2.6.5 CNR slot

The Communications and Networking Riser (CNR) slot supports interface cards that integrates audio, modem, and network functionality.

The CNR specification supports interfaces including:

Audio Codec ‘97 (AC ’97) - for audio and/or modem functions

Local Area Network (LAN) - for networking functions

Universal Serial Bus (USB) - for functions implemented in the USB interface, and technologies such as broadband, DSL, and wireless

System Management Bus (SMB) - for Plug-n-Play functionality

Power - to provide the signals required for power management, and the main power supplies to operate the CNR circuitry

The CNR is tagged to replace the current Audio Modem Riser (AMR) slot because of its flexibility and added features. Also, the CNR slot does not take up the motherboard space for one PCI slot because it is a shared slot; rather, it provides you more options.


P4B-E Communication & Networking

Riser Slot

Figure 2-20 Communications and Networking Riser (CNR) Slot Location


Chapter 2: Hardware information