
84 Chapter 5 Configuring application resources
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Signaling channels
Signaling channels are the communication channels used to send control signals to and from the
MSC. You must have one signaling channel for each connected device and enabled feature port.
The number of signaling channels on your system determines the number of devices that you can
connect and feature ports that you can enable on your system. Signaling channels are also known
as D-channels.
Media channels
Media channels are the communication channels used to send voice and data information between
the devices and feature ports. Media channels are required only when a device or feature is sending
or receiving voice or data information. For this reason, the devices and feature ports can share
media channels.
The number of media channels you have determines how many devices and feature ports can
exchange voice and data information at the same time. Media channels are also known as
B-channels.
DSP resources
Digital Signal Processors (DSP) provide the voice processing functions on BCM. Voice
processing is required to convert voice information to and from digital format for voice mail,
Contact Center and IVR. Voice processing is also required to handle encoding and decoding of IP
telephony calls. The DSPs are located on the MS-PEC cards installed in your MSC.
The number of DSP resources you have determines the number of voice mail ports, contact center
ports, Fax mail ports, IVR ports, IVR Fax ports, WAN connections, and IP telephony calls that can
be active at the same time.
Voice bus paths
The voice bus paths are the communication channels between the DSPs on the MS-PECs and the
master DSP on the MSC. One voice bus path is required for each voice processing task that is
operating on the DSPs.
There are 62 voice bus paths available on BCM.
Media gateways
Media gateways are logical connections that are a combination of DSP resources, media channels,
and voice bus paths that provide protocol translation between IP telephones and trunks and analog
and digital telephony devices.
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