Apologies for a post that may be replicated elsewhere, but I can't find the information I need. Or I'm just not understanding it all.

I am self taught in networking, so I have SOME basics, but I'm not an expert by ANY stretch.

So, because i've been switched over to VOIP by Vodafone I am trying to find a way to use the HG659 router in my network so it can receive VOIP calls. 

I have an Edgerouter SPF X as my main router. It's been working just fine with the WAN cable from my cable modem attached to ETH0.

eth0.10 VLAN

(note in all the following that I may have misconfigurations. I just don't know.)

I have found this setup:

https://www.geekzone.co.nz/forums.asp?forumid=40&topicid=198107&page_no=3

But it does not work.

I have tried to follow the instructions here to turn on bridge mode:

http://help.vodafone.co.nz/app/answers/detail/a_id/27703

(Including turning off the VLAN because of a comment I found elsewhere)

 Because my understanding is that this would let me have the VF router be dumb and my Edgerouter handle everything. Except the VOIP.

But when I turn on bridge mode (according to the above instructions) the Internet light turns off. 

(I had an incredibly frustrating conversation with a Vodafon "ninja" who insisted that bridge mode is not for this. It DOES disable the internet and is not what I want. This goes against everything I've been seeing on these forums or elsewhere. I believe I'm correct that I want bridge mode??)

And certainly the Edgerouter can't see anything useful.

I have extra questions as well that are not answered clearly anywhere I've been able to find.

Which ports get connected to where.

I assume the Cable Modem (WAN) > HG659 (WAN) ports is the first connection.

But then which ports do I connect the Edgerouter? Do I connect the WAN port (currently eth0) to a HG659 ethernet port. Or do I reconfigure the eth0 to a standard ethernet port? Assuming I can, and haven't misunderstood something.

Thank you for any help you can provide. This is driving me crazy!