Trying to get a modem into proper bridge mode

My ISP has given me a real piece of crud fiber-optic modem, and I'm trying as much as possible to tu it into a dumb pipe, and have my Mikrotik RouterBoard do all the real work.

This is tuing out to be more complicated than I thought, and it's not made easier by the fact that I'm in China, and the modem web interface is all in Chinese. I speak Chinese well, but... not networking Chinese.

I've gotten into the modem's "secret admin interface", and found the router/bridge switch, but no matter how I fool with the settings, I can't log in to the PPPoE account with the Mikrotik.

Once I've set the modem to bridge mode, there are many other settings:

1. Protocol (leaving at ipv4 for simplicity's sake)
2. MTU (presumably 1500 is fine)
3. Vlan on/off (I know theoretically what vlan is, but do not know how it comes into play here)
4. "service mode" (possibly an incorrect translation). My choices are "inteet", "other" and "IPTV". Guess I'm choosing between inteet and other.

Then I have "port binding" (another translation guess). I can check as many as I like of four etheet ports and four wireless SSIDs. I don't know what this means.

If I choose "other" for the service mode, I also get a big table for vlan port binding (pinning?), also four ports and four SSIDs.

I don't know if I'm supposed to be using vlan at all, and I don't know if I should be binding ports. I just want to run a cable between the modem port 1, and the Mikrotik WAN port, and be done with the modem. Currently, no matter how I set things, the PPPoE dialer on the Mikrotik just says "connecting..." and never does.

At present I've bound the Mikrotik's MAC address to 192.168.1.2 in the modem interface, then shut off DHCP and NAT (and wireless) on the modem. Maybe this is actually good enough -- I should already be avoiding double NAT, right?

Any insight into how to handle the service mode and port binding would be much appreciated!

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