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.