TANDBERG D14049.04 manual 273, Term Definition Local VCS

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Glossary

TANDBERG VIDEO COMMUNICATIONS SERVER ADMINISTRATOR GUIDE

Term		Definition
Local VCS		A relative term used to refer to the particular VCS that you are currently administering, as opposed to other VCSs in your network.
Local Zone		A relative term used to refer to the group of endpoints and other systems registered to a particular VCS. If a VCS is part of a cluster, the Local Zone refers to the
		collection of all endpoints and other systems registered to all Peers in that cluster.
LRQ		A RAS query between gatekeepers to determine the location of an endpoint.
Location Request
Microsoft OCS 2007		Microsoft OCS (Office Communications Server) 2007 is an enterprise real-time communications server, providing the infrastructure to allow instant messaging,
		presence, audio-video conferencing and web conferencing functionality.
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
Neighbor		An remote system to which the VCS has a connection via a Neighbor Zone.
Neighbor zone		On the VCS, a zone used to configure a connection to a remote system with which the Local VCS has a non-traversal relationship.
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
Peer		A VCS that has been configured to belong to a Cluster.
PEM		An IETF proposal for securing messages using public key cryptography.
Privacy-Enhanced Electronic Mail:
Pipe		In relation to the VCS, a means of controlling the bandwidth used on a link.
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 RFC 3550 [17].
RTP Control Protocol
Introduction	Getting Started	Overview and	System	VCS	Zones and	Call	Bandwidth	Firewall	Applications	Maintenance	Appendices
		Status	Configuration	Configuration	Neighbors	Processing	Control	Traversal
D14049.04					273
JULY 2008