

I haven't checked after your last message 3 days ago, but I still have lag. I can't afford to buy a fritzbox 7590. Especially I changed many routers before as I mentioned before. Could you please send a technician to check the box and cable in my building? Or it is not your job and I should issue a technician ticket?

Hi @Mohammad Alaa Alewi 

In this case please call our customer service hotline via mobile from your home (close to the router),

our colleagues will create a trouble ticket with your assistance to check your DSL Port.

The free number is  08005251378 

Best Matze