# Glossary

This page details terminology used throughout this documentation.

- **Citizens Broadband Radio Service Device (CBSD)**: A physical device that can transmit in the CBRS band after it receives authorization from a SAS. Examples include a cell phone base station or an eNodeB.
- **CBSD grant status**: Grants have one of the following states: granted, authorized, suspended, or terminated.
- **CBSD ID**: The unique identifier for a CBSD. It's composed of the CBSD's FCC ID and serial number.
- **Spectrum Access System (SAS)**: A cloud service that controls the operating parameters of CBSDs to ensure the protection of higher-priority users.
- **Certified Professional Installer (CPI)**: The person who validates the installation parameters of certain types of CBSDs and provides them to a SAS. The SAS validates this person's CPI identity and certification before they're allowed to provide CBSD installation parameters.
- **Customer account (Customer)**: The resource under which all other resources are created for a SAS customer. A SAS customer is a company that has a direct commercial contract with Google for SAS services.
- **User ID**: The unique identifier for the owner/operator of a CBSD.
- **FCC ID**: The FCC identifier associated with a CBSD, which indicates that it has been certified by the FCC.
- **Serial number**: A unique identifier assigned to a particular CBSD by the manufacturer.