Connecting T23G to iMac for internet

[karLP]

    Hi, I am trying to connect my T23G voip phone to my iMac to use it as a router through the ethernet connection. I don't have a mains connection in the room where I can work.

Having shared the wifi internet access through the ethernet connection the T23G can now make calls out from the phone. However, I am not receiving calls in.

From the attached the phone or iMac has self assigned an IP address to the phone, however the IP address shown through menu>status>IPv4 is different.

I'm not sure what the next step would be to get a clear connection between the phone and the internet which allows to take calls in and make calls out and was wondering if anyone could help?

Thanks in advance