Troubleshooting in Wi-Fi networks Troubleshooting wireless networks is a task quite different from that in traditional wired networks.
ARMY 2018: not for army alone The international military technical forum ARMY-2018 and the National Security Week were held from 21 to 26 August 2018 in accordance with the order of the Government of the Russian Federation. In the Patriot Congress and Exhibition Centre in Moscow region, where both large-scale events took place, the equipment and solutions for information and telecommunication technologies were widely represented.
Solutions to problems of additional professional education in telecommunications Based on the current professional standards, it is necessary to develop educational standards and training programs for professional retraining and advanced training for different categories of specialists in telecommunications.
Dependence of the bandwidth of DWDM lines with coherent 100g DP-QPSK channels on bandwidth and transmission range A phenomenological model of the DWDM line with coherent 100G DP-QPSK channels based on experimental data and numerical modeling is proposed. In addition to the noise of amplified spontaneous emission, the model takes into account linear cross-channel interference from adjacent channels, as well as nonlinear self-interaction and cross-coupling ofDWDM channels. It is shown that in the linear mode, characteristic for communication lines with a moderate range (up to 2000 km), the throughput is directly proportional to the width and depends little on the range. When using amplifiers with a bandwidth of 200 nm, the line capacity can exceed 75 Tbps. In the nonlinear mode (at a range of more than 2000 km), the throughput rapidly decreases with increasing range. Nevertheless, at a range of up to 4500 km, the capacity of communication links with the 200 nm band is 35 Tbps.
Fiber assemblies for trunk cables of parallel transmission systems The alignment of the lengths of the individual optical fibers of the trunk cables, which is necessary to ensure the achievement of the target value of the optical skew, can be performed in various ways.
Target attacks on IoT and network security vulnerabilities increase The development of IoT is not without risks. Devices and applications that use digital data are completely dependent on the level of security and safety of this data. Cybercriminals are aware of vulnerabilities and use all loopholes to infect the network with malware and to gain control over the user’s devices.
Video Surveillance in the hotel: expert opinion Providing security with the use of video surveillance systems in the hotel business has long passed from the level of recommendations to the mandatory requirements of legislation. In the article typical requirements for hotel complexes of various levels with an emphasis on some necessary elements are considered.