This is some few step I found in Microsoft Office website.

The Import and Export Wizard in Outlook makes it easy to import contact
information from an Excel worksheet (worksheet: The primary document that you
use in Excel to store and work with data. Also called a spreadsheet. A
worksheet consists of cells that are organized into columns and rows; a
worksheet is always stored in a workbook.) into your Outlook Contacts folder.

1. In Outlook, on the File menu, click Import and Export.
2. Click Import from another program or file, and then click Next.
3. Click Microsoft Excel, and then click Next.

(I cant continue after the third step, outlook require me to insert a
installer to install translator to continue, I had tried insert MS Office CD,
but cant)

4. In the File to import box, browse to find the Excel file (.xls) that
contains the content you want to import.
5. Click one of the following:
Replace duplicates with items imported
Allow duplicates to be created
Do not import duplicate items
Click Next.
In the folder list, click the Contacts folder where you want the imported
contact information to go, and then click Next.
To add or remove fields to determine the way the contact information is
saved in the new imported file, click Map Custom Fields.