ISDN connections Installation of the ISDN Cards Preparation of the SX2 QuadBRI before insertion PCM bus connection
PCM bus connection
The SX2 QuadBRI / SX2-express QuadBRI has two 20-pole jacks for connection with an optional PCM cable.
Fig. 13-2: PCM connection of SX2-express QuadBRI
The upper jack is the output, the lower jack the input. Connect the SX2 cards with the PCM cable, by connecting the output jack of one card to the input jack of another card.
Please keep in mind that the connection cable differs between both SX2 boards ( SX2 QuadBRI or SX2-express QuadBRI). A mixed operation using both card types in one computer is not supported.