Unified messaging is legacy
VoIP Loop blogger, Blair Pleasant, asks Is Unified Messaging Still Relevant?
There is a premium for UM [unified messaging] over plain voice mail, plus the integration costs can be not insignificant. And then there's the integration issues -- UM isn't generally plug and play. And lastly, the ever-present ROI [return on investment] issue -- ROI for UM has been very difficult to prove.
Additionally, in its purest form, UM (a single mail queue for email , voice mail and fax messages) has never lived up to its heyday hype. - more -