Cisco Spaces uses generic Bluetooth Low Energy (BLE) beacons rather than one proprietary beacon type. It can detect and process beacons from multiple vendors and is broadly protocol-agnostic.
Note that the information on the Cisco Spaces is wrong, confusing and almost certainly written using AI. Bluetooth TAGs, also known as beacons, are a subset of Bluetooth devices, not a separate thing.
We recommend you use beacons with the iBeacon protocol as this is supported in the widest selection of beacons. The Cisco technical area shows how to include the beacons.