The EDT Combo is a mezzanine board that pairs with a PCI/e main board for complex user-defined applications such as telecommunications network monitoring or telecommunications switching. The board pair transfers serial telecom or ECL data at high speed via a 66 MHz 32-bit PCI. Versatile access to host memory is via the fast DMA controller. Sixteen independent DMA-to-host channels, two large synchronous static memory banks or one memory bank up to 1 GB memory, and Xilinx FPGA are provided by the main board. FPGA configuration files are available. This E1/T1, E3/T3, ECL interface card has sixteen E1/T1 line interfaces, four E3/T3 line interfaces, and sixteen ECL differential inputs and outputs. Output data is synchronized by an external LVDS clock.