Along with the construction of global communications networks, optical fiber is widely used in the creation of local area networks (LANs).
VIACOM OPTIC, a company engaged in automation and electronic technologies, designs and installs local and backbone Ethernet, Fast Ethernet, FDDI, ATM / SDH networks using optical communication lines. VISCOM OPTIC does this for three reasons. Firstly, it is beneficial. When installing extended network segments, repeaters are not required. Secondly, it is reliable. Optical communication lines have a very low noise level, which allows transmitting information with an error coefficient of not more than 10 ** (- 10). Thirdly, it is promising. Fiber-optic communication lines allow you to increase the computing capabilities of the network without replacing cable communications. To do this, you just need to install faster transmitters and receivers. This is important for those users.
A cable for connecting network segments is inexpensive, but laying it can be the largest cost item for installing a network. The work will require not only cable technicians but also a whole team of builders (plasterers, painters, electricians), which will be expensive, given the increasing cost of manual labor. The main LAN topologies are bus, star, ring. At present, optical fiber is difficult to use in the construction of a common bus, but it is convenient to use it for point-to-point communications used in the star and ring topologies.
The FOCL scheme used, in particular, in a LAN, is arranged as follows:
The electrical signal comes from a network controller that is installed in a workstation or server (for example, an Ethernet network controller), then goes to the transceiver's electrical input (for example, an ISOLAN 3Com optical transceiver), which converts the electrical signal into an optical one. An optical cable (for example, OKG-50-2) is connected to the optical connectors of the transceiver using optical connectors (for example, ST).
Comments
Post a Comment