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Network repeater

The local area network (LAN) is a communications systems that provides a connection among a number of independent computing stations within a small area, such as a single building or group of adjacent buildings. Ethernet is a local-area network (LAN) design which employs carrier sense multiple access with collision detection (CSMA/CD) as an access control method. A repeater transmits information by receiving the information on one cable segment and repeating the received information onto the other cable segment to which it is attached. The repeater may perform a variety of signal processing operations on the received data before it is repeated, such as signal amplification, signal retiming, preamble insertion, etc. Repeaters are widely used in the transmission of information throughout a system, and are particularly useful in the transmission of information throughout a local area network (LAN). Repeaters in LANs are simple devices for broadcasting data packets originating at one port of the repeater to all other ports. Multiple end stations, i.e., data terminal equipment (DTEs), connect to repeaters via coaxial cables, or twisted-pair wiring, or optical fiber in the LAN. Repeaters are commonly used to increase the number of ports on a LAN. A typical repeater comprises a single integrated circuit chip. Because an IC chip has limited drive current, each chip has a limited number of ports. A network repeater typically has four, eight, or sixteen ports. Any transmission to any of the ports is repeated to all the other ports on the repeater. Thus all the ports see transmissions from any of the repeater ports. In an Ethernet network, a typical Ethernet frame or packet includes a preamble, a header, data, and trailer components or sequences. When an Ethernet communication hub, such as an Ethernet repeater, receives a packet of data, a portion, if not the entire preamble sequence may be truncated. An Ethernet network repeater typically includes multiple transceivers for interfacing with other communication nodes through a transmission medium. The transceivers usually include circuitry for both the transmission and the reception of data packets. An Ethernet repeater typically includes core logic for coordinating the data traffic for the transceivers. The repeater performs signal amplitude and timing restoration on an incoming bitstream and repeats the bitstream to all of the ports connected to the repeater. By repeating data to all ports, the repeater acts as a logical coaxial cable so that any node connected to the network will see another node's transmission. A multiport repeater is a device which performs signal conditioning on a received signal, wherein, the signal is amplified and timing margins are restored. Multiport repeaters, also referred to as hubs or wiring concentrators, allow interconnection of a number of network segments at the physical layer of the network protocol.

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Network repeater product listings

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