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Step 6: Troubleshooting

Make sure the cable works:
Find a phone where you can hear the dial tone. Now hang up and replace the line with the cable you plan to use, check to hear a dial tone now. If not then your cable is bad.

Make sure the phones work:
Temporary replace your home phone with one of the project phones, check to hear a dial tone. Then make a call to see if the microphone and the speaker work in the handset. And to see if the handset has a charge if it applicable. If you fail to make a call for any reason the phone is bad.

Make sure the Coupler makes a circuit:
Take the battery out of the coupler. The battery must be out. Then go to a working phone and make the connections in this order

Wall jack------> to cable -------->to the Coupler-------->to another cable------->to phone

This will check if you connected the right wires in the coupler. Pick up the phone and listen you should hear nothing, if you do here a dial tone then the wrong wires are soldered, or you have short in the coupler. If you move the coupler and you hear scratching sounds then you have a bad connection, and must re solder or better insolate.

If you hear nothing that is a good sign so far, now take a screwdriver or something metal and complete the circuit at the 9v battery connector. You should hear a dial tone now. If not then your connection on the red or green is just broken somewhere and you have to find it.

The green wire is just a straight shot; you do nothing with the green. The red wire is in series with the 300 ohm resistor and a 9v battery. Make sure its set up like this. I hpe this was helpful, drink your milk and have fun.
<p>is there a youtube video on this?</p>
<p>how to make it wireless?</p>
<p>This is a great <strong>Instructable</strong>. Will be using this to teach phone skills to my Special Education students - AND it was fun for me to make. Thank you.</p>
Is this wireless? I want to make one for my woods<br>
<p>You could make it wireless, just use two wireless handsets but you would still need to power the receivers, which might be an issue long-term, however I plan to use it to make a cheap reliable walkie talkie kit for airsoft. </p>
<p>It is real nice n easy way thank you,.. could u also put up such easy methods to make a instructable robot,.. plz,... it s real fun learning here to make things of my choice,..</p>
<p>It is real nice n easy way thank you,.. could u also put up such easy methods to make a instructable robot,.. plz,... it s real fun learning here to make things of my choice,..</p>
<p>It is real nice n easy way thank you,.. could u also put up such easy methods to make a instructable robot,.. plz,... it s real fun learning here to make things of my choice,..</p>
<p>It is real nice n easy way thank you,.. could u also put up such easy methods to make a instructable robot,.. plz,... it s real fun learning here to make things of my choice,..</p>
<p>It is real nice n easy way thank you,.. could u also put up such easy methods to make a instructable robot,.. plz,... it s real fun learning here to make things of my choice,..</p>
<p>It is real nice n easy way thank you,.. could u also put up such easy methods to make a instructable robot,.. plz,... it s real fun learning here to make things of my choice,..</p>
<p>It is real nice n easy way thank you,.. could u also put up such easy methods to make a instructable robot,.. plz,... it s real fun learning here to make things of my choice,..</p>
<p>It is real nice n easy way thank you,.. could u also put up such easy methods to make a instructable robot,.. plz,... it s real fun learning here to make things of my choice,..</p>
OMG it actually works. my band has tried different things to talk to each other like walkie talkie and stuffs but this is the best solution. We bought 2 sets of the GE DECT 6.0 follow the instructions above and ..wow.. all 4 handsets can communicate. Now i have to make it some how louder and less noisy. Can I use 12 volt instead? Thanks.
<p>If you're using a set of 4 matching multi-handset DECT 6.0 cordless phones, look in the instructions (if you still have them) for how to set them all up to talk to the same base. If you can do that, you won't need the project this instructable is for...</p>
This hack does not qork in Portugal. I think our phones are different from yours. Our phone line power its 47votls. what can i do?
Here in the States the Central Office provides a nominal 48 VDC . Evedently the cordless base units are happy when presented with 9 VDC, I would expect yours should be too, one volt isn't that much. If you have one use a variable DC power supply use it to determine what voltage makes your units happy.
use a 12 or 7 v lantern batt
also use a 1 ohm 1 of 2 watt <strong>SANDSTONE </strong>ristor in siries<br/>
standalone resistor in series? thats what the spell check is for.
well sandstone is right because its a resistor embedded in stone,with the leads poking out
<p>I'm guessing they meant to say &quot;Sandbar&quot; resistor... They call it that because the resistor is encased in a bar of cemented sand...</p>
I'm using two single slot pay phones, rewired as intercom, for childrens play. I have the power source connected directly to the handsets with a 330ohm resistor. I have audio but with a loud buzz. I've tried w &amp;w/o resistor. all various wiring combinations and varied voltage from 9 - 15 - 24vdc but can't eliminate the buzz that over rides the voice. Is there a fix?
First try using a 9 Volt battery. If that fixes the problem then the issue was your power supply was noisy. The easiest fix would be to use a rechargeable 9volt. There is a way to fix this by adding some high capacitance capacitors to the circuitry, but I don't think I can adequately describe how to do that in a few paragraphs without knowing your setup. <br> <br>Or you may be getting electromagnetic interference from the house power lines which run at 60Hz (US). You can verify this is the case by wiring you're phones along a different path away from power cords and make sure you don't bundle the phone wires with electrical wires. <br> <br>I hope one of these solutions works for you.
<p>If I were to use an AC/DC power adapter, what would be the recommended current rating, and what value of capacitor would do the job if I have hum then?</p>
will hooking a regular power cord up to it, and plugging it into a wall outlet create a ring?
It may ring, but probably blow a capacitor, or catch fire. There is more current than you need. Spark Fun has a great little article and schematic on how to build a ring generator. they use it in a slightly different way but it has all the right gut. At some point I'll adapt it for this project. <br/><br/>Here is the website: <a rel="nofollow" href="http://www.sparkfun.com/commerce/present.php?p=High%20Voltage%20Ringer">http://www.sparkfun.com/commerce/present.php?p=High%20Voltage%20Ringer</a><br/><br/>
<p>If anybody else is looking for that article, it has been moved to:</p><p><a href="https://www.sparkfun.com/tutorials/50" rel="nofollow">https://www.sparkfun.com/tutorials/50</a></p>
does it work without the ring generator?
If you read it it says the ring generator is for the ringer. This does not have any effect on using the phones for the intercom, just the ring feature.
<p>wait, how do you call the other phone?</p>
<p>What about putting a speaker on the other end instead of a phone? Would I need an amp for that portion?</p>
I will try it first <br>
what are you doing with green wire? then?
Nothing, don't cut the green wire.
I really want to make this now, seeing as how I have a ton of old phones. I might use a rechargeable battery though.
Is the flavor of the milk optional? Is there any flavor you suggest? Thanks!
No, you must use Orange flavored milk. If Orange flavored milk is not availible, any citrus or acidic fruit can be used as a substitute.
Does any one know how to use the dial pad if i wanted to use button number 1 to ring/connect me to that phone because i have it conected to my house phone line( Not easy)<br>Any ideas ??<br>
I have no clue what you are doing. How do these phones talk to each other? What are you doing with that battery? Can you do this with two cell phones as these people suggest you can do? http://blog.dialaphone.co.uk/2007/12/13/14-things-to-do-with-an-old-cell-phone/
Can you use more than 2 phones?????<br>
Is 270 ohm 2W OK?
exactly what do the cords connect to? from what, to what?
Thank you for this! It Really Helped Me and my Friend !
Can you do a 4 phone system?
Although I haven't tried it I'm very sure all you need is a triple phone jack.<br/><br/><a rel="nofollow" href="http://www.radioshack.com/sm-recoton-modular-triplex-phone-jack--pi-2459860.html">http://www.radioshack.com/sm-recoton-modular-triplex-phone-jack--pi-2459860.html</a><br/>
How would you configure an intercom with a 3-way phone splitter?
no. That requires a different circuit. <br /> <br /> http://www.epanorama.net/documents/telecom/telephone_intercom.html<br /> <br /> Go here and scroll down to &quot;theatrical intercom&quot;<br />
Nice instructable! I saw this idea in 1988 at a science fair at the local county fair. They used wall power, 12v DC, a regulator, cap to clean the DC from ripple fullwave bridge rectifyer, a sand resistor on each wire from the power supply and ran it in parrallel with the phones in parrallel. Then used the second pair in common phone station wire and created a ring by wiring a doorbell button at each end and a buzzer at each end. worked really well. I went to radio shack and bought most of the parts for the power supply and tryed it. Worked good. Ive also seen this done with a 12v latern battery, everything in parrallel w/no sounder.

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