Cisco 700 series, Руководство по установке

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C H A P T E R
Concepts and Descriptions 6-1
6
Concepts and Descriptions
This chapter provides technical explanations of many of the features of the Cisco 700 series
router. Although this information is not required to successfully install the router, it might
be of interest and assist with troubleshooting efforts.
Definition of Terms and Acronyms
This section defines some networking terms you will encounter when gathering required
information and using Cisco 700 series router manuals to configure the router.
Access code
A number that must be dialed preceding the telephone number to dial outside of a
specific telephone system, such as a Centrex system.
AT commands
ATtention commands (used for modem communications)
BT
British Telecom
Challenge Handshake Authentication Protocol (CHAP)
A form of PPP authentication that requires an exchange of user names and secrets
(encrypted passwords) between two devices. This security feature is supported on lines
using PPP encapsulation. CHAP passwords are called
secrets because they are sent
encrypted. Both devices must support PPP.