NetworkExtensionUnit(NXU)-Raytheon.PDFVIP

Application Note: AN-3005_2 Network Extension Unit (NXU) Purpose--Bandwidth Capabilities The purpose of the application note is to provide a description of the NXU bandwidth. The details will cover the following: General description Bandwidth capability General description The NXU is a general-purpose device that interfaces communication equipment by utilizing current network infrastructure. The NXU is considered to be an internet-focused application exploiting VOIP (voice over internet protocol) technology. The advantages to incorporating an NXU into existing communications architecture are: • Enable low cost, extremely flexible radio communication networks • Multiplex voice audio and data over a standard Ethernet network • Eliminate the need for leased lines and microwave sites, to eliminate the requirement for pilot tones and other in band signaling • Facilitate centralized communication from one computer Bandwidth What it Bandwidth? Bandwidth is used to describe the transfer rate of data from one point to the next at any given time. Bandwidth is a key aspect of networking and the Internet business. Bandwidth usage depends upon how equipment, in particular, the NXU, is programmed or configured to function, either, alone or as part of a group. When calculating bandwidth usage of the NXU, the programmer must consider TCP/IP overhead, duplex operations, voice compression settings and data settings. The NXU mainly uses a connectionless-oriented protocol called User Datagram Protocol (UDP) and, when utilizing the RS-232 serial data port, will make use of a connection-oriented protocol called Transmission Control Protocol (TCP). In order to understand how much bandwidth is being utilized by the NXU at any given time, as a consumer, you need to understand each element of the data flow process from end user to end user. What is