Optional additional package for all ES communication systems (with current release status)! Scope of services: enables the activation of 3 internal boxes for receiving faxes, which can be freely allocated via call distribution. Includes fax to mail function for sending the received message as a PDF file to a desired destination address. System expansion to up to 3 (ES 5xx up, ES 54x and ES PURE-IP) / 6 (ES 6xx, ES 7xx, ES 7xx plus) fax boxes possible!