Acronym for
Communication and Networking Riser. Developed by
Intel, CNR is a riser card for
ATX family
motherboards that was developed in order to reduce the cost to
OEMs of implementing
LAN, home networking, audio and modem subsystems widely used in modern connected PCs. The CNR Specification is an open industry specification that defines a scalable motherboard riser card and
interface that support the audio, modem, and network interfaces of core logic
chipsets. The specification is supported by OEMs, Microsoft and silicon suppliers. The specification defines the CNR architecture for both standard and low-profile risers and includes electrical, mechanical, and thermal requirements of the riser interface. In addition to supporting current technologies such as
Ethernet and analog modems, the specification can be expanded for developing technologies, such as DSL.
