A router is a device that forwards data packets between computer networks, creating an overlay internetwork. A router is connected to two or more data lines from different networks. When a data packet comes in on one of the lines, the router reads the address information in the packet to determine its ultimate destination. Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey. Routers perform the "traffic directing" functions on the Internet. A data packet is typically forwarded from one router to another through the networks that constitute the internetwork until it gets to its destination node
A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from light emitting diodes to radio. The most familiar example is a voice band modem that turns the digital data of a personal computer into modulated electrical signals in the voice frequency range of a telephone channel. These signals can be transmitted over telephone lines and demodulated by another modem at the receiver side to recover the digital data. .
In ISDN terminology, a terminal adapter or TA is a device that connects a terminal (computer) to the ISDN network.
TA is an ISDN terminal adaptor connecting a existing PC (or other device with. Serial port) to the ISDN. It gives access to on-line services as the Internet, CompuServe and T-Online and is also suitable for a remote LAN access. You can see it as a digital replacement for an analog modem..
A network switch or switching hub is a computer networking device that connects network segments or network devices. The term commonly refers to a multi-port network bridge that processes and routes data at the data link layer(layer 2) of the OSI model. Switches that additionally process data at the network layer(layer 3) and above are often referred to as layer-3 switches or multilayer switches.
An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries or a flywheel. The on-battery runtime of most uninterruptible power sources is relatively short (only a few minutes) but sufficient to start a standby power source or properly shut down the protected equipment.
A burglar alarm is a system designed to detect intrusion -- unauthorized entry -- into a building or area. They are also called security alarms, security systems, intrusion detection systems, perimeter detection systems, and similar terms.
An optical fiber cable is a cable containing one or more optical fibers. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable will be deployed..
1. Saves unnecceray walking every time towards the gate.
2. Protects from burglary and other Harassments.
3. You can open the door lock by pressing switch from the phone.
4. Saves the cost of Watchman.
5. You can see the stranger even in complete darkness.
6. Save scosting of Extra CCTV Systems an Switcher.
Network bridging describes the action taken by network equipment to allow two or more communication networks, or two or more network segments connecting the networks to create an amalgamated network, distinct from a router which would allow the networks to communicate independently as separate networks
A fiber media converter is a simple networking device that make it possible to connect two dissimilar media types such as twisted pair with fiber optic cabling. They were introduced to the industry nearly two decades ago, and are important in interconnecting fiber optic cabling-based systems with existing copper-based, structured cabling systems. They are also used in MAN access and data transport services to enterprise customers..
Fiber patch cords are used for linking the equipment and components ,we have fiber patch cable with different fiber connector types,our low insertion loss and low back reflection .patch cord is widely applied in Telecommunication Networks ,Gigabit Ethernet and Premise Installations.
Telecommunication cables are a type of guided transmission mediums. Cables are usually known to transmit electric energy (AC/DC) but in telecommunications fields, cables are used to transmit electromagnetic waves, they are called electromagnetic wave guides. Telecommunications are based on transmitting modulated waves/signals through a medium and receiving them. When the distance between the transmitter and receiver is far, or we are using unguided medium transmission, the antennas are used, otherwise in guided medium transmission, the telecommunication cables are used. Telecommunication cables are divided into several types.
Twisted pair cabling is a type of wiring in which two conductors of a single circuit are twisted together for the purposes of canceling out electromagnetic interference (EMI) from external sources; for instance, electromagnetic radiation from unshielded twisted pair (UTP) cables, and crosstalk between neighboring pairs.