What are the differences between video optical transceivers and fiber optic transceivers

Video optical transceivers and optical fiber transceivers are not unfamiliar to many people, but people often confuse the concepts of video optical transceivers and optical fiber transceivers, thinking that they are the same thing. Let's talk about the differences between video optical transceivers and fiber optic transceivers.

ZR Cable Optical Transceiver

1. Optical fiber transceivers are mainly used in the network. One end is connected to the optical fiber, and the other end is connected to the switch, mainly for network signals.

The optical transceiver can transmit video signal, 485 control signal, network signal, alarm signal, audio signal, switch quantity, etc. The optical transceiver on monitoring is generally: one end of the optical transmitter is connected to the camera, the other end is connected to the optical fiber, one end of the optical receiver is connected to the optical fiber, and the other end is connected to the display device.

2. First of all, let's talk about the optical transceiver. There are two kinds of optical transceivers.

a. PDH optical transceivers are used to transmit data signals.

b. The video optical transceiver is used to transmit video monitoring signals. This optical transceiver needs to be divided into (receiver and transmitter) receivers, that is, the main function of the video receiver is to convert optical signals into electrical signals (D/A). The main function of the transmitter, that is, the video transmitter, is to convert electrical signals into optical signals (A/D).

Fiber Transceiver

As mentioned earlier, the optical transceiver is used to transmit video signals. Then the optical fiber transceiver is used to transmit Ethernet signals. Although they are all photoelectric conversions, the protocols and principles of electrical signals are different, and the signals transmitted on the optical path are also different.

3. One end of the optical fiber transceiver is connected to the optical transmission system, and the other end (the user end) is the 10/100M Ethernet interface. Optical fiber transceivers all realize the conversion of photoelectric signals. The main principle of the optical fiber transceiver is that the optical fiber transceiver realized by photoelectric coupling usually has the following basic characteristics.

a. Provide ultra-low latency data transmission.

b. Completely transparent to network protocols.

c. Use special ASIC chips to realize wire-speed data forwarding. Programmable ASIC integrates multiple functions into one chip, and has the advantages of simple design, high reliability, and low power consumption, which can enable the device to obtain higher performance and lower cost.

d. Most of the equipment adopts 1+1 power supply design, supports ultra-wide power supply voltage, and realizes power protection and automatic switching.

e. Support a wide operating temperature range.

f. Support complete transmission distance (0～120km)

Optical transceiver is a device that converts multiple E1 (a data transmission standard for trunk lines, usually at a rate of 2.048Mbps, this standard is used in China and Europe) into optical signals and transmits them. Optical transceivers have different prices according to the number of E1 ports transmitted. Generally, the smallest optical transceiver can transmit 4 E1s, and the current largest optical transceiver can transmit 4032 E1s.

Optical transceivers are divided into 3 categories: PDH, SPDH, SDH.

PDH (Plesiochronous Digital Hierarchy, quasi-synchronous digital series) optical transceiver is a small-capacity optical transceiver, which is generally used in pairs, also called point-to-point applications, and its capacity is generally 4E1, 8E1, and 16E1.

SDH (Synchronous Digital Hierarchy, synchronous digital series) optical transceiver has a large capacity, generally 16E1 to 4032E1.

SPDH (SynchronousPlesiochronousDigitalHierarchy) optical transceiver, between PDH and SDH. SPDH is a PDH transmission system with the characteristics of SDH (Synchronous Digital Series) (based on the principle of code rate adjustment of PDH, and at the same time using part of the networking technology in SDH as much as possible).

The above is the whole content of the difference between the video optical transceiver and the fiber optic transceiver. You must have a comprehensive understanding here, and I hope it will be helpful to everyone.