Hello @Mirza Junuzovic  and welcome to our o2Commuity,
can you log into your FritzBox and upload the DSL line values here? There is probably a problem in the wiring of your telephone connection, such as a second telephone socket or the use of powerline adapters. This can often be seen in the FritzBox data.
 

greeting

translated with the help of google ;-)

What exactly do you want me to put here, I don’t really understand, sorry?

For this you have to log in under http://192.168.178.1/ and upload these 4 screens from  > Internet > DSL information < here.

Hello @Mirza Junuzovic,

These disconnects can have many different causes. Have you already checked the wiring for loose contacts and defective cables? Please do not use any extension cables or multiple sockets and only use the original cables if possible. If you are using a repeater or powerline adapters check if it is working fine without.

Please also try if a power reset helps. Therefore unplug the router for a few minutes. If the interruptions occur again, please call our technical support on 08005251378 (free of charges). As not all of our staff speak English, it might be helpful to call with someone who can translate for you.

If you have any further questions, please let us know.

Best regards

Giulia

Hello @Mirza Junuzovic,

I wanted to ask again whether the problems have been resolved in the meantime or whether you still need support from us. We will be happy to help you with any questions.

Best regards

Giulia

I still have problems, today we haven’t got connection from 10h until 15h I don’t know what’s happening..

Hello @Mirza Junuzovic,

I'd be happy to take a look at your case and see how we can help. I sent you a private message to exchange data.

Best regards

Giulia

Hello @Mirza Junuzovic,

since I unfortunately didn't get any feedback from you so far, can I assume that the problem has been solved in the meantime?

Best regards

Giulia