Do I need to connect multiple JCT boards together with a special cable?

The Sangoma Dialogic JCT series boards have a 68-pin male connector at the top edge of the board.  When using multiple boards in a single server, you’ll use a CT Bus cable which is seated on this connector of each board.  The standard CT Bus cable has multiple “drops” (connectors), typically a minimum of 4 connectors per cable, spaced 1″ apart (which is the spacing between PCI/PCIe slots).  It is OK to leave connectors empty in the middle of the cable, or at either end of the cable.  CT Bus cables may be found here and are available in 4, 8, 12, and 16 drop variations.

Note:  The D4PCI series boards do not use a CT Bus connector/cable.