Why is the optical modem WiFi signal so weak? Built-in antenna and low transmitting power are natural, four remedies and a stop loss line

My mother-in-law’s family complained online for half a year: The WiFi in the living room is full, but only one is left once you enter the bedroom. When you scroll through videos, the video call becomes stuck in a slideshow. The installer came to visit twice and both said, "The network is normal because your wall is thick." I didn't give up, so I held my laptop and tested it all night at her house. Only at night did I realize that the problem wasn't on the wall at all - her house didn't have a router at all, and all the WiFi in the house was ChinaNet, which was sent by optical modem itself.

I figured this out later. The weak WiFi signal of the optical modem is not a problem with your home wall, nor is it a trick of the operator. It is a shortcoming of this type of device brought out from the mother's womb. This article breaks down the reasons and explains them clearly, and then gives me four remedies that have been tested and effective. They are sorted by the amount of money spent. The trick that doesn’t cost a penny is ranked first. If the bedroom is still the same after trying all four moves, it’s time to cut your losses and don’t waste any more time.

Understand first: optical modem’s WiFi is weak. What are the three weak points?

The first place is the antenna. If you look at the router at home, there are four or five antennas on the edge. They are external antennas, and the gain is generally 2dBi to 5dBi. As for the optical modem, there is no antenna on the case - the antenna is all soldered on the circuit board and hidden in the plastic case. I have dismantled a retired Huawei HS8145V5, and the onboard antenna is two pieces the size of a fingernail. What's going on with the gain of the external antenna? I'm Router antenna gain dBi article I’ve broken down the principles here and put it simply:: The gain is low, the energy is spread out in all directions, and the cost of penetrating the wall is low. The country has hard standards for transmitting power, and routers and optical modems are not allowed to exceed them. No one can help anyone on this point, but in terms of antennas, optical modems are inherently shorter.

The second point is positioning. The main business of optical modem is photoelectric conversion and registration certification. WiFi is included. When engineers designed it, they did not expect this WiFi to provide whole-house coverage. In the compatibility list of Huawei terminals, the WiFi band number of this batch of home gateways is rated at ten units. Signal coverage and band band are the underlying capabilities that are connected together. I judge this Is the built-in WiFi of optical modem enough? That article was actually tested for a month, and the conclusion is that it can be used with less than ten devices placed in the living room. ； After crossing this line, the chain starts to fall off.

The third most unfair place is the installation location. The optical modem has to follow the optical fiber entering the home. The optical fiber comes in from the weak current box, so the optical modem can only be stuffed into the weak current box. The tin box itself is a shield. I tried the same optical modem at my mother-in-law's house.: Place it on the TV cabinet in the living room, with two signal bars in the bedroom ； After stuffing it back into the weak current box, the bedroom fell directly to the edge of a grid. The only thing missing is this iron door. With three shortcomings stacked up on top of one, it is difficult for the optical modem WiFi to be weak.

The first move is zero cost: First make sure the signal you are saving is really a optical modem.

Do one thing first before taking action, don’t do it in vain. Take out your mobile phone and look at the WiFi list. Does the WiFi with weak signal in your home have a name starting with ChinaNet? Yes, that was indeed sent by optical modem, go down. If you came up with the name yourself, it was sent by the router. There is another way to troubleshoot the poor signal of the router. Don’t try too hard on the optical modem. This judgment is a one-sentence matter, but my neighbor spent a week struggling to find out that he had been correcting the wrong equipment.

After confirming that it is a bare cat, there is a zero-cost inspection.: Open the WiFi details of your phone to see whether the connection is 2.4G or 5G. The 5G frequency band is fast but has poor penetration through walls. If a mobile phone clings to 5G in a bedroom separated by two walls, it is normal for it to be weak. Separate the two frequency bands and name them. Whichever grid has more grids is connected to which one? I am Tianyi gateway dual-band settings are set separately That article wrote about the steps. The priority is to connect to 2.4G in long-distance rooms, which is slower, at least it won't drop the call.

The second move is still zero cost: Change the channel and start at 11 or 12 p.m.

optical modem's WiFi is weak. It is often squeezed out by neighbors. It's not because of insufficient power. The 2.4G frequency band is only so wide. Routers from dozens of households in a building are all crowded in, and the same channel will trample each other. Your signal grid will not change, and your speed will be trampled long ago. Take a quick look at the WiFi analyzer app on your phone. If the channels of your home optical modem and those of your neighbors are all on the same number, changing the channel will have immediate results.

Specific changes to the law: Connect your phone to optical modem's WiFi and enter the browser 192.168.2.1 , log in with useradmin on the sticker, look for WLAN settings in the network menu, and change the 2.4G channel from automatic to one of three numbers: 1, 6, or 11 - only these three channels do not overlap each other, and whichever number is used by fewer people during scanning will be used. I am following the complete process of this step. How to change the WiFi channel of Telecom optical modem That article was thoroughly written. After changing it and comparing it during the peak hours in the evening, I found that the lags were reduced, which is half the problem. Why did you choose to start at eleven or twelve o'clock in the evening? The moment you change the channel and save, the WiFi will be disconnected for more than ten seconds, and no one will scold you when everyone in the family is asleep.

The third move is dozens of dollars: optical modem, please stop boring the weak electric box and find a way to please come out.

Forget about the position of this link. If the iron box eats one signal, if you take it out, you will pick it up for nothing. The most trouble-free way is to use the optical modem itself - pull a network cable from the weak current box to the TV cabinet, place the router in the living room to send WiFi, and the optical modem can quietly do its job in the box. There are four ways to take this route, including cold splicing, extending the optical fiber, and asking the master to splice the fiber. The price ranges from 0 yuan to 100 yuan. I am here The article about the optical modem moving its position The disadvantage is that if you go through it one by one, the fiber will be coiled, and the bending radius is less than 5 cm, which means chronic breakage.

If pulling the cable is really troublesome, there is a trick: The optical modem WiFi is left in place as a "weak current box peripheral network", and the main WiFi is handed over to a router. How to place the router and how to separate the antennas is much more knowledgeable than that of optical modem. I have put four antennas at an angle and put one at an angle. How to place router antenna That one was a demerit. If a router cannot cover a large house, add a Mesh sub-router and place it near the signal blind spot. The actual measured data of the eight points is as follows: Mesh sub-routing placement article , according to the selection of seats to save moving back and forth.

The fourth trick is the stop loss line: If all three signals are over the line, don’t save me.

I have drawn three lines for myself when it comes to remediation. If the line is crossed, it means that optical modem WiFi has come to an end. Any further trouble is a waste of time.:

• There is a solid wall between the living room and the bedroom, and the signal drops below two bars - the antenna gain cannot be compensated. This is not a setting problem.
• During the peak period of 7 or 8 pm, the measured speed was only 20 to 30% of the nominal broadband speed. I tried changing channels and frequency bands once - the machine capacity reached the limit and the hardware ceiling was reached.
• There are more than ten devices in the home, and the speaker and sweeper start to disconnect sporadically. Restarting the optical modem can make it better for one night - this is a typical symptom of the machine being at its peak, and the rescue signal cannot save it.

One of the three suggestions, my advice is: Turn off the optical modem WiFi to prevent the phone from repeatedly jumping between the router with poor signal and the router with good signal. Guan Fazai How to turn off WiFi on Telecom optical modem In that article, there are two ways to use the web backend and Xiaoyi Guanjia App, and useradmin permissions are enough. The phone always stuck to ChinaNet, and my mother-in-law’s house was disconnected that night.

Turning off optical modem WiFi does not mean wasting the machine. optical modem's own photoelectric conversion and registration certification are still running, and the WiFi module is simply turned off as a bonus function that cannot be used. If you have an old retired optical modem at home and want to reuse it, you can also use it as an AP to send WiFi. I’m here The article about Jiuguangmao being an AP After stepping on three pits, I looked through them with interest.

wrap up: Go in this order, don't skip steps

Arrange the four moves into an execution order list, follow it from top to bottom, and check each step once. If it fails, go to the next step.:

The last step my mother-in-law’s family took was to add a stop loss in step 4.: The network cable was pulled to the TV cabinet, the old router was connected, and the optical modem WiFi was turned off. Now the bedroom is full and the video calls are smooth. When she meets everyone, she tells everyone that her son-in-law has fixed the internet. In fact, it is not repaired, it is to return the WiFi to the machine where it should be sent. Regarding the weak Wi-Fi of optical modem, you should recognize the inherent shortcomings, use the zero-cost tricks first, and replace the work as soon as the stop-loss line is passed, without spending any money.