A MOCA Bridge is an layer 2 ethernet bridge that passes ethernet frames between a MOCA (coax) network segment and a cat5 network segment. The Verizon provided Actiontec or FiOS Quantum Gateway router includes two MOCA bridges.

• A MOCA WAN bridge which provides coax connectivity between the ONT and the router.
  
• A MOCA LAN bridge which provides connectivity between the router and the Verizon Set-Top Boxes (STBs).

If you have FiOS TV with Verizon STBs and also want to run your own router as primary, you will need a MOCA LAN bridge between your router and the STBs. You can use the MOCA LAN bridge in the Actiontec or FiOS Quantum Gateway for this, or you can use a third-party MOCA bridge. See »Verizon FiOS FAQ »What are the tradeoffs between the various router configurations for connectivity options.

A MOCA bridge is also a good way to extend connectivity into rooms that do not have a cat5 connection. See the following FAQ: »Verizon FiOS FAQ »Can I get an ethernet connection in a room with only coax?

Several third-party MOCA bridges are currently available: 

• Official FiOS Network Extender* - Available new only from »www.verizon.com/home/acc ··· xtender/
• Actiontec WCB3000N* - (a Verizon-branded version is also available on eBay)
• Actiontec WCB6200Q* - (a non-Verizon-branded version of the official FiOS Network Extender)
• Actiontec ECB2500
• Actiontec ECB6000
• Actiontec ECB6200

*Indicates the device is also a wireless access point

Also, MOCA routers can be used as a MOCA bridge, such as:

• Actiontec MI424-WR router - available used on eBay for $5 - $70, depending on hardware revision.
• FiOS Quantum Gateway- Also available on eBay.