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Glossary of Terms
116 9600 Series SIP IP Telephones Administrator Guide SIP Release 2.0
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.
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. SIP Software Release 2.0 and up supports
LLDP.
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.
PPM Personal Profile Manager, part of the SIP Enablement Services (SES) platform. PPM
is responsible for maintaining and managing end users’ personal information in the
system.
Proxy
Server
An intermediary entity that acts as both a server and a client for the purpose of making
requests on behalf of other clients. A proxy server primarily plays the role of routing,
meaning its job is to ensure that a request is sent to another entity "closer" to the
targeted user. Proxies are also useful for enforcing policy, for example, making sure a
user is allowed to make a call. A proxy interprets, and if necessary, rewrites specific
parts of a request message before forwarding it.
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.
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.
SCEP Simple Certificate Enrollment Protocol, used to obtain a digital certificate.
SDP Session Description Protocol. A well-defined format for conveying sufficient
information to discover and participate in a multi session.
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