What is Forced Authorization Codes in CUCM ?

--> Forced Authorization Codes (FAC) is another method of implementing call restriction in Voice networks.

--> Forced Authorization Codes (FAC) requires a user to enter a code or PIN before to the call being connected.

--> Forced Authorization Codes (FAC) restrict outgoing voice calls to particular numbers.

--> Forced Authorization Codes (FAC) allows a user to place the voice call to Particular numbers from the different phone which does not have permissions by entering FAC.

--> However, the primary function of Forced Authorization Codes is call accounting and billing.

--> Forced Authorization Codes (FAC) are applied to route patterns in CUCM.

--> When a user calls to a number which uses a route pattern that requires Forced Authorization Codes, he will hear a tone prior to entering the code.

--> Once the user enters the correct code, the call is allowed and that call is specifically marked in call records with the Forced Authorization Code used.

--> Each and every Forced Authorization Code is associated with authorization level and is a number between 0 and 255.

--> We have to mention the authorization level while configuring route patterns with Forced Authorization Codes (FAC).

--> The call will be only allowed if  If the authorization level of the code entered is higher than the authorization level set on the route pattern.

--> Basically Forced Authorization Codes (FAC) will be applied to force users making calls to International numbers.

Ref: Cisco.com

Md.Kareemoddin

CCIE # 54759