The main purpose of module SFP – conversion from electrical signal to optical on and back to fiber optic transmission. For her role – this is the same media converter, only much more compact and requires no additional power supply.
Unlike medical, optical transceivers are technically more advanced devices. They are produced under a wider range of optical lines in length, and parameters of fiber used. Also, many specialty modules (Cisco, for example, or Juniper) display enable signal parameters and to monitor the optical fiber line. And here at cheaper copies of type Opticin, Giganet, Newnets or inexpensive unnamed Chinese artefacts, this is not possible.
The number of fibers used distinguish monofilament using for reception (Tx) and transmit (Rx) single fiber, and two-fiber where reception goes on one fiber, and the transmission – in another. Single-fiber unit to work uses WDM technology WDM channels, which has an integrated multiplexer. On the product label as flagged.
– the type of fibers used on the date for the transmission of signals used two types – single-mode SM and multimode the MM . SFP module can only work with one of them. No universal devices. – at the central wavelength of light According to the central wavelength of maximum transmitted signal strength. The wavelength measured in nanometers – nm. The most common values for singlemode TFP modules – 1310 nm and 1550 nm and the multimode – 850 nm and 1310 nm. This option is also indicated on the product label.
On optical budget (distance signal transmission), SFP module is both a receiver and a transmitter. On the one hand, it produces a laser light signal specific power that is lost as it passes the distance along the fiber until finally damped. On the other hand, the receiver of the transceiver can accept a certain light output power. If it is strongly damped, the signal is lost. So optical budget – is the difference between the maximum and the minimum transmitter power receiver. The larger the budget, the greater the range.
SFP transceivers to multimode fiber-optic data transmission
When calculating the amount of FOCL construction accounted for meter involved a fiber optic cable, the cost of transmitting and receiving equipment. Among the switching equipment of great importance is attached to a fiber optic transceiver.
SFP transceivers are used to connect network adapter’s active equipment, locks and other devices connected to optical networks. Connection is performed by switching through optical connectors ST type or MTRJ. This type of switch enables benefits such as sending data over long distances, and also allows to carry out two-way data transfer and establish a data transmission path at rates up to 4 Gbit/sec. Significantly, wherein the optical modules such as, Cozlink glc sx mmd, is much smaller than for example, optical transceivers gbic. This compactness of the equipment allows you to connect at the same time a huge number of ports, their number reaches 256.
Optical switches are of several types, this is because there are many varieties of Fiber Optical Transceiver code which are different from each other, or function are essential properties. This feature sfp-defined modules that transceivers do not use external power sources, using a slot router. And thanks to the possibility of multimode cables combine different kinds of optical modules in the switch there is a chance to combine several optical modules with different transmission speeds.