sequence! { procedure, context,
    // ACL Connection Established
    Lower Tester -> IUT: IoCapabilityReq {
        transaction_id: 0,
        io_capabilities: 0x01,
        oob_authentication_data: 0x00,
        authentication_requirement: 0x01,
    }
    IUT -> Lower Tester: NotAccepted {
        transaction_id: 0,
        not_accepted_opcode: Opcode::IoCapabilityReq,
        error_code: 0x37,
    }
}