Appendix D - Glossary
International Telecommunication Union (ITU)
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Mediatrix 4400 – Digital Gateway
International Telecommunication Union (ITU)
Organization based in Geneva, Switzerland, that is the most important telecom standards-setting body in the
world.
Internet Protocol (IP)
A standard describing software that keeps track of the Internet’s addresses for different nodes, routes outgoing
messages, and recognizes incoming messages.
Light Emitting Diode (LED)
A semiconductor diode that emits light when a current is passed through it.
Local Area Network (LAN)
Data-only communications network confined to a limited geographic area, with moderate to high data rates.
See also WAN.
Media Access Control (MAC) Address
A layer 2 address, 6 bytes long, associated with a particular network device; used to identify devices in a
network; also called hardware or physical address.
Network
A group of computers, terminals, and other devices and the hardware and software that enable them to
exchange data and share resources over short or long distances. A network can consist of any combination
of local area networks (LAN) or wide area networks (WAN).
Private Branch Exchange (PBX)
A small to medium sized telephone system and switch that provides communications between onsite
telephones and exterior communications networks.
Protocol
A formal set of rules developed by international standards bodies, LAN equipment vendors, or groups
governing the format, control, and timing of network communications. A set of conventions dealing with
transmissions between two systems. Typically defines how to implement a group of services in one or two
layers of the OSI reference model. Protocols can describe low-level details of machine-to-machine interfaces
or high-level exchanges between allocation programs.
Public Switched Telephone Network (PSTN)
The local telephone company network that carries voice data over analog telephone lines.
Router
A specialized switching device which allows customers to link different geographically dispersed local area
networks and computer systems. This is achieved even though it encompasses different types of traffic under
different protocols, creating a single, more efficient, enterprise-wide network.
Switched Circuit Network (SCN)
A communication network, such as the public switched telephone network (PSTN), in which any user may be
connected to any other user through the use of message, circuit, or packet switching and control devices.
Server
A computer or device on a network that works in conjunction with a client to perform some operation.
Session Initiation Protocol (SIP)
A protocol for transporting call setup, routing, authentication, and other feature messages to endpoints within
the IP domain, whether those messages originate from outside the IP cloud over SCN resources or within the
cloud.
Summary of Contents for Mediatrix 4401
Page 6: ...Contents vi Mediatrix 4400 Digital Gateway ...
Page 22: ...Chapter 2 Installation Hardware Installation 12 Mediatrix 4400 Digital Gateway ...
Page 40: ...Appendix B Cabling Considerations RJ 45 Cable 30 Mediatrix 4400 Digital Gateway ...
Page 46: ...Appendix C Standard Hardware Information Warranty 36 Mediatrix 4400 Digital Gateway ...
Page 50: ...Appendix D Glossary Wide Area Network WAN 40 Mediatrix 4400 Digital Gateway ...
Page 52: ...Appendix E List of Acronyms 42 Mediatrix 4400 Digital Gateway ...
