Telephone fees when dialing in to oversea number

when I want to join a meeting via phone dial in to the Germany number, I can only listen to the meeting, but no one else can hear me. When dialing the (default) US number, I can listen and be heard.
What fees will be charged, if I call the US number from Germany? Will this be standard fees for US calls? What do I have to do to achieve a full two ways participation to the meeting using the german dial in number?

Thank you very much for your effort!
Best regards,

We don’t charge any fees for the service offered on Standard carrier costs apply. As for the German number not working, we can look into that!

Hello Saghul,
just to be 100% clear on this: If you say “standard carrier costs apply…” that means if I call the US number from Germany, standard fees for a transatlantic phone call will apply, correct?

Correct. Also, please re-check the German number, our carrier told me they haven’t noticed any problems recently. It might have been a transient issue.