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MSP FX S/O 2-24-Line PCM Interface
The MSP-FX S/O PCM interface is a general-purpose PCM interface for host-based telephony media processing.
It allows the BladeWare user to interface with office trunks (FXO), PBX station trunks, and to support
fax terminals and analog phone “behind” the system.
The MSP-FX S/O is a half-height PCI or PCI Express board with 2, 4, 6… to 24 ports using one
expansion-card slot. Each card has either two or four ports, depending on the number of two-port
daughter cards included. The daughter-cards can be either station or office-trunk interfaces in any
combination. Expansion beyond four ports is accomplished by interconnecting up to six boards via a
micro-backplane connector (as shown below). Additional power for configurations beyond 8 ports or station
interfaces require that the host PC’s 12-volt power supply be connected via a standard power cable.
Since all 24 ports are part of the same assembly, all ports operate on the same PCM clock.
The board includes codecs with the low-distortion characteristics needed for high-speed modems, such as
Commetrex’ V.34 fax modem. The PCM data are buffered and transferred to the host PC via an efficient PCI or
PCI Express plug-and-play interface.
The MSP FX S/O is also available with the optional OpenMedia media-processing software environment.
OpenMedia is a comprehensive multi-stream software environment that permits the user to efficiently develop
host-based signal-processing functions.
Easily develop proprietary media processing technologies
System Overview The MSP FX S/O is optimized for applications requiring from 2-to-24 analog line interfaces. PCM data are managed by a PGA and transferred between the board and the host computer over a PCI or PCI Express plug-and-play interface.
Analog Trunk Interface
The MSP-FX S/O includes up to 12 two-port daughter cards that provide either station or office trunk
interfaces in any combination. The interfaces use the industry-leading Silicon Labs ProSLIC series of
interface circuits. Notable features include SiLabs patented capacitive isolation for 5,000 volt isolation on office trunks and an internal ringing power supply that generates 90 volts peak from a single 3.3 or 5 volt supply.
