TANDBERG D14049.01 manual Irq, Lan, Lrq, Nat, Ras, Rfc

Glossary

TANDBERG VIDEO COMMUNICATION SERVER ADMINISTRATOR GUIDE

Term

Definition

Interworking

Allowing H.323 systems to connect to SIP systems.

IPv4

Version 4 of the Internet Protocol, defined in RFC 791 [18].

Internet Protocol version 4

IPv6

Version 6 of the Internet Protocol, defined in RFC 2460 [19].

Internet Protocol version 6

IRQ

A request sent to an endpoint requesting information about its status.

Information Request

LAN

A geographically limited computer network, usually with a high bandwidth throughput.

Local Area Network

LDAP

A protocol for accessing on-line directories running over TCP/IP.

Lightweight Directory Access Protocol

Link

In relation to the VCS, a connection between two nodes.

LRQ

A RAS query between gatekeepers to determine the location of an endpoint.

Location Request

NAPTR record

A type of DNS record.

NAT

Also known as IP masquerading. Rewriting source and destination addresses as the IP packet passes through the NAT device.

Network Address Translation

Node

In relation to the VCS, a node is one end of a link. A node can be a local subzone or a zone.

NTP

A protocol used for synchronizing clocks.

Network Time Protocol

Pipe

In relation to the VCS, a means of controlling the bandwidth used on a link.

Proxy, Proxy Server

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

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 RFC 3550 [17].

RTP Control Protocol

RTP

Real time protocol designed for the transmission of voice and video. Defined by RFC 3550 [17].

Real-time Transport Protocol

SSH

An encrypted protocol used to provide a secure CLI.

Secure Shell

Introduction

Getting

System

System

H.323 &

SIP

Registration

Zones and

Call

Firewall

Bandwidth

Maintenance

Appendices

Started

Overview

Configuration

Configuration

Control

Neighbors

Processing

Traversal

Control

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