Key Terms 8 Flashcards
The structured transmission of data between organizations. It is considered to describe the rigorously standardized format of electronic documents and commonly used in supply chains between customers, vendors, and suppliers.
Electronic data interchange (EDI)
A hosted EDI service offering that acts as an intermediary between business partners sharing standards-based or proprietary data via shared business processes.
Value-added network (VAN)
A network that usually spans a city or a large campus, interconnects a number of LANs using a highcapacity backbone technology, and provides up-link services to WANs or the Internet.
Metropolitan area network (MAN)
Standardized multiplexing protocols that transfer multiple digital bit streams over optical fiber and allow for simultaneous transportation of many different circuits of differing origin within a single framing protocol.
Synchronous Optical Networking (SONET) and Synchronous Digital Hierarchy (SDH)
A data link technology that is used as a metropolitan area network to connect customer networks to larger service networks or the Internet. Businesses can also use BLANK to connect distributed locations to their intranet.
Metro Ethernet
A telecommunication network that covers a broad area and allows a business to effectively carry out its daily function, regardless of location.
Wide area network (WAN)
A method of combining multiple channels of data over a single transmission line.
Multiplexing
Dedicated lines that can carry voice and data information over trunk lines. It is a general term for any of several digitally multiplexed telecommunications carrier systems.
T-carriers
A type of multiplexing in which two or more bit streams or signals are transferred apparently simultaneously as subchannels in one communication channel, but are physically taking turns on the single channel.
Time-division multiplexing (TDM)
Multiplying the available capacity of optical fibers through use of parallel channels, with each channel on a dedicated wavelength of light. The bandwidth of an optical fiber can be divided into as many as 160 channels.
Wave-division multiplexing (WDM)
Dividing available bandwidth into a series of nonoverlapping frequency sub-bands that are then assigned to each communicating source and user pair. BLANK is inherently an analog technology.
Frequency-division multiplexing (FDM)
Transmitting several types of data simultaneously across a single transmission line. BLANK technologies analyze statistics related to the typical workload of each input device and make real-time decisions on how much time each device should be allocated for data transmission.
Statistical time-division multiplexing (STDM)
A line bridging device for use with T-carriers, and that is required by PSTN providers at digital interfaces that terminate in a Data Service Unit (DSU) on the customer side. The DSU is a piece of telecommunications circuit terminating equipment that transforms digital data between telephone company lines and local equipment.
Channel Service Unit (CSU)
