WLAN, LAN

PoE (Power over Ethernet) is the name of a number of methods that allow for powering network devices through UTP/FTP cables. This way it is possible to power devices such as cameras, phones, switches, access points, etc.

Omada SDN platform for network infrastructure management integrates such network devices as: access points, switches and network gateways.

Exchanging data between at least two computers requires a dedicated computer network has to be created. In such a network, the devices communicate using transmission media via appropriate communication protocols. Not only computers and servers can be connected to a computer network these days, but also CCTV equipment, alarms, smart home components or household appliances.

Signal HD converters of HDMI (or VGA) to IP interface allow users to transmit and distribute high-resolution (HD) signals via computer IP networks to HD-enabled televisions/monitors (with HDMI or VGA inputs). They also enable users to control the source devices from the remote locations of the televisions/monitors through the original remote controls or, where applicable, through USB devices (mouse and/or keyboard – e.g. in the case of STBs and NVRs).

Twisted-pair cables are used to transmit signals in telecommunication systems and computer networks. The most popular twisted-pair cables are composed of four pairs of twisted insulated copper wires. The twisting strongly reduces the influence of external electromagnetic interference and mutual interference between the pairs, called crosstalk. Currently, the cables are mainly used in telephony and Ethernet networks.

Wireless network in a school should provide access to the Internet throughout the school building and offer bandwidth sufficient for comfortable use of network services by students, teachers and administrative staff. The key factors in choosing the devices is their bandwidth and the maximum number of supported users.

The Yagi-Uda or Yagi antenna is one of the most popular antenna designs. Despite a comparatively simple construction, it has a high gain, typically greater than 10 dBi. Yagi-Uda antennas can operate in the HF to UHF bands (3 MHz to 3 GHz), but often within a limited bandwidth around the center frequency.

ULTIPOWER Ethernet industrial switches enable data transmission at rates of 10/100 Mbps or 1000 Mbps. Their RJ45 ports support auto-negotiation and Power over Ethernet (PoE) functions. The devices automatically discover PD devices (///Power Device///) compliant with IEEE 802.3af standard and supply power to them. This way, it is easy to power network devices located in places without access to AC lines, such as access points, IP cameras, IP phones etc. The switches have been equipped with optical converters or SFP slots for installing modules changing the transmission medium to fiber.

Twisted-pair cables are used to transmit signals in telecommunication systems and computer networks. Currently they are mainly used in analog telephony and Ethernet networks. Twisted-pair cables may consist of one or more pairs. The twisting strongly reduces the influence of external electromagnetic interference and mutual interference between the pairs, called crosstalk.

The user of a wireless network device such as access point, wireless adapter, modem etc. who wants to buy an external antenna should know the type of the antenna connector used in the device. A multitude of solutions and slight differences in appearance mean that less experienced users can have great difficulty in choosing the antenna with a matching connector.