 instructions and diagrams sent from computers to the glasses with directions for the next steps in processes. In this way, workers don't have to interrupt their work to read instructions. INCREASING NETWORK CAPACITY VIA MULTIPLEXING Multiplexing combines traffic from multiple devices or sources into one stream SO that they can share a circuit www.TechnicalPDF.com or path through a network. Each source does not require a separate, dedicated link. Like compression, companies and carriers use multiplexing to send more information on wireless airwaves, fiber networks, and internal Local Area Networks (LANs). However, unlike compression, multiplexing does not alter the actual data sent. Rather, the multiplexer at the transmitting end combines messages from multiple devices and sends them on the same wire, wireless, or fiber medium to their destination, whereupon a matching device distributes them locally. One important goal is to make more efficient use of the most expensive portion of a carrier's network SO that the carrier can handle the vast amounts of traffic generated by devices such as smartphones and computers. Multiplexing is also used by enterprises that link offices together or access the Internet by using only one circuit (a path between sites) rather than paying to lease multiple circuits from their provider. The two most commonly used types of multiplexing are time division and statistical. Time-Division Multiplexing Time-Division Multiplexing (TDM) is a digital multiplexing scheme that saves capacity for each device or voice conversation. Once a connection is established, capacity is saved even when the device is idle. For example, if a call is put on hold, no other device can use this spare capacity. Small slices of silence in thousands of calls in progress result in high amounts of unused network capacity. This is the reason TDM is being replaced in high-traffic portions of networks by VoIP technologies, in which voice packets are interspersed with data and video traffic more efficiently, without wast