Lee Roberts wrote:
> 
> Never heard of them. What are they?

www.whatis.com

Communication and Networking Riser

Communication and Networking Riser (CNR), which was developed by Intel,
is an open industry standard for a scalable riser card, which is a
hardware device that plugs into a motherboard and holds chips for
functions like modems and audio devices. The CNR architecture, and
electrical, mechanical, and thermal requirements of the riser interface
are defined in the specification. 

The specification was developed for products used to implement low-cost
local area network (LAN), modem, and audio subsystems and supports
broadband, multichannel audio, V.90 analog modem, Home PNA, and
Ethernet-based networking, and can be expanded upon to meet the
requirements of developing technologies, such
as DSL. In addition to cost benefits, CNR has the capacity to minimize
electrical noise interference, through physical separation of
noise-sensitive elements from the motherboard's own communication
systems. 

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