Configuring AAA for Cisco Voice Gateways Configuration Guide, Cisco IOS Release 12.4T
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Last Updated: December 15, 2011

AAA --Authentication, Authorization, and Accounting. AAA is a suite of network security services that provides the primary framework through which you can set up access control on your Cisco router or gateway.

ANI --Automatic number identification. Same as calling party.

DNIS --Dialed number identification service. Same as the called number.

gatekeeper --A gatekeeper maintains a registry of devices in the multimedia network. The devices register with the gatekeeper at startup and request admission to a call from the gatekeeper. An H.323 gateway is an endpoint on the LAN that provides real-time, two-way communications between H.323 terminals on the LAN and other ITU-T terminals in the WAN or to another H.323 gateway.

gateway --A gateway allows H.323 terminals to communicate with non-H.323 terminals by converting protocols. A gateway is the point where a circuit-switched call is encoded and repackaged into IP packets.

IFS --Cisco IOS file system.

IVR --Interactive voice response. When someone dials in, IVR responds with a prompt to get a personal identification number (PIN), and so on.

POTS --Plain old telephone service. Basic telephone service supplying standard single line telephones, telephone lines, and access to the PSTN.

PSTN --Public Switched Telephone Network. PSTN refers to the local telephone company.

VoIP --Voice over IP. The ability to carry normal telephone-style voice signals over an IP-based network with POTS-like functionality, reliability, and voice quality. VoIP is a blanket term that generally refers to the Cisco open standards-based (for example, H.323) approach to IP voice traffic.

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Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

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