Good afternoon, dear readers of the blog site. If your Internet cable (twisted pair) was gnawed by a dog or cat, it was transferred by furniture or was damaged in another mechanical way, then it can be restored without loss of aesthetic appearance and functional characteristics. Many, remembering the grandfather's way, in the old fashioned way, resort to twisting the cores and further winding with electrical tape. However, in this way it is not permissible to repair the Internet cable.
This method is well suited for breaking the power cable of devices and devices. Any twisting of the twisted pair cores is additional interference, loss of data packets that you can then feel during operation (speed reduction, communication breaks, etc.). By resorting to twisting, you lose the data transfer rate by an order of magnitude.
This article will describe a method for repairing an Internet cable in the event of a break in the area from the entrance to the apartment to connecting the device. If you have damaged or broken the connector, then you can read about its repair in a separate one.
This situation can also occur with the cable from the antenna. Therefore, I recommend that you read the article dedicated.
Required tool
To repair a damaged twisted pair, we need a few tools:
Cable stripping and cutting tool (stripper)
The stripper is needed to remove a certain piece of external insulation, as well as cut off the excess length of the wires. A knife can also be used to remove the insulation. However, be extremely careful not to damage the integrity of the cores.
Wire connector (scotchlock)
You need as many scotchlocks as you need to splice.
Connector crimping tool
If there is no such tool, then you can get by with simple pliers. However, as with a knife, you need to be careful, otherwise you can damage or crush the connector.
Internet cable repair (step by step)
To begin with, with the help of a stripper, we remove excess insulation in order to free the cores from it (about 2 centimeters). We untwist twisted pairs, for further simplicity of their installation in the connector.
Now, one by one, we take the cores of the same colors from different pieces of the cable and insert them all the way into the connector holes. Then we snap the scotchlock by pressing two fingers. Using a connector crimping tool, tighten the adhesive tape completely and then the wires will definitely not fall out. This operation must be carried out in turn with all the cores.
As a result of repairing the Internet wire, you will get a small bundle (as it looks like, see the figure below).
It is recommended to wrap this place with electrical tape for additional protection. But before finishing, I advise you to check your work and make sure that the Internet is working. To do this, you need to insert a compressed twisted pair cable into the connector of the device through which the network is organized (desktop computer, laptop or router). If everything works without failures, then you can safely protect the place of repair of the Internet cable.
I advise you to read the article about. Such a need may arise if you are going to redevelop the premises and the equipment will be moved to another location.
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DSL-2500U. The owner of this modem complained about the constant dumps of the Internet, if not at all connection failures. And indeed, turning on the modem, I found that the modem was not available even via Ethernet, although the lights blinked as expected.
First, we determine whether the 5V power supply is to blame. We measure the voltage with a multimeter - deviations are allowed plus or minus 10%. If there is a suspicion of a power supply, then carefully disassemble it and change swollen capacitors. Usually this C9, C10, sometimes C3. If the power supply is beyond suspicion, then we disassemble the router. Loosen four screws under glued legs.
Replacing capacitors in the D-link DSL-2500U modem
Under the cover of the router we see an electronic board with swollen capacitors. Capacitors usually overheat and lose capacitance C8 - 470uF x 16V, C14 - 100uF x 16V, C32 - 470uF x 16V, C111 - 470uF x 16V. We change them to capacitors of the same or larger capacity. 
Capacitor C14 is better change to 220uF. 
As a result, the repair was successfully carried out modem D-link DSL-2500U - it began to work stably. It looks like the power ripple due to the low filter capacitance overlaps the data signals and breaks the synchronization. Hence the loss of communication and unstable operation of the modem. 
Other malfunctions of the D-link DSL-2500U modem
Also, sometimes, the microcircuit fails. U2 Broadcom 6301KSG. Found a solution to this problem. The source states that the chip can be replaced by AD45048.
Which in turn is quite simple replaced by assembly on your favorite KT315G and MLT-0.125 430 Ohm resistors. True, due to the spread in the current transfer coefficient, it is necessary to select resistors for a stable Internet speed. Also transistors can replace with C945, and resistors can be selected up to 20 kOhm. 
Among other frequent malfunctions of D-link modems, there is often a breakdown of the external power supply. In this case, communication with the network may also be lost and the modem itself may periodically fall off. In this case, the repair will consist in replacing the filtering electrolytic capacitors in the power supply.
This completes the note about the repair of the D-link modem DSL-2500U. I hope that your modem will work stably for many years.
Not sure how to fix a broken modem? You will learn about this from this article. Repairing a modem is actually quite a difficult task. Some users make a big mistake by underestimating the difficulty of this action. Probably my advice may seem unusual, but it makes sense to ask yourself: is it even worth repairing a failed modem? Maybe it would make more sense to buy a new one? I personally tend to think it makes sense to ask how much a new modem costs. To do this, simply make the necessary request to google. First of all, it makes sense to look for a modem repair specialist. This can be done with yahi or mail. ru, newspapers of free announcements. If you can afford the price of repair services, we will consider the issue resolved. If not, then you will have to repair the modem yourself. If you decide to repair it yourself, then first it makes sense to learn how to repair the modem. To do this, you can use some kind of search engine, or review the issues of the magazines "Skillful Master", "Master-Lomaster", "Young Technician" and the like, or go to the thematic forum. I hope this article helped you solve the problem. Visit our website often to keep abreast of all current events and useful information.
Copyright (c) 2013, Thematic catalog of articles
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Repair received USB modem ZTE MF627
with the declared malfunction - not installed. Trying to install:
Installation takes about a quarter, after which a message appears:
\Data\data2.cab The volume for the open file has been modified externally, so the file cannot be used.
Well, I will describe the sequence of actions for recovery:
1. Download this one. It contains - firmware for MTS, drivers for the USB modem and the installation archive of MTS Connect Manager.
2. Install MTS Connect Manager from the archive.
3. Install drivers for ZTE WCDMA Technologies MSN.
4. Then we run the firmware file and press the "Download" button (if it is not active, then not all drivers are installed - everything is in the archive, try installing others).
5. The firmware has started. After completion (it took me 11 minutes to install the firmware), the following window should appear:
6. Remove MTS Connect Manager (do not forget to remove the modem from USB first). Then we plug in the modem and try to install MTS Connect Manager already from the disk located in the USB modem. Installation proceeds normally, no windows with errors appear. When the installation is completed, the following window is displayed:
All devices in the system are normal:
Everything works great.
All photographs were taken with a Kodak EasyShare C1530 camera.
By the way, Megasimka, an automated online store for SIM cards and tariffs, is best for getting unlimited Internet for a USB modem. It has a large selection of SIM cards of various operators and tariffs. Choose what suits you best and use your USB modem. It has always been interesting to try to open your own online store, albeit not fully automated, but everything doesn’t reach your hands, before installing some kind of WordPress plugin or just some kind of online store script. I would like to make a store of components for electronic equipment - to sell transistors, resistors, capacitors, microcircuits. I just analyze the prices in my hometown for spare parts and am horrified - the prices differ from the prices for aliexpress at least three times, and for individual items up to 20-30 times. It's just beyond profit. I understand that money is invested in a product and is a dead weight if no one buys this product. But not 30 times. A spare part worth 1 ruble to sell for 30? This is superprofit in its purest form. Another option, I want to try to sell fitness bracelets, it seems to me that this is a very relevant topic now. It is necessary to do, but with this I, as always, have problems - there are many words - there are few deeds. Okay, I digress. Bye everyone! See you on the site!
