Hi,

I'm trying to do this initial installation as follows:

modem (in bridge or pass through mode) -> Airport Extreme (provides PPPoE login, DHCP & NAT) -> Grandstream

I am getting a dial tone but get a busy signal dialing out.

From what I've read here, what I need to do is assign a static IP to the GS and forward the specified ports. The problem is, to do this in my router I need to know the device MAC address, which I don't have. I can't seem to access the GS via the browser interface at 192.168.2.1 using my computer, and I think I saw in the manual for the GS that this does not work from Mac OSX. Any ideas?