We integrate a DSL modem into the PC system unit

And so, many owners of ADSL modems have encountered a problem when the modem has nowhere to put it, or it overheats, or is simply distracting with its flickering. I suggest putting it in the system unit case; of course, you can secure it to the table, but in this case it will be difficult to look at the indicators if something happens. In the system unit, the modem is cooled by fans, there is no need to run wires far, and we also completely eliminate the power supply.

Let's start by first taking a look at the modem connectors. I have a D-link modem DSL model - 2500u

Let's go from bottom to top, gray is the telephone line, yellow is the LAN cable (connection with the PC), and black is the power connection.

Next, you need to find a place in the body of the unit, a place under the drive or like mine above would be perfect, carefully remove the plugs, they are held on by plastic latches, this is what should happen. Don't pay attention to the holes, these are the consequences of unsuccessful modding...

In order not to pull unnecessary wires, we exclude the power supply; it will perfectly replace the computer's power supply.Before replacing, you need to look at the modem's power supply so as not to make a mistake with the voltage and not burn the modem. On my power supply 5 V and current 1 A it is written like this: Output: 5V 1.0A DC if everything is like this, then feel free to open the case of the system unit and look inside for such connectors

This connector connects to hard drives, floppy drives, etc. but on almost any power supply you can find free ones. And so we need the red and black one that next to it there is just a voltage of 5 V and a current of 1 A can be produced by even the simplest power supply.

Cut the wire from the modem power supply

And connect it to the computer. The wire with the stripes is +, the other is -, respectively red +, black -

We isolate and everything is ready. All you have to do is run the rest of the wires through the back and you're done.

The local network wire immediately returns to the system unit and as a result, only one telephone line wire comes from it.

This is what happened, everything is neat and accessible for review.

For those wishing to repeat, good luck.

P.S. The author does not bear any responsibility for careless hands and broken equipment. And when you remove the cover of the system unit, you automatically lose the warranty.

come back

Similar master classes

We disassemble the DSL modem

Antenna for 3G modem.

Laboratory power supply

Simple tri-voltage power supply

Compact regulated power supply 24V 5A

Battery charger from laptop power supply

Particularly interesting

Glowing LED tubes

About contactless power supply of LEDs on cooler blades

Homemade vibration function for a computer mouse

Battery replacement plus possible modding

Modding the system game "Endless Void"

Control Panel for PC

Comments (18)

#1 NOTFRONT Guests July 2, 2011 11:55
0

You still need to build a small fan there!
- Answer
#2 feelloff Guests 2 July 2011 14:43
0

Yes, the modem gets too hot.
- Answer
#3 SERJIK Guests 2 July 2011 22:06
0

convenient but could be more careful
- Answer
#4 Veent Guests 3 July 2011 23:07
0

Well, I don’t know what the calculation is, there are blow-out fans, which means the sucked-in air will blow over the modem. But I think one more small one won't hurt
- Answer
#5 tutykh Guests August 5, 2011 00:21
0

You've just reinvented the wheel! This is a built-in modem!
- Answer
#6 Veent Guests August 5, 2011 09:27
1

Well, first of all, I just invented a bicycle with a fifth wheel. Well, the trick is that the modem was not originally built-in)) I didn’t notice the built-in ADSL
- Answer
#7 Velizar Guests 23 October 2011 22:53
1

It should be added that when the modem is turned on in this way, the likelihood of the modem failing will increase significantly... When the modem had its own power supply, there was a galvanic isolation from the mains, when connected in this way there is no isolation (since the computer power supply is transformerless), when there will be a thunderstorm, it will simply burn out (the input module from the telephone network will shoot out inside) .
- Answer
#8 Veent Guests 24 October 2011 20:02
0

Here you are mistaken, any computer power supply has a transformer (on a ferite core) and, accordingly, an isolation, there is no contact with the 220 network except through light rays (optocoupler) there. Everything, as they say, was invented before you.
- Answer
#9 Velizar Guests December 13, 2011 20:08
1

This is where you go wrong!!! In a computer power supply there is an input filter on two capacitors that are connected in series, the connection point of the capacitors is connected to the case. If the computer is connected to a network without grounding, then an alternating voltage of ~115V hangs on the PC case (take a tester and see for yourself...)
- Answer
#10 Veent Guests December 13, 2011 20:20
1

And what do we get, let’s say we have this voltage on the case and where does it go? There is an isolation there and these 115 V will remain on the body, there is no potential difference. It can go into the ground (One hand on the system unit, the other on the battery). It’s a very unpleasant feeling; nothing will happen again.
- Answer