Communication and Networking Riser
Communication and Networking Riser (CNR) is a term from the PC hardware sector. CNR is a special slot on the motherboard (Engl. Mainboard ) of a personal computer , in the corresponding expansion cards can be inserted.
CNR is an industry standard that was developed by Intel to set up components such as modem , network or chip access on a computer. The cards are no longer widespread today, as most of the functions for home users are already provided by onboard chips (e.g. Ethernet LAN) or an external modem.