The statement 'On Genesys Cloud CX, the DNIS can only be a number or a Genesys Cloud CX user name.' is false. DNIS (Dialed Number Identification Service) is typically associated with numbers, but Genesys Cloud CX, an advanced contact center platform, supports multiple forms of DNIS, including numbers, user names, and potentially SIP addresses or devices. Therefore, it is not limited to just numbers and user names.