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and Telephone. An international organization responsible for
developing telecommunication standards.
CD. Carrier Detect.
CHAP. Challenge-Handshake Authentication Protocol. Security
protocol in PPP that prevents unauthorized access to network
services. See RFC 1334 for PAP specifications Compare PAP.
client. Network node that requests services from a server.
CPE. Customer Premises Equipment. Terminating equipment
such as terminals, telephones and modems that connects a
customer site to the telephone company network.
CO. Central Office. Typically a local telephone company facility
responsible for connecting all lines in an area.
compression. Operation performed on a data set that reduces
its size to improve storage or transmission rate.
crossover cable. Cable that lets you connect a port on one
Ethernet hub to a port on another Ethernet hub. You can order
an Ethernet crossover cable from Motorola Netopia®, if
needed.
CSU/DSU. Channel Service Unit/Data Service Unit. Device
responsible for connecting a digital circuit, such as a T1 link,
with a terminal or data communications device.
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data bits. Number of bits used to make up a character.
