Q:What is the role of optical repeaters in fiber communications?

Optical signal transmission in optical fiber will have loss and dispersion, and non line letter effect will affect the transmission distance and capacity. The loss will affect the signal amplitude, and the dispersion will lead to fiber bandwidth broadening and error codeIn order to long-distance transmission must join the optical relay system in optical fiber transmission line, transmission loss and dispersion is used to compensate the signal. If not, the signal in long-distance transmission is too small and the occurrence of serious error, the receiver can not successfully received.The high cost of optical relay, optical amplifier after the optical amplifier is generally used instead of optical relay, commonly used Amplifier EDFA and Raman amplifier (EDFA), also have the dispersion compensation of dispersion compensation amplifier new.

Q:Wireless repeaters are restored to initial strength regardless of how weak the signal is What is the principle of a wireless repeater?

Radio is a radio signal repeater radio relay station! It is a middle long distance transmission amplification transmission equipment VHF radio! If we use mobile phone! It is visible from the spread of the linear wave! For transmitting antenna height and the ground surface is curved finite limit! It only in a few kilometers is transmitted within the relay! You need to set the interval of this relay station can realize remote transmission!

Q:What's the function of repeaters in fire fighting engineering?

When the bus isolator is at fault, isolated bus part and the whole system will fail, to ensure that the rest of the system can work normally, and to determine the fault location of bus.

Q:What are the layers of routers, switches, repeaters, gateways, bridges and so on?

Data link layer - MAC and LLC, data frame, switching (two layer switch: exclusive bandwidth, split collision domain, no broadcast domain)

Q:How to set up slow relay network?

Method 1: connect the repeater to your computer with a network cable, not WIFI. (this method is the simplest, but it's very messy and many computers are sharing more chaos)Method two: buy a wireless router, wireless router and repeater cable connections, and then the signal WIFI through the sharing of the wireless router, the reason is very simple, only the wireless repeater, without wireless forwarding, so the bandwidth of all for receiving and forwarding by cable to the router to complete. (this method is practical and suitable for wireless sharing, but the device cost is high)

Q:Millet router Mini how to enter after changing relay

Before you start the upgrade, enter the router, manage the password, and then go to the home page.Go to the home page, click the router settings, select the Internet settings, select the work mode below, and start setting up:Millet router Mini mode switching

Q:Routers, repeaters, two computers are connected, and how to form a LAN

Routers do not have special settings (but to open the DHCP service), and the repeater uses the AP mode (to turn off the DHCP service and modify the repeater LAN address with the same network segment of the router, but not IP).If wireless, it's simplerRouters do not have special settings (but to open the DHCP service), and the repeater relays the signal to the main router via the wireless signal in the relay mode, and forwards the signal.

Q:The role of field bus PROFIBUS DP/FMS isolation repeater is also discussed

As far as DP is concerned, a repeater must be added every 32 DP devices according to specifications. The relay acts as follows1, photoelectric isolation signal, 2, can change the topology (if necessary, can produce a tree branch) 3, cut and cut terminal resistance4, to enhance the signal, optimize the waveform and extend the communication distance

Q:What is SIEMENS's bus repeater?

The 485 repeater is an optical isolated RS-485/422 data relay communication product, which can relay to extend the communication distance of the RS-485/422 bus network and enhance the RS-485/422 bus networkNumber of equipment.

Q:M wireless routing repeater USD hole how to adjust the transmit signal

The input router management IP, log into the background into the wireless settings, all the settings must be guaranteed and the same set of relay routers; check the "open WDS", SSID and BSSID wireless router to input bridging (MAC address);