Grey Headline (continued)
Glossary
TANDBERG VIDEO COMMUNICATIONS SERVER ADMINISTRATOR GUIDE
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NTP |
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| A protocol used for synchronizing clocks. |
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Network Time Protocol |
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PEM |
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| An IETF proposal for securing messages using public key cryptography. |
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Pipe |
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| In relation to the VCS, a means of controlling the bandwidth used on a link. |
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Proxy, |
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| 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 |
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| 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 | |||||||||||||||
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| (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. | |||||||||||||||
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| While a proxy can set up calls between SIP endpoints, it does not participate in the call once it is set up. |
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RAS |
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| A protocol used between H.323 endpoints and a gatekeeper to register and place calls. |
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Registration, Admission and Status |
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Registrar |
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| 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 | |||||||||||||||
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| information is used to advise other SIP Proxies/Registrars where to send calls for that endpoint. |
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Regex |
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| A pattern used to match text strings according to a |
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Regular Expression |
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RFC |
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| A process and result used by the IETF for Internet standards. |
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Request for Comments |
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| A commonly used standard for computer serial ports. |
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RTCP |
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| A control protocol for RTP. Defined by RFC 3550 [17]. |
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RTP Control Protocol |
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RTP |
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| Real time protocol designed for the transmission of voice and video. Defined by RFC 3550 [17]. |
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SSH |
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| An encrypted protocol used to provide a secure CLI. |
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Secure Shell |
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SIP |
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| IETF protocol for controlling multimedia communication. Defined by RFC 3261 [20]. |
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Session Initiation Protocol |
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SNMP |
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| A protocol used to monitor network devices. |
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Simple Network Management Protocol |
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Source Alias |
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| The alias present in the “source” field of a message. |
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SRV record |
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| A type of DNS record. |
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Service record |
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STUN |
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| Firewall NAT traversal for SIP. Defined by RFC 3489 [21]. |
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Simple Traversal of UDP through NATs |
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Subzone |
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| A segment of a VCS zone. |
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Introduction | Getting Started |
| Overview and |
| System |
| VCS |
| Zones and |
| Call |
| Bandwidth |
| Firewall |
| Maintenance | Appendices | |
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| Status |
| Configuration |
| Configuration |
| Neighbors |
| Processing |
| Control |
| Traversal |
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D14049.03 |
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MAY 2008 |
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