This device in this article seems to be mainly for serving signal outside of the building. However, devices like the one you descibe exist, such as: https://piv

This device in this article seems to be mainly for serving signal outside of the building. However, devices like the one you descibe exist, such as: https://pivotalcommware.com/echo-5g/ https://pivotalcommware.com/echo-5g/ (Full disclosure, I'm a previous employee)