¿Qué quiere decir esto? / What does this mean?

Im trying to learn Spanish and a good way to do this is to embrace the language as much as possible.

So im going to take you on a journey where, every day ill share a randomly generated sentence in Spanish, which you will have to translate.

This way we both learn a new interesting language. One day at a time!

buena suerte!

Today’s sentence:
Debemos telefonear a la guardía.

Let me know in the comments what you thing this sentence means!