Glossary
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
H
HUB/NO HUB button
The nonvolatile storage that can be electrically erased and reprogrammed so that data can be stored, booted, and rewritten as necessary.
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
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. |
Cisco 800 Series Routers Hardware Installation Guide
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