Branch Office Branch Office gives 8x8 phone system administrators the ability to segment extensions on their PBX into groups that can represent physical or virtual branches of your company. Branch Office is an optional add-on feature to 8×8 Virtual Office business phone service. It helps you segment your 8×8 virtual PBX into groups of extensions that represent physical or virtual branches of your company. This results in better caller experiences and easier, more efficient call management. Each branch has its own unique branch directory and IVR script for easy name/number search and branch-level presence management. Branch Office also allows you to customize the “zero-out” function, giving you more options for routing calls to other extensions besides just the receptionist at the primary location. For example, you can set it up so that callers into a specific branch are sent to the branch receptionist instead of the headquarters receptionist if they dial zero. The Branch Office feature is especially useful for systems with multiple auto attendants or for businesses using the 8x8 Switchboard Pro app.