Hello, everyone!
Today, I will continue to write about the Huawei campus optiX solution. In the last article, I introduce OLAN solutions. Now, the topic is POL. Let’s get started.
As I wrote in previous articles, POL stands for Passive Optical LAN. It is a new LAN technology based on PON technology. POL can use different PON standards, but typical is GPON or XG(S)-PON standards.
What does the POL solution provide?
1. simple network - one optical fiber for multiple services.
2. reliability - ODN is a completely passive part of the system, the active elements are in the main room and in the work area.
3. flexible - a single system with a centralized monitoring and management system. Huawei usually uses eSight as NMS software or cloud solution.
PON system consists of:
OLT (Optical Line Terminal) - the most important element of the system, which is located in the main or computer room and on which ONU devices are connected via ODN, in order to ensure the transfer of service.
ODN (Optical Distribution Network) - a completely passive optical network whose task is to connect OLT on one side and a large number of ONU devices on the user side. ODN consists only of passive elements such as optical splitters, optical connectors, patch panels, etc and optical cables. The ODN in campus networks consists of the main vertical links, then the horizontal links and finally the patch cord for connecting the ONU to the work area.
ONU (Optical Network Unit) is a device whose task is to convert an optical signal into an electrical signal and vice versa. It has various interfaces that provide service: data, video and voice. The ONU in FTTH solutions is called ONT (Optical Network Terminal).
PON system elements, we can see in the next figure.
This is the end of this topic. I will continue to write about POL in the next article >> Huawei Campus OptiX Solution (4): POL.
Thank you!
