/mcpConfiguration Limitations for Capacity Planning The Cisco IP Voice Media Streaming application and Self Provisioning IVR services use a media kernel driver to create and control Real-time Transfer Protocol (RTP) streams. This media kernel driver has a capacity of 6000 streams. These streams allow the media devices and IVR to make resource reservations. These reservations are based on the following capacity calculations: Capacity Media Device (Call Count service parameter) * 3 Where 3 indicates total of receiving (RX) and transmitting (TX) calls for endpoint and 1 for .wav file. Annunciator (Call Count service parameter) * 2 Where 2 indicates total streams of RX and TX endpoints. Software Conference Bridge (Call Count service parameter) * 2 Where 2 indicates total streams of RX and TX endpoints. Software Media Termination Point ((Maximum Half Duplex Streams) * 3) + (501 * 2 * [number of enabled MOH codecs]) Where: • (Maximum Half Duplex Streams) is a configuration setting on the MOH device configuration administration web page. • 3 indicates total steams of RX, TX, and greeting announcement .wav file. • 501 indicates the maximum number of Music On Hold (MOH) sources. • 2 indicates music .wav stream and possible multicast TX stream. • [number of enabled MOH codecs] is based on how many MOH codecs are enabled in the Cisco IP Voice Media Streaming application service parameters. Music On Hold (500 * 2) Where 500 indicates callers, and 2 indicates total streams from RX and TX streams. Self Provisioning IVR Service Hence, to enable MOH to support a maximum of 1000 callers, use the following equation: 1000 * 3 + 501 * 2 * 1 = 4002 driver streams with one enabled codec and 1000 * 3 +501 * 2 * 2 = 5004 with two enabled codecs. Reduce the remaining devices and deactivate the Self Provisioning IVR service to limit total reservations to 6000, which allows the MOH device to make these reservations. It may also require that you do not activate the Self Provisioning IVR service on the same server with Cisco IP Voice Media Streaming application. If configuration settings of the media devices exceed the capacity of the media device driver, the media devices that register with the device driver first will be able to reserve their required stream resources. The media devices that register later are restricted to fewer than requested stream resources. The later registered media Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 618 Custom Features Configuration Limitations for Capacity Planning