A cloud 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 covers 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.
Optical transceiver is a short twisted-pair electric signals and optical signals over long distances to swap the Ethernet transmission media conversion unit, in many places also known as the photoelectric Converter or Fiber optic converters (Fiber Converter).
Optical transceiver is generally used in Ethernet cable can't cover, optical fiber must be used to extend the transmission distance of actual network environment, at the same time help the last kilometer in the fiber optic lines connected to the man and the outer also played a big role in the network. With a fiber optic transceiver, it also provides a cheap solution for users who need to upgrade their systems from copper to optical fiber, but short of money, manpower or time. In order to guarantee card with other manufacturers, Repeaters, hubs and switches and other network equipment fully compatible, fiber optic transceivers products must strictly conform to the 10 base-t, 100 base - TX, 100 base - FX, IEEE802.3 u and IEEE802.3 Ethernet standard. In addition, EMC should comply with FCC Part15 in electromagnetic radiation protection. Nowadays due to the major domestic carriers are vigorously construction of community network, campus network and enterprise network, therefore the dosage of the optical transceiver products are also constantly improve, in order to better meet the needs of the access network construction.
Optical transceivers usually have the following basic features:
1. Provides ultra-low latency data transmission.
2. Completely transparent about the network protocol.
3. Use the special ASIC chip to realize the cable speed forward. Programmable ASIC focuses a number of functions on a chip, which has the advantages of simple design, high reliability and low power consumption, which can make the equipment achieve higher performance and lower cost.
4. The rack type equipment can provide hot - plugging function for easy maintenance and uninterrupted upgrade.
5. It can provide the function of network diagnosis, upgrade, status report, abnormal situation report and control, which can provide full operation log and alarm log
6. The device adopts 1 1 power supply design, supports ultra wide power supply voltage, realizes power supply protection and automatic switching.
7. Supports ultra-wide working temperature range.
8. Support complete transmission range (0 ~ 120km)
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.