Cant figure out why the OLT optical modem device has its own wireless WiFi and why it needs to be connected to the router for the mobile phone?

Using wireless WiFi saves money and the internet speed is fast, so most of the current friends at home choose to use the wireless router at home to provide WiFi signal, because this is the most economical way to get online, but many netizens still have a doubt , The current optical modem configuration is also quite good, the wired network ports are all Gigabit, and there is a 100M wireless network, which can completely connect the mobile phone to WiFi, but why do most families buy a wireless router? Isn't this a waste? Many people are still a little confused.

The current wireless routers have two frequency bands of 2.4 and 5.0, but the wireless frequency band of the optical modem is 2.4GHz, which does not have the 5GHz frequency band. Due to the cost of the optical modem, the routing capability of the optical modem is not good. The installation location greatly limits the wireless network speed. How to understand the optical modem only has the 2.4GHz frequency band, the router performance of the optical modem, and the installation location of the optical modem? Let's analyze it together:

Optical cat only has 2.4GHz frequency band, the interference is extremely serious

The main function of the OLT optical modem equipment is the optical-electric conversion equipment. Due to the limitation of cost, its wireless frequency band is limited to the 2.4GHz frequency band, so the channel is limited to 1-13 channels. Both the 2.4G frequency band and the 5G frequency band of WLAN belong to the ISM frequency band, and they are all license-free, in other words, they are all free.

The job of OLT optical modem is photoelectric conversion, not routing, so the hardware performance of this part of routing is not high. For the user end (facing the router), the electrical signal used by the optical modem, and for the upper-level computer room side, the optical modem uses the optical signal, and the role of the optical modem is the optical-electric signal conversion.

This process does not require much powerful hardware performance, low-end processors and a small amount of memory can handle it, and optical modems are generally leased to users for free. In order to reduce costs, operators will try to use cheaper ones as much as possible. hardware. So compared to the hardware circuit responsible for the routing part of the optical modem, its hardware configuration is very low.

The router function of the OLT optical modem device was originally the responsibility of the router. The reason why the router is manufactured by major manufacturers is because the dial-up routing function in the OLT optical modem device is only incidental, or it is better not to enable it, because After enabling, it will greatly increase the performance load of the optical modem. When working in a short time or when the data throughput is relatively small, the OLT optical modem device may be able to cope with it. Once it works continuously for a long time, the number of cameras is large, or the data throughput is relatively small. When the data volume is downloaded and transmitted, the performance of the OLT optical modem device is not enough to cope with such a heavy task, and there may be phenomena such as unstable network speed, substandard bandwidth, increased network delay, and high packet loss rate.