The role of the light -end machine can also be understood like this. The light -end machine is a device that is used to convert the light signal and the electrical signal. It will not compress the transmitted signals. And the network video server is used to digitize the analog video signal to digitize a digitalization. Specific equipment generally compresses digital signals.

The role of the light -end machine: The transmission equipment in the optical communication system is transformed and the transmission function is performed. It is generally used for telecommunications, power, monitoring, industrial control, video transmission and other functions, which are widely used in various industries. The light -end machine refers to the light -ending machine used to monitor the system used to transmit comprehensive information such as video, data, Ethernet, audio and other comprehensive information. Mainly divide the simulation light -end machine and digital light end machine. Different from the transmission medium is divided into single -mode light -end machines and multi -mode light.

The role of the light -end machine: mainly is to transmit multiple E1 (the data transmission standard of a relay line, usually the rate of 2.048Mbps, this standard is used in China and Europe) to become a light signal and transmitted device (its role is mainly the main function is the main purpose is Implement electric-light and light-electricity conversion). The price is different according to the number of transmission E1 ports. Generally, the smallest light -end machine can transmit 4 E1, and the largest light -ending machine currently can transmit 4032 E1.

Light -end light transmitter and optical receiver, the optical transmitter is a light signal transmitted in the fiber, and the optical receiver is transmitted. The online video server is an audio and video signal that can be accepted. It can be a camera and direct signal. After digital compression encoding, the popular MPEG-4 is a special device for network transmission. The video server generally has the Ethernet RJ-45 interface The fiber FC interface also has an external hard drive of the SCSI interface for front -end storage. He is the most device in the commonly used remote network monitoring system.

The role of a digital light -end machine is to digitize the images, voice and data signals to be transmitted, and then reuse these digital signals to convert the low -speed digital signals into a high -speed signal, and convert this signal to light to light into light. Signal. Restore the light signal into a electrical signal on the receiving end, the restored high -speed signal breaks down the original multi -road and low -speed signals, and finally restores these data signals into images, voice and data signals.

The role of analog -end machine is different from other light -end machines. The analog light -end machine is to modulate the signal to be transmitted and then convert the modulated electrical signal into a light signal. Restore the light signal into a electrical signal on the receiving end, and then demodulate the signal to restore the image, voice or data signal.