One or more third party channel drivers interface with a centralized communication application server. An aggregate channel driver (ACD) is included in a channel driver to implement commands and command parameters that are supported by a particular core channel driver (CCD), but not by the communication server. The ACD can also implement events and event parameters that are supported by a particular communication server, but not by the CCD. A customer can thus include the ACD to extend and/or overwrite the functionality of a channel driver without rewriting or modifying the CCD.