| 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. |
| LLDP |
Link Layer Discovery Protocol. All IP telephones with an Ethernet interface support the transmission and reception of LLDP frames on the Ethernet line interface in accordance with IEEE standard 802.1AB. |
| 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. |
| NAT |
Network Address Translation. |
| OPS |
Off-PBX Station. |
| PAE |
Port Access Entity. The protocol entity associated with a port. The PAE supports the protocol functionality associated with the authenticator, supplicant, or both. |
| PHP |
Hypertext Preprocessor, software used to assist in the format and display of Web pages. |
| PoE |
Power over Ethernet. |
| PSTN |
Public Switched Telephone Network, the network used for traditional telephony. |
| QoS |
Quality of Service, used to refer to several mechanisms intended to improve audio quality over packet-based networks. |
| Registration Server |
A SIP server that accepts REGISTER requests. The Registration Server places the information received in the requests into the location service for the domain the server handles. |
| 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. |
| SDP |
Session Description Protocol. A well-defined format for conveying sufficient information to discover and participate in a multimedia session. |
| Signaling Channel Encryption |
Encryption of the signaling protocol exchanged between the IP telephone and the call server. Signaling channel encryption provides additional security to the security provided by media channel encryption. |
| SIP |
Session Initiation Protocol. An IETF standard protocol for IP communication. SIP enables IP telephony gateways, client endpoints, PBXs, and other communication systems or devices to communicate with each other. SIP mainly addresses the call setup and tear down mechanisms of sessions and is independent of the transmission of media streams between the caller and the party called. SIP is an alternative to H.323 for VoIP signaling. |
| SNMP |
Simple Network Management Protocol. The Internet standard protocol, defined in STD 15, RFC 1157, developed to manage nodes on an IP network. |
| SNTP |
Simple Network Time Protocol. An adaptation of the Network Time Protocol used to synchronize computer clocks in the internet. |
| Supplicant |
An entity at one end of a point-to-point LAN segment that is being authenticated by an authenticator at the other end. |
| 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. |
| TLS |
Transport Layer Security, an enhancement of Secure Sockets Layer (SSL). TLS is compatible with SSL 3.0 and allows for privacy and data integrity between two communicating applications. |
| TLV |
Type-Length-Value elements transmitted and received as part of Link Layer Discovery Protocol (LLDP). |
| UDP |
User Datagram Protocol, a connectionless transport-layer protocol. |
| Unnamed Registration |
Registration with Avaya Communication Manager by an IP telephone with no extension. Unnamed registration is typically used to limit outgoing calling. |
| VLAN |
Virtual LAN. |
| VoIP |
Voice over IP, a class of technology for sending audio data and signaling over LANs. |
| WML |
Wireless Markup Language, used by the 4620 Web Browser to communicate with WML servers. |
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