What You Will Learn
After reading this chapter, you should be able to
Previous chapters in this book walked you through the migration from a traditional telephony network (that is, based on a corporate private branch exchange [PBX] system) to a Voice over IP (VoIP) network, where voice packets travel over a data network. However, the story doesn't end there. In order for VoIP telephony systems to compete with well-entrenched legacy telephony systems, VoIP must offer much more than just the ability to place a phone call.
Today's PBX users expect features such as voice mail and conference calling. Some businesses use large call centers for their customer support departments. Therefore, VoIP technologies must step up to the challenge and not only match existing supplementary features, but exceed those features.
Fortunately, Cisco offers a suite of value-added enhancements to its basic Cisco CallManager-centric voice solution. This chapter delves into several applications you might consider in your design, beginning with the VoIP answer to voice mail.