Which functionality is enhanced by the Voicemail Pro in the IPO system?

Voicemail Pro enhances the IPO system primarily through its advanced voicemail features and call handling capabilities. This includes a range of functionalities that improve how voicemail is managed and accessed, offering users a more sophisticated experience compared to basic voicemail systems.

For instance, Voicemail Pro allows for customized voicemail greetings, voicemail-to-email features, and advanced call routing options based on the user's availability or preferences. This not only provides flexibility in managing voice messages but also integrates with other communication tools, enhancing overall user experience and workflow.

While the basic voicemail storage might be a feature of the standard voicemail system, it does not encapsulate the extensive capabilities provided by Voicemail Pro. Similarly, fax sending capabilities and network firewalls are not relevant to voicemail functionalities and don't fall under what Voicemail Pro specifically enhances in the IPO system. By focusing on advanced features and call handling, Voicemail Pro significantly improves the effectiveness and usability of voicemail within an organization.