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Cloud Tranceiver Transmission Distance

Transceiver is a device for signal conversion, usually a fiber optic transceiver.Optical transceiver, transform twisted-pair electric signals and optical signals to each other, to ensure the smooth transport packets between two networks, at the same time, it will network transmission distance limit 100 metres from the copper wire is expanded to 100 kilometers (single-mode fiber)."

Maximum transmission distance, due to the use of different media, transceiver can transmission distance is different also, multi-mode transceiver general transmission distance between the 2 km to 5 km, and single-mode transceiver override can range from 20 km to 120 km.It is important to note that the transmitting power, reception sensitivity and wavelength of the optical transceiver itself are not the same as the transmission distance.The receiving sensitivity of the 5-kilometer optical fiber transceiver is -30db, using the wavelength of 1310nm;The receiving sensitivity of the 120km fiber transceiver is -38db, using 1550nm wavelength.

According to the rate, the optical transceiver can be divided into 10M, 100M optical transceiver, 10/100m self-adaptive optical transceiver and 1000M optical transceiver.

10M and 100M of transceiver products work in the physical layer, and the transceiver products at this level of work are bitwise to forward data.The forwarding method has advantages of fast forwarding speed, high permeability and low delay, which is better in compatibility and stability, and is suitable for the link of speed fixation.And 10/100 m optical transceiver is working in the data link layer, in this layer optical transceiver using store-and-forward mechanism, such forwarding mechanism received each packet to read the source MAC address, the destination MAC address, and at the completion of the CRC cyclic redundancy check after the packet forwarding.The advantage of store-forwarding is that it prevents some of the wrong frames from spreading in the network, takes up valuable network resources, and can also prevent the loss of packets caused by network congestion.When the data link is saturated, the forward can store the unforwarded data first in the buffer of the transceiver, and then forward when the network is idle.This reduces the likelihood of data collisions and ensures the reliability of data transmission, so that 10/100m of optical transceivers are suitable for work on the unfixed link.

According to the structure, can be divided into the desktop (independent) optical transceiver and the rack type optical transceiver.

The desktop optical transceiver is suitable for single user, such as the connection of single switch in the floor.Frame type optical transceiver is suitable for multi-user together, such as the center of the room must meet the part of all the switches inside the village, using frame type is advantageous for the realization of all modules optical transceiver of unified management and unified power supply.

According to the fiber, can be divided into multi-mode fiber transceiver and single mode fiber transceiver.

Due to the use of optical fiber is different, transceiver can transmission distance is different also, multi-mode transceiver general transmission distance between the 2 km to 5 km, and single-mode transceiver override can range from 20 km to 120 km.It is important to note that the transmitting power, reception sensitivity and wavelength of the optical transceiver itself are not the same as the transmission distance.The transmitting power of the 5-kilometer fiber transceiver is generally between -20 ~ -14db, and the receiving sensitivity is -30db, with the wavelength of 1310nm;The transmitting power of the 120km fiber transceiver is between -5 ~ 0dB, and the receiving sensitivity is -38db, with the wavelength of 1550nm.

According to the number of fibers, can be divided into single fiber optic transceiver and bifiber optic transceiver.

As the name suggests, single-fiber equipment can save half of the fiber, that is, to receive and send data on a single fiber, which is very applicable in areas where the fiber resources are stressed.These products use the technology of wavelength division multiplexing, with the wavelength of more than 1310nm and 1550nm.But since there is no uniform international standard for single-fiber transceiver products, there may be incompatibilities between different manufacturers' products in interconnection.In addition, with the use of wavelength division multiplexing, the product of single fiber transceiver has the characteristics of signal failure.Currently, the fiber transceiver in the market is double fiber products, such products are mature and stable.


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