Table of Contents
Advertisement
Grey Headline (continued)
Glossary
Term
Proxy,
In SIP, 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
Proxy server
role of routing, which means 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.
While a proxy can set up calls between SIP endpoints, it does not participate in the call once it is set up.
RAS
A protocol used between H.323 endpoints and a gatekeeper to register and place calls.
Registration, Admission and Status
Registrar
In SIP, a server that accepts REGISTER requests and places the information it receives in those requests into the location service for the domain it handles. This
information is used to advise other SIP Proxies/Registrars where to send calls for that endpoint.
Regex
A pattern used to match text strings according to a POSIX-defined syntax.
Regular expression
RFC
A process and result used by the IETF for Internet standards.
Request for Comments
RS-232
A commonly used standard for computer serial ports.
RTCP
A control protocol for RTP. Defined by
RTP Control Protocol
RTP
Real time protocol designed for the transmission of voice and video. Defined by
Real-time Transport Protocol
SSH
An encrypted protocol used to provide a secure CLI.
Secure Shell
SIMPLE
An instant messaging and presence protocol based on SIP.
Session Initiation Protocol for Instant
Messaging and Presence Leveraging
Extensions
SIP
IETF protocol for controlling multimedia communication. Defined by
Session Initiation Protocol
SNMP
A protocol used to monitor network devices.
Simple Network Management Protocol
Source alias
The alias present in the "source" field of a message.
SRV record
A type of DNS record. Defined by RFC 2782.
Service record
STUN
Firewall NAT traversal for SIP. Defined by
Simple Traversal of UDP through NATs
Subzone
A segment within a VCS Local Zone.
TCP
A reliable communication protocol defined by
Transmission Control Protocol
Overview and
Introduction
Getting started
status
D14049.05
February 2009
Definition
RFC 3550
RFC 3489
System
VCS
configuration
configuration
[17].
RFC 3550
RFC 3261
[20].
[21].
RFC 791
[18].
Zones and
Call
Bandwidth
neighbors
processing
control
264
TANDBERG
[17].
Firewall
Applications
traversal
VIDEO COMMUNICATIONS SERVER
ADMINISTRATOR GUIDE
Maintenance
Appendices
Advertisement
Table of Contents
