The Telecom optical modem sticker hides the backend key. The string of SN can save lives at critical moments.

When I accompanied my mother-in-law to the business office to log out the broadband, the first thing the teller asked was not the name of the owner, but "Have you brought the SN number of the optical modem?" I pulled out the photos saved in my phone and read them to her. I matched the number in twenty seconds and left. ； The elder brother in front of me didn't take the sticker, and the optical modem was deep in the weak current box at home, so I was persuaded to go back and get it a second time. On the way back, I thought about it. I had been staring at this sticker for so many years, but I had never really understood every line of text on it. It wasn’t until that day that I discovered that there were several fields that I couldn’t tell what they were for.

Later, I turned over all three optical modem I could take pictures with and took pictures again.: My current ZTE F7015T, my cousin’s retired Huawei HS8145V5, and the second-hand TEWA-750G I bought for fifty yuan. If you look at the three stickers together, the pattern becomes clear. This article explains the purpose of each line, when it can save a life, and how to replace the sticker if it disappears.

Make it clear first: optical modem stickers and router stickers are not the same thing

The router stickers are basically printed on you To see: Management address, default password (the new model does not even have a default password, I have written specifically about how to check the model number and hardware version. ). The stickers on optical modem are different, half of them are for operators to see. SN codes, MAC addresses, etc. are tied to your broadband account in the operator's system - the optical modem is their asset, and the sticker is the "driving license" of this asset.

So if you lose the router sticker, you will at most be unable to enter the backend. If you lose the light mode sticker, it will really block people when doing business. Three real-life scenarios I have experienced: To reset the password remotely with No. 10000, the customer service will ask you to report SN to verify that you are using it. ； After logging out and dismantling the machine, the business hall collected the equipment facing the SN, but the number did not match and they refused to recognize it ( I have carefully calculated the account for the cancellation trip. ) ； My cousin wanted to go to optical modem's backend to change the WiFi. When he turned over the machine, he saw that the sticker had become a dark green mass due to moisture, and the password line was completely missing ( It took five steps to retrieve the password that time. ).

Recognize the Five Elements characters one by one: What exactly is printed on a sticker?

The sticker layouts of the three machines each have their own arrangement, but the fields cannot escape the following ones. I list them in order from top to bottom:

There are two lines that are easy to miss. One is MAC address , usually a small line of twelve letters and numbers, which is not used at ordinary times. Customer service will ask for it when reporting a fault in some provinces. Just take a photo and bring it with you. By the way, SN and MAC are two different things.: SN is the serial number of the whole machine, one for each optical modem ； MAC is the hardware address of the network interface, and there may be several printed on it. Just tell the customer service whichever one you want. Don't mess around with the number. If you misread the number on the other end, you'll end up waiting in line for a long time. The second is Wireless default name and password , ChinaNet - the group at the beginning - this line is the factory state before installation. The master will usually change it after the installation or you will change it yourself later ( Here’s the process for changing your WiFi password ), so the password on the sticker is most likely no longer the current one, so don’t use it to connect to the Internet.

There is one exception to know: For older models of Optical Mouse before 2015, the super administrator account is printed on the sticker, and there is no password line for the ordinary account useradmin. If the machine at home is an antique, you can't find the "Default Terminal Configuration Password" when you look through the sticker. It's not because it was printed wrong, but it wasn't printed that way at that time.

When does each string of codes help?: I will deal with it one by one according to the scene.

When dialing the 10,000 number, SN is the pass. When resetting passwords remotely, filing a fault report, or checking package bindings, the first sentence most customer service says is "Report the SN code on the sticker on the back of the optical modem." There was a time when I stopped my computer after paying off the arrears but didn't restart it. I called and the SN was reported, and the customer service took two minutes to issue the instruction to resume my computer ( I wrote the complete story of the payment arrears. ). With SN in hand, many things can be done with just one phone call, eliminating the need for a trip to the business office.

To enter the backstage, rely on the small letters of the password. Add the address, useradmin, and the password on the sticker, and you can enter if you put all three together ( Can be operated on mobile phone ). This line of text is random, one for each phone. If you make a few mistakes in it, your account will be locked, so don’t try blindly and copy it correctly.

Change the cat, buy the cat yourself, and recognize it as LOID. In provinces with LOID certification, new cats must rely on the logical identification on the sticker to register in the computer room. If there is one character difference, it will report "ITMS platform does not have this LOID" ( This is how my second-hand TEWA was registered. ). Provinces without LOID use SN certification, and then SN is the lifeblood.

The model number is the key to finding all information. Firmware version, background menu, flashing tutorial, and the model number when searching have completely different results ( I have written about the optical modem firmware. ). More to watch when buying and selling second-hand goods: Whether it can be used across operators, whether it is GPON or EPON, you can check the model number ( I used two cats to interoperate with each other for one night ).

Why can’t you find the super password on the sticker?

Many people look through the stickers for the telecomadmin group of super-managed accounts. They look through every line and find nothing, and then they suspect that they are lame. It's not because you are blind, the super management password is not printed on the sticker - that is the authority left to the installation and maintenance master by the operator. Each province has its own password for each model, so you have to find another way to get it ( I wrote a separate article about that set of acquisition procedures. ).

For daily changes to WiFi, checking light failure, and kicking devices, useradmin is enough, so there is no need to worry about super management. If you really want to make such a big move as changing bridging, you must first think clearly whether it is worth it ( I have analyzed the pros and cons of bridging. ), don’t bother the machine until it can’t get up just for a password.

Three ways for stickers to die, how to repair them if they die?

I've seen all the ways stickers can die.: The weak current box was mushy with moisture (the one at my cousin’s house had all the words smeared into pieces), it was easily torn off when moving, and the weak current box was rubbed and rubbed. Remediation is ranked from lowest to highest cost:

The first move, Take a photo with your mobile phone's flash at an angle , and then zoom in. The soaked sticker looks like a dark green mass when viewed from the front. With side light, the words in the indentation can often be made out about 70% to 80%. As for the password at my cousin's house, I had to look at it sideways to recognize the first four digits.

The second move, Work order or text message for flipper . Most of the work orders on the day of installation had SN written down, and occasionally there were text messages about broadband activation. If you can't find it, go to No. 10000 and report the name of the machine owner and installation address. Customer service can check the registered equipment information.

The third move, There is actually another copy in the background . Use an account that can log in to "Status→Device Information". The model, SN, and MAC are all written there, which is the same set of data as the sticker. The premise is that you can still log in - so you have to do this while the sticker is still there and the password has not been forgotten.

Three things to do now, two minutes

After all, the best solution to the sticker problem is not to replace it after losing it, but to save it while it is still intact. It should be taken on the day of installation ( I included it as a must-do item in the installation acceptance list. ), it has been installed for many years, and now it’s still time to take another photo:

The first is to take photos. Create a "weak current box" folder in the photo album, and throw all the stickers, WAN connection tables, and installation work orders into it. Remember to move it when you change your phone. ； The second is to hand-copy three things—broadband account number, SN, and backend password—on paper and stick it on the inside of the weak current box cover. Paper is the most reliable when the phone is out of power. ； The third is to put a plastic on the sticker or cover it with a piece of transparent tape. This is the most simple and effective method to prevent moisture, especially in the south and the first floor.

Also give me a sequence: First, take a photo of all the stickers, then go into the backend and take a screenshot of the "Device Information" page (in case the stickers are gone later), copy three pieces and stick them on the box cover. When replacing the old machine with Mao, remember to file the sticker information together ( Here’s how to reuse old optical modem ). This worthless piece of paper is more valuable than the router itself at critical moments.