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  • PON: Understand OLT, ONU, ONT and ODN

    In recent years, fiber to the home (FTTH) has begun to be valued by telecommunication companies around the world, and enabling technologies are developing rapidly. There are two important system types for FTTH broadband connections. These are Active Optical Network (AON) and Passive Optical Netwo...
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  • How are switch VLANs divided?

    1. Divide VLAN according to port: Many network vendors use switch ports to divide VLAN members. As the name suggests, to divide VLAN based on ports is to define certain ports of the switch as a VLAN. The first-generation VLAN technology only supports the division of VLANs on multiple ports of the...
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  • Is the optical modem connected to the switch or the router first

    Connect the router first.   The optical modem is connected to the router first and then to the switch, because the router needs to allocate ip, and the switch cannot, so it must be placed behind the router. If password authentication is required, of course, first connect to the WAN port of the ro...
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  • Overview and functions of optical switches

    Overview of  Optical Switch: fiber optic switch is a high-speed network transmission relay device. Compared with ordinary switches, it uses fiber optic cables as the transmission medium. The advantages of optical fiber transmission are fast speed and strong anti-interference ability. Fibre Channe...
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  • Six common faults of fiber optic transceivers

    Fiber optic transceiver is an Ethernet transmission media conversion unit that exchanges short-distance twisted-pair electrical signals and long-distance optical signals. It is also called a photoelectric converter (Fiber Converter) in many places.   1. The Link light does not light up (1) C...
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  • The difference between a switch and a router

    (1) From the appearance, we distinguish between the two Switches usually have more ports and look cumbersome. The router’s ports are much smaller and the volume is much smaller. In fact, the picture on the right is not a real router but integrates the function of the router. In addition to the fu...
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  • Which ONU equipment is better for the monitoring system?

    Nowadays, in social cities, surveillance cameras are basically installed in every corner. We will see various surveillance cameras in many residential buildings, office buildings, shopping malls, hotels and other places to prevent the occurrence of illegal activities. With the steady development ...
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  • What is an ONU device?

    ONU (Optical Network Unit) optical network unit, ONU is divided into active optical network unit and passive optical network unit. Generally, devices equipped with network monitoring including optical receivers, upstream optical transmitters, and multiple bridge amplifiers are called optical node...
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  • OTN in the era of all-optical network 2.0

    The way of using light to transmit information can be said to have a long history. The modern “Beacon Tower” has allowed people to experience the convenience of transmitting information through light. However, this primitive optical communication method is relatively backward, limited...
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  • How to quickly distinguish between switches and routers

    What is a router? Routers are mainly used in local area networks and wide area networks. It can connect multiple networks or network segments to “translate” data information between different networks or network segments, so that they can “read” each other’s data to ...
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  • What are the main types of ONU equipment used by fiber-optic broadband clients?

    1. The ONU equipment used by the client is mainly as follows: 1) In terms of the number of LAN ports, there are single-port, 4-port, 8-port and multi-port ONU devices. Each LAN port can provide bridging mode and routing mode respectively. 2) According to whether it has WIFI function or not, it ca...
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  • What is the difference between an ordinary ONU and an ONU that supports POE?

    Security people who have worked in PON networks basically know ONU, which is an access terminal device used in PON network, which is equivalent to the access switch in our usual network. The PON network is a passive optical network. The reason why it is said to be passive is that the optical fibe...
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