MySql problem

Hi /prog/,

A MySQL noob needs some help here. I tried searching everywhere but it seems I cannot formulate my search expression correctly(English is not my first language). So the problem is. I want to limit the values that can be inserted in a column to certain possibilities. For example: I have a column phone_type and I want the only possible values there to be Work, Mobile, General and Fax. Any ideas? Sorry if this is too simple!

English is not my first language
that's no excuse for being lazy.
^{http://lmgtfy.com/?q=mysql+enum+type&l=1}
now, back to /b/, please.