Link Me Up!

Bluetooth systems are composed of both a radio chip and a controller
that uses what is called link manager (LM) software to control link
setup, authentication, and link configuration (Figure 2.5).
The hardware for the link manager is the link controller (LC) that
executes the following actions:
1. Sending data
2. Receiving data
3. Authentication
4. Establishing connections
5. Establishing link types
6. Determining the packet frame type
7. Paging
8. Inquiries
9. Setting a device in sniff or hold mode