What happens to calls if the CID rules are misconfigured in 3CX?

When Caller ID (CID) rules are misconfigured in 3CX, the most likely outcome is that calls may be displayed incorrectly. These rules dictate how the Caller ID is presented to recipients, and if there are mistakes in the setup, the CID shown could be erroneous or not in the format expected by the endpoints or service providers. This misconfiguration can lead to confusion for the call recipient, as they might see an incorrect number or no number at all, affecting trust and recognition of the calling party.

The other possible outcomes mentioned, such as calls being rejected, outgoing calls failing, or extensions not registering, are typically not direct consequences of CID misconfiguration. Rejections and failures usually point to issues in network configuration or registration status, whereas registration problems usually indicate a need for addressing network settings or credentials, rather than CID rules. Thus, it's essential to ensure that CID rules are correctly set up to avoid misleading call information.