Maximum precedence levels are assigned to Classes of Restriction (COR).
Procedure
Enter change cor n, where n is the number of a specific COR.
Click Next until you see the Maximum Precedence Level and MLPP Service Domain fields.
In the Maximum Precedence Level field, type one of the following values:
fo (Flash Override)
fl (Flash)
im (Immediate)
pr (Priority)
ro (Routine, the default value)
In the MLPP Service Domain field, type a number from 0 to 16777215.
This number defines the service domain for users and trunks to which this particular COR is assigned. The system uses the service domain to create a group of MLPP users or facilities, within which precedence calls can be made.