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GL-2
Cisco 800 Series Routers Hardware Installation Guide
78-5373-04
EMI
Electromagnetic interference. The interference by electromagnetic signals that
can cause reduced data integrity and increased error rates on transmission
channels.
ESD
Electrostatic discharge. A transfer of electrostatic charge between bodies of
different electrostatic potentials, such as an operator and a piece of electrical
equipment. ESD occurs when electronic components are improperly handled
and can damage equipment and impair electrical circuitry. ESD is more likely to
occur with the combination of synthetic fibers and dry atmosphere.
F
Flash memory
The nonvolatile storage that can be electrically erased and reprogrammed so that
data can be stored, booted, and rewritten as necessary.
H
HUB/NO HUB
button
The Cisco 800 series routers provide a HUB/NO HUB button. This button is
associated with the Ethernet port on Cisco 801 and Cisco 802 routers and with
Ethernet port Ø on Cisco 803 and Cisco 804 routers. The setting of this button
determines the cable type (straight-through or crossover) that you use to connect
an Ethernet device. This button is the equivalent of the TO HUB/TO PC button
on the Cisco 802 IDSL and Cisco 804 IDSL routers.
I
IDSL
ISDN Digital Subscriber Line. A digital communication protocol that uses an
ISDN line and supports line rates up to 144 kilobits per second (kbps).
ISDN
Integrated Services Digital Network. A communication protocol that permits
telephone networks to carry data, voice, and other source traffic.
N
NIC
Network interface card. A board that provides network communication
capabilities to and from a computer system. Also called an adapter.
NT1
Network Termination 1. A device that provides the interface between equipment
on the customer and ISP premises.