HMR to remove a prefix on dialled number in combination with a local-policy rule

Hi,

 

I am working on a project where I need to send some specific calls from a Genesys platform via a NN4500 SBC to a specific Cisco AS5400 GW, in order to differentiate these calls from others crossing the platform the dialled number will have a prefix added to the front of the number by the Genesys call servers.

 

I then plan to use a local-policy rule for that prefix to send it to a specific session-group which contains the GWs that will handle these specific calls only.

 

I also need to create an HMR that will remove the prefix from the number so that it can be handled correctly at the GW as otherwise it is invalid. My question is where should I be looking to do this?