said by r_2016:On my Motorola HD box (I think 7100 series) I noticed that there is an rj-45 jack on the back; does anyone know if this box can be used as a Moca bridge
The RJ-45 jack is not active.
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Verizon FiOS FAQ »
Are the ethernet jacks & USB ports on my STB active?said by r_2016:I think the limit for Moca devices on Verizon Fios 1.0 is 8 if I am not mistaken; does anyone know if this is counting the ONT?
You're referring to the MOCA 1.0 specification (not FIOS).
The limit for the MOCA 1.0 specification is indeed 8. That includes the Actiontec. The ONT is not counted as that is on the MOCA WAN channel, not the MOCA LAN channel.
said by r_2016:Right now I have 4 set top boxes and 2 netgear Moca devices that communicate directly with my Actiontec router;
I count 7 devices including the router, so you should be able to add a third MOCA LAN bridge.