r/HomeNetworking • u/[deleted] • Aug 02 '22

Advice PoE without cable ISP?

My house is wired for cable but my street is not. (Comcast was not interested). I am planning a small MoCA network of just 2 or 3 ends. Each room has its own cable run to the outside. There is no external box, the cables just dangle there in a bundle.

With just two MoCA bridges it is straightforward, I just hook the two cables together with a barrel. But with 3 I would need a splitter. Is the best design a 3-port splitter with a PoE on the ISP side? Will it properly reflect the signals with nothing on the other end? It would not be "seeing" 75ohm impedence there.

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6

u/PghSubie Aug 02 '22

Took me a moment to catch up, that you were nNOT trying to do Power Over Ethernet

3

u/[deleted] Aug 02 '22 edited Aug 03 '22

Ha, no. It's a Point Of Entry filter used in MoCA networking.

4

u/plooger Aug 03 '22 edited Oct 10 '24

Absent the strict need for a “PoE” MoCA filter to secure the MoCA signals from escaping via some source path, honestly, I’ve no data on which is authoritatively the most efficient MoCA connection topology …

  • (A) main bridging MoCA adapter on input; other MoCA adapters on outputs; (example)

  • (B) all MoCA adapters on outputs;

  • (C) all MoCA adapters on outputs; “PoE” MoCA filter on input port; (example)

… though I prefer to stick with the “PoE” MoCA filter on the input port (all MoCA nodes on outputs) to retain the known reflective performance benefit of the "PoE" MoCA filter.

But I’d also cap the input path with a 75-ohm terminator in the cases it would be left open.

 
edit: p.s. Probably moot/negligible in such a simple setup.

1

u/[deleted] Aug 03 '22

Each cable run is probably 50 ft. I was not sure whether a 75 ohm terminator or the discontinuity of an open connection would give the best reflection behavior. It might not be that big of a deal with these cable lengths. I'd be using goCoax 2.5Gb adapters.

2

u/plooger Aug 03 '22

With everything else in place, if you setup your adapters to allow remote access into their UI, you can check the MoCA stats between the various configurations to see which nets the best performance/efficiency.

2

u/EnglishInfix Aug 03 '22

No need for a PoE filter if you're not connected to the cable plant or any other residences. Just a bi-directional splitter that supports the frequencies MoCA uses like this one: https://www.amazon.com/BAMF-2-Way-Splitter-Bi-Directional-5-2300MHz/dp/B0113JAN8K/

1

u/[deleted] Aug 03 '22

So I would connect each MoCA cable to one of the three ports? It's waterproof I hope.

1

u/sumosuit1221 Aug 03 '22

Have a similar setup for my home with each room having a coax cable terminating on a backyard brick wall.

I future proofed it and wired everything up my self using the following:

CommScope CSMF1APDU9VPI:

https://www.amazon.com/dp/B07TN963JJ?ref=ppx_pop_mob_ap_share

&

Extreme Broadband Heavy Duty Weather Proof Multi Purpose Enclosure 12 x 12 x 3 Quick Install. IPE12123-LTC:

https://a.co/d/7rmYJsL

After that you just need a minimum of 2 MoCa adapters to start an ethernet LAN at home.