Service Broker
The service broker is located on the edge of the service providers service network and provides the service distribution, coordination, and control between application servers, media servers, call agents, and services that may exist on alternate technologies (i.e. Parlay Gateways and SCP s). The service broker allows a consistent repeatable approach for controlling applications in conjunction with their service data and media resources to enable services to allow services to be reused with other services to create new value added services.
Application Server
The Application Server is located in the service provider’s network and provides the service logic and execution for one or more applications or services that are not directly hosted on the Call Agent. For example, it may provide voice mail or conference calling facilities. Typically the Call Agent will route calls to the appropriate application server when a service is invoked that the Call Agent cannot itself support.
Media Server
This Media Server is located in the service provider’s network. It is also referred to as an announcement server. For voice services, it uses a control protocol, such as H.248 (Megaco) or MGCP, under the control of the call agent or application server. Some of the functions the Media Server can provide are
- playing announcements
- mixing – providing support for 3-way calling etc
- codec transcoding and voice activity detection
- tone detection and generation
- interactive voice response (IVR) processing
- fax processing.
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