Picture of How to set up a coax (MoCA) network
Like many existing homes, my parents' home has a limited wired Ethernet network and a wireless (Wi-Fi) network covering the rest. My mom, who has rented Netflix DVDs for a while, wanted to start streaming her favorite shows in the family room and bedroom rather than waiting for disks. Prior to me coming home for Labor Day, they set up an Apple TV on the wireless network. I recommended that they switch to a wired network connection for a faster and more reliable solution.

My parents' Ethernet network is limited to the home office and a small bedroom directly above it. With the family room and bedroom on the opposite side of the house, expanding the wired Ethernet network conventionally would have been labor intensive. Fortunately, there's a wired networking solution that allows high speed Ethernet to bridge over the existing coax cable (cable TV) network in the home. It's called MoCA.

Before I get into the installation, the next step will cover a quick overview of the coax networking technology. 
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Step 1: What is coax networking (MoCA)?

A coax network is an extension of the existing home network onto the coax cable network in the home. Just like Wi-Fi is the ubiquitous standard for wireless home networks, MoCA is the nearly ubiquitous standard for coax networks. MoCA stands for the Multimedia over Coax Alliance. If your cable service provider offers a service called Multi-Room DVR, they are almost certainly using MoCA to enable it.

The current standard for MoCA is 1.1 and the equipment used in this project is standards compliant. 

A MoCA network is broadcasted roughly between 500MHz and 1.5GHz (1500MHz). The technology is designed so that it does not interfere with the broadcasts of traditional cable TV service. However, satellite TV, which runs on different spectrum, is not compatible with the 1.1 MoCA standard. For their respective multi-room DVR services, they use a proprietary coax networking technology. The MoCA 2.0 standard in development is expected to work for all service providers. 

To get the most detailed and updated information about this technology, visit the MoCA website.

Something about this setup bothers me.

You are splitting your cable signal. One line goes to the cable modem and the other to the MoCA adapter. The network signal then goes into the MoCA adapter which sends your network packets back out through the splitter back to the same wire that's coming in from the public feed.

I'm concerned about security. It seems to me that with your setup you are pushing you network signal back over the public cable segment.

ravin108 (author)  khurtwilliams1 month ago
Hi Khurt,

Very good point. For security, you can purchase a MoCA signal blocker and place it at the entry point of the system.

In many instances, a cable amplifier will also filter the MoCA signal.
fred_elkins2 months ago

Do you actually need cable service for this to work or will it just work with existing coax? I don't have cable but have coax throughout the house

ravin108 (author)  fred_elkins2 months ago
Great question.
No need for active cable service. It will work with an existing coax network. If you have any issues, check the quality of your splitters.
slickwillyj052 months ago

I actually want to do the opposite of ethernet over coax. My house is fully wired with CAT6, but no coax. When Xfinity was installed, the tech would only run a single coax line into my living room. I have a splitter, with one cable going to my TV box and one cable going to my Internet modem (sitting on the TV stand as well). I want to use this device (or any other device) to put additional cable boxes in other rooms using CAT6. I am very tech savvy, so switches, routers, whatever is needed is no problem. I have looked everywhere online and can only find applications for Ethernet over Coax, not Coax over Ethernet. Thanks for any help

This may not be relevant to you anymore, but... If you are not using the ethernet and simply need that cable to act as a coax cable, you are looking for what is called a "balun". Otherwise, if you are wanting both ethernet and and coax, amd you dont need PoE ethernet, you could co-opt these lines to perform the same job the balun would. Over shorter distance (100ft or so) this "shouldn't" create much issue.
ravin108 (author)  slickwillyj051 month ago
Hi Slick,

The MoCA standard won't help you here. You'll need the help of Comcast with Xfinity, I'm afraid.

I have a ZOOM AC1900 Model 5363 cable modem, and 2 Actiontec ECB2500C MoCA adapters. I am setting up my MoCA network for the first time. My modem says, "Integrated MoCA reject filter" I am a little confused about this.

1. From what I have read the filter should go where the cable comes into the house. Does that mean the router or the wall jack?

2. Do I need an adapter attached to the router? Or does the router already have an adapter if it has a filter?

3. I am trying to have MoCA in 3 rooms, 1 room has the router and 1 comcast cable set top box, the other 2 rooms have TIVO premier boxes. I am not sure if I need a third MoCA adapter or not.

ravin108 (author)  lynn.yamagata1 month ago

Hi Lynn,

1. Because your modem has a MoCA filter, you do not need to worry about adding a filter to your system.

2. For you to transition a network from twisted pair to coax cable, you need an adapter.

3. I advise calling TiVO's technical support to answer this question.

craigb54 months ago

Hi, I have a router on a dsl network and use coax cables that run from the HD OTA antenna to each of my two tv's currently. Can I split the coaxial cable coming from the antenna and run it to the router with a moca adapter, and then use the tv coax runs for the network connection as well, using splitters at each tv to avoid the signal interference problems you mentioned? I am planning to use the MOCA setup for a couple of tivo devices. Thanks, Craig

ravin108 (author)  craigb54 months ago

Hi Craig,
Here's a link to a thread about setting up MoCA for OTA antenna setups.

Let us know how it goes.

ravin108 (author) 7 months ago
Thanks for the message!
You would put the filter at the point of entry before the first splitter.
You do not necessarily need an amplifier. It's best to centralize the distribution as much as possible, so go with one 4 way splitter instead of two 2-ways.
You should place the first MoCA adapter where you can best access the Ethrernet network and coax network in one place.
I recommend installing the MoCA adapter with its own dedicated coax run. There's greater margin for error otherwise.
Good luck!
CR48 months ago

Thanks for the MoCA info! I am hoping to hook up a MoCA system in our Adobe home which has many dead spots because the walls are so thick. Fortunately, our house has coax wired into every room. We have a utility closet where the comcast point of entry. We are only using Internet and phone from Comcast- no TV signal.

At the point of entry there is a splitter which the phone modem is hooked into and the other goes to the 1st floor office coax outlet where the modem/router (its an all in one unit, MoCA light is on) resides.

What I want to do is have 4 rooms activated with the MoCA adapters. These 4 rooms have coax outlets where the coax runs from the room to the basement utility closet, where the cable point of entry is.

My questions are:
Do I need a filter at the cable Point of Entry before the 2 way splitter?

Do I replace that 2 way splitter with a 4 way splitter or should I add on a 4 way splitter off the 2 way? if I do that will I need an amplifier?

Can I hook up a MoCA adapter right after the Point of Entry splitter then hook up the 4 way splitter to go off to each room then at the outlets hook up the MoCA adapters. Keeping the modem in the office on the first floor? Or would I hook up the modem in the basement utility closet as well?

Or does anyone know of a MoCA device that hooks into the point of entry which has multiple coax outs? And would something like that work in my house?

Thanks for any input!

Mr.M18 months ago

I have the actiontec ECB2500C MoCA network adapter and the WCB3000N Wireless Ethernet Coax Bridge.

In my home office downstairs:

Adapter: coax from the wall to in port. the out coax is to the modem and the ethernet is to the wifi router . It shows power and ethernet light but coax light is not illuminated.

Bridge: in upstairs room coax from the wall is to the coax port (only one) and of course power. It also shows power light and 2.4 and 5 ghz signal illuminated but no coax light.

Should I put the splitters coming off the coax cable from the wall on both???

Right now with my set up I am getting no internet signal out of the bridge. My wifi router and desktop in my home office down stairs work fine

ravin108 (author)  Mr.M18 months ago
Mr. M1,

If I'm understanding your setup, you need to have a wired Ethernet source entering the adapter though a twisted pair Ethernet cable.
The MoCA adapter transmits that Ethernet signal from the twisted pair cable network to the coax cable network.

If you have that squared away, I do recommend using standards compliant splitters if you have them and the extra patch cable.