Is the SIP trunk terminated to an Avaya SBC-E? If so, use a SigMa script to perform this manipulation. I wrote the attached example for you. This inspects the To header and if there's a match on 2125551111, the From and P-Asserted-Identity headers are changed to static CID 2125552222.
Replace the destination and source numbers as needed. Apply the script to the SIP server in the SBC-E configuration representing the service provider. If multiple manipulations are needed, the "if" statement code blocks can be repeated. They will be checked in order. Hope this solves your problem.
Last edited by mlombardi1; 11-04-2021 at 05:51 AM.
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