CUCM Digit Manipulation Order of Operation

Digit manipulation can be applied at different levels during call routing process. As the call is being processed, the order by which digit manipulation applied is as follow:

You can see that the closer to the gateway, the higher the precedence of the manipulations. It is important to remember that if you manipulate on RP without modifying RL-RG manipulations (left them as default values), RP manipulations will take effect. If you modify any parameter in RL-RG manipulations (even if one), RP manipulations will be fully ignored. Same is applicable with Xformation Patterns and RL-RG manipulations.

Example#1

Let's assume that you changed 'Calling Party Transform Mask' under RP > Calling Party Transformations and changed 'Called Party Number Type' under RL-RG > Calling Party Transformations, in this case all settings under RP > Calling Party Transformations will be ignore including 'Calling Party Transform Mask'. The settings  under RL-RG > Calling Party Transformations will be used even the empty one for 'Calling Party Transform Mask'.

Example#2

Let's assume that you changed 'Calling Party Transform Mask' under RP > Calling Party Transformations and changed 'Called Party Number Type' under RL-RG > Called Party Transformations, in this case all settings under RP > Calling Party Transformations will be used and all settings under RL-RG > Called Party Transformations will be used.