CounterPath X-Lite 4 for Windows User Guide - Manual (Page 62)

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RFC Request for Comment. A document that describes an aspect of an internet technology.
An RFC may be a proposed, draft or full internet standard.
RTP Real-time Transport Protocol. A protocol for delivering the media portion of a data
transmission over an IP network. SRTP is another media protocol.
Signaling In a VoIP phone call, the information in a call that deals with establishing and
controlling the connection, and managing the network. The non-signaling portion of
the call is the Media.
SIMPLE protocol Session Initiation Protocol for Instant Messaging and Presence Leveraging
Extensions. The instant messaging (IM) protocol followed by X-Lite. It encapsulate
the rules for exchanging instant messages.
SIP Session Initiation Protocol. The signaling protocol followed by X-Lite for handling
phone calls.
SIP account An account that provides the user the ability to make VoIP phone calls. The account
encapsulates the rules and functions the user can access.
softphone address The address used to connect to a SIP endpoint. In other words, the “phone number”
used in a VoIP phone call. For example, sip:[email protected].
SRTP Secure Real-time Transport Protocol. A protocol for delivering the media portion of a
data transmission over an IP network. SRTP is a secure protocol, which means that
the media is encrypted. RTP is another media protocol.
TCP Transmission Control Protocol. A transport protocol for delivering data over an IP
network. Other transport protocols are TLS and UDP.
UDP User Datagram Protocol. A transport protocol for delivering data over an IP network.
Another transport protocol is TCP.
URI Uniform Resource Identifier. A name or address that identifies a location on the world
wide web. A softphone address is a type of URI.
URL Uniform Resource Locator. A URI that both identifies a name or address and
indicates how to locate it.
USB device Universal Serial Bus device. A device that follows a specific communications
standard. A headset may be a “USB type” of headset.
VAD Voice Activity Detection. A technology that detects if audio is a human voice or
background noise. X-Lite includes a feature (Preserve bandwidth on the Network
panel of the Preferences window) that controls whether audio is transmitted when
VAD determines that no one is actually speaking.
VoIP Voice over Internet Protocol. A variation of IP used for sending voice data over the
internet, in other words, used for making phone calls over the internet.
WAV Or WAVE. A file format standard for storing audio on PCs.