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Introduction
Document Organization
1-3
Terms Used in This Guide 1
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, but the content of 802.1p is now incorporated in
802.1D.
ARP Address Resolution Protocol, used 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 TN799 circuit pack.
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.
Gate-
keeper
H.323 application that performs essential control, administrative, and managerial functions
in the call server. Sometimes called CLAN, or TN799 in Avaya documents.
HTTP Hypertext Transfer Protocol, used to request and transmit pages on the World Wide Web.
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.
MAC Media Access Control, ID of an endpoint.
NAPT Network Address Port Translation.
NAT Network Address Translation.
PHP Hypertext Preprocessor, software used to assist in the format and display of web pages.
PSTN Public Switched Telephone Network, the network used for traditional telephony.
QoS Quality of Service, used to refer to a number of mechanisms intended to improve audio
quality over packet-based networks.
RRQ Read Request packet, a message sent from the 4600 Series IP Telephone to the TFTP
server, requesting to download the upgrade script and the application file.
RSVP Resource ReSerVation Protocol, used by hosts to request resource reservations throughout
a network.
RTCP RTP Control Protocol, monitors quality of the RTP services and can provide real-time
information to users of an RTP service.
RTP Real-time Transport Protocol, provides end-to-end services for real-time data (such as voice
over IP).
TCP/IP Transmission Control Protocol/Internet Protocol, a network-layer protocol used on LANs and
internets.
TFTP Trivial File Transfer Protocol, used to provide downloading of upgrade scripts and
application files to the IP Telephones.
UDP
User Datagram Protocol, a connectionless transport-layer protocol.
VLAN
Virtual LAN.
WML
Wireless Markup Language, used by the 4620 web browser to communicate with WML
servers.