What is Call Barring

I want some information on Call Barring I want to barred my outgoing call can some one help me..

Thanks

Call Barring allows you to bar incoming and outgoing calls using a four-digit password selected by you. This is a security measure to prevent the possible misuse of your cellular phone. This feature will work only if the Call Divert feature is de-activated. You can selectively bar all incoming calls or all outgoing calls as well as outgoing ISD calls. You cannot selectively bar outgoing STD calls. This is a handset dependent feature. Refer your handset mannual for more details.

Which phone you are using Harshit ?

I am using Nokia N73 in that i want to bar outgoing call can you help me in that.

Thanks