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AMR
AMR stands for Audio Modem
Riser. CNR or Communications and Networking Risers
also belong to this category. An AMR is a card that supports a sound
or modem function. AMR and CNR are not expansion cards or expansion
buses in the ordinary sense. These are dedicated connectors
for cards specific to a particular motherboard design. AMR and CNR
cards are not general-purpose devices the way a PCI card is.
An AMR is used in place of a normal
“hardware modem”. The AMR is an interface between the motherboard
and a phone line. It relies totally on the CPU and has no secondary,
built-in processing ability. AMRs are inexpensive and easily upgradeable.
If you plug an AMR device in rated for 28K modem speeds and want to
upgrade to 56K, all you would need to do is go to the manufacturer’s
site and download the proper driver and the upgrade would be complete.
While AMR is cheap and easy, it is not a particularly reliable technology
(you get what you pay for). A hardware modem, which does have built
in processing abilities, is a better buy and provides service that is
more reliable.
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CertiGuide to A+ (A+ 4 Real) (http://www.CertiGuide.com/apfr/) on CertiGuide.com
Version 1.0 - Version Date: March 29, 2005
Adapted with permission from a work created by Tcat Houser et al.
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