Installing a smart doorbell using cat5


Old 09-14-20, 04:02 PM
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Question Installing a smart doorbell using cat5

Hi all,

So the home we just bought has an intercom system using cat5 that terminates in the smartpanel (home is 6 years old). As far as i can tell, it terminates in a black box that has a 'phone' out, which i think they plugged a phone into so they could answer the front door intercom on any (wired) phone in the house. I got a free Skybell slimline doorbell ( from a friend and want to install it.

It needs a doorbell of some sort (mechanical or digital) and Power: 8-30VAC, 10VA or 12VDC, 0.5 to 1.0A. My friend gave me a 12VDC plug/converter, so i can go from the AC in my home to 12V DC....I was then going to double up the cat5 cables (like twist two blue together and two orange together) and connect the 12V power supply to the cat5 cables doubled up to get enough power to doorbell. I think this will get enough power to the doorbell, does anyone see any issues with this?

The other side of it is that I'm missing a doorbell, so i was going to buy a 12v wired electronic doorbell and install that too ( and a digital doorbell adapter (https://skybelltechnologies.zendesk....-I-install-it-)

I'm just struggling to imagine the wiring my head, i plug the 12v converter into a power outlet, which probably gives me a red and white wire w 12v volts power, which needs to be connected to the two pairs of cat5 wire to give doorbell power, but where i splice them together, do i also splice in the digital doorbell at this point as it needs power too...and I'd think that the digital doorbell has to get a signal from the smartdoorbell to tell it to ring, so how does this come in? Any help would be appreciated



Last edited by PJmax; 09-14-20 at 10:12 PM. Reason: labeled diagram
Old 09-14-20, 10:07 PM
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Welcome to the forums.

It would be easier to just use a mechanical chime unit. Then you wouldn't need a current flow adapter.
Your power supply needs to match the chime. Most of the chime units are AC.... not DC ..... which means you'll need a different power supply. Typically 16.5v AC

Your current doorbell button wiring terminates at the "smartpanel". Your power supply will also be at this location. Will your chime unit also be in this same location ?

Your "system" is three parts..... the transformer, the door unit and the chime. They are in a series loop. Based on needing an AC adapter..... there is no connection polarity. I added some color to your diagram.

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