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Introduction
14 4600 Series IP Telephone LAN Administrator Guide
Terms Used in This Guide
802.1D
802.1Q
802.1Q defines a layer 2 frame structure that supports VLAN identification and a QoS
mechanism usually referred to as 802.1D.
802.1X Authentication method for a protocol requiring a network device to authenticate with a
back-end Authentication Server before gaining network access. Applicable 4600
Series IP telephones support IEEE 802.1X as a Supplicant with the EAP-MD5
authentication method.
ARP Address Resolution Protocol, used, for example, to verify that the IP address
provided by the DHCP server is not in use by another IP telephone.
CELP Code-excited linear-predictive. Voice compression requiring only 16 kbps of
bandwidth.
CLAN Control LAN, type of Gatekeeper circuit pack.
CNA Converged Network Analyzer, an Avaya product to test and analyze network
performance.
DHCP Dynamic Host Configuration Protocol, an IETF protocol used to automate IP address
allocation and management.
DiffServ Differentiated Services, an IP-based QoS mechanism.
DNS Domain Name System, an IETF standard for ASCII strings to represent IP
addresses.
EAP Extensible Application Protocol.
Gatekeeper H.323 application that performs essential control, administrative, and managerial
functions in the media server. Sometimes called CLAN in Avaya documents.
H.323 A TCP/IP-based protocol for VoIP signaling.
HTTP Hypertext Transfer Protocol, used to request and transmit pages on the World Wide
Web.
HTTPS A secure version of HTTP.
IETF Internet Engineering Task Force, the organization that produces standards for
communications on the internet.
LAN Local Area Network.
LDAP Lightweight Directory Access Protocol, an IETF standard for database organization
and query exchange.
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