Hi,
Welcome to CGRateS,
Regarding your scenario, it can be achievable through two approaches:
1) Either you change it in the configuration in your switch that you are using (FreeSWITCH, Kamailio, OpenSIPS, etc.)
2) The other way through AttributeS subsystem in CGRateS. Here you can find the docs for AttributeS:
https://cgrates.readthedocs.io/en/latest/attributes.html#id2Feel free to reach us for any other question you may have,
Thanks,
Armir