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LPS for Optical Network Terminal (ONT)

We have fiber coming into our home with a Nokia ONT/Router combo and I want to add a LPS for streaming. The ONT presently has a wall wart providing  12V, 3A to power it.  Can I  just splice in a standard   US NEMA   plug to the existing wire for connection to a LPS, or, do I need to purchase some specific wire  (which already has an ONT connector) to go  between a LPS and the ONT ? 

I know this sounds extremely simple but I just want to make sure the rewiring doesn't screw things up due to my overlooking something obvious.  I can be very good at overlooking the obvious   😥

Thanks for any insight,

 

brskie

Showing 2 responses by mitch2

mitch2
3,696 posts
 

If your goal is to power your router with a LPS, then you need to purchase a LPS that delivers 3A of current at 12V DC.  The LPS you purchase should come with a DC power cable to connect the LPS device to your router, and it should also come with an AC plug/cord to connect the LPS device to the duplex in your wall.  Not sure why you would want to splice in a NEMA plug.  Others can address the potential benefits, or not, of using a LPS for this purpose.  FWIW, all my network items including modem, router, and peripherals (such as converters and switches) are powered using LPSs.

mitch2
3,696 posts
 

I thought I saw that connection when I googled your device.

From the picture, it appears that the A connection is the +12 VDC and the B connection is the - or return.  Looking at the connector raises the question whether this device has an internal battery back-up?  

Regardless, all the external LPSs I have used transform AC to DC and output two wires to a barrel connector, XLR connector, or two-pin connector.  I have put together cables for this a few times and I use a volt meter to determine which of the wires, and which part of the connector, is positive and which is negative.  On barrel connectors the inside pin is typically positive and the outside of the barrel is usually negative.  In this situation I would probably ask, "what problem are you trying to solve?"  If it were me, I would leave it alone and use the PS provided, running off of a circuit different from what powers your audio system.  Others here may have a better solution. 

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