Cisco CISCO881W-GN-A-K9 Hardware Installation Guide - Page 64

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 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 ISDN Digital Subscriber Line. A digital communication protocol that uses an ISDN line and supports line rates up to 144 kilobits per second (kbps). 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. GL-2 Cisco 800 Series Routers Hardware Installation Guide 78-5373-04