Issue 1 June 2007
101
Appendix A: Glossary of Terms
802.1P
802.1Q
802.1Q defines a layer 2 frame structure that supports VLAN identification and a QoS
mechanism usually referred to as 802.1P.
802.1X
Authentication method for a protocol requiring a network device to authenticate with a
back-end Authentication Server before gaining network access. Applicable 1600
Series IP telephones support IEEE 802.1X for pass-through and for Supplicant
operation 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. The Domain Name System (DNS) is a distributed Internet directory
service. DNS is used mostly to translate between domain names and IP addresses.
Avaya 1600 Series IP Telephones can use DNS to resolve names into IP addresses.
In DHCP, TFTP, and HTTP files, DNS names can be used wherever IP addresses
were available as long as a valid DNS server is identified first.
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.
MAC
Media Access Control, ID of an endpoint.
Media
Channel
Encryption
Encryption of the audio information exchanged between the IP telephone and the call
server or far end telephone.
NAPT
Network Address Port Translation.
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