Distributed Mind Protocol
More commonly called the Mind Meld, the DMP forms a wireless corpus callosum that bridges two physically separate brains. When connected this way, those brains form a single sophant consciousness with aspects of all the contributing brains. The 'individual' dies, becoming a set of skills, behaviours, and motivations in the larger mind. This is distinct from telepathy.
The Tetras and other networked aliens have distributed minds, connected by radio, electrical fields, and magnetic fields. One human has the inherent capacity to use this communication method. Biggs was the first AI to use it to meld minds - with Droo. Later
Tetrapods and other clusters use a separate Inter-cluster Protocol to communicate between minds. This is a much richer interaction than metaphorical programming interfaces, but does not feel completely foreign to someone with metaphorical programming skills.