/mcpMedia Termination Extensions The media termination feature allows applications to transmit and capture the bearer of a call, for example, audio or video. This action sometimes gets referred to as “rendering and recording” or “sourcing and sinking” media. It remains distinct from call control because media termination concerns the data that flows between endpoints in a call, not the details of setting up or tearing down calls. For example, an automatic call distributor (ACD) uses call control to route calls among available agents but does not terminate media. An interactive voice response (IVR) application, on the other hand, uses call control to answer and disconnect calls and uses media termination to play sound files to callers. Although no telephony applications are solely interested in media termination, this feature always gets used in combination with call control. JTAPI 1.2 primarily represents a call control specification and offers very limited support for applications that require media termination. Because the Cisco Unified Communications Solutions platform supports media termination to a much greater degree than JTAPI standard, the Cisco Unified JTAPI implementation extends JTAPI to add full support for this feature. In Cisco Unified JTAPI, software-based media termination occurs by using Computer Telephony Integration (CTI) ports. They include one or more lines (dialable numbers) that can be used to originate or receive calls. They however need a controlling application to provide the source and sink of the media. An application registers its interest in the media termination port with the Cisco Unified Communications Manager. The Cisco Unified Communications Manager then delivers all the events that relate this virtual device to the application. InCisco Unified JTAPI, CTI ports get referred to as CiscoMediaTerminals. The following figure shows the CTI port configuration. For details about administering and configuring a CTI port, refer to the Cisco Unified Communications Manager Administration information. Figure 8: CTI Port Diagram To implement a softphone application (where the PC acts as the telephone set, for example), the Cisco Unified JTAPI application would manage a CTI port. Message Waiting Indicator Enhancement The Enhanced Message Waiting Indicator (MWI) feature enables applications to provide the following message counts to be displayed on phones that support the enhanced message waiting counts: • Total number of new voice messages (includes normal and high priority messages) • Total number of old voice messages (includes normal and high priority messages) • Number of new high priority voice messages • Number of old high priority voice messages • Total number of new fax messages (includes normal and high priority messages) • Total number of old fax messages (includes normal and high priority messages) Cisco Unified JTAPI Developers Guide for Cisco Unified Communications Manager, Release 15 and SUs 122 Features Supported by Cisco Unified JTAPI Media Termination Extensions