Hi Chris, and thanks for your input. Most of what you say is over my head.
The modem is relatively new from my ISP, as are the cables, some of which run underground from the media box in my house to my studio where the Amiga is located, so changing them out is impractical at the moment.
I am not familiar with DHCP, nor how to edit the tcp/ip software. This is a complex network and my skill set is not good enough to mess with it. Push comes to shove, I would have to hire someone to check things out, and finding someone in this neck of the woods that is familiar enough with Amiga hard and software is nigh on to impossible.
Am still trying to determine what tcp/ip software the Amiga is using, as it says that Miami is not installed, yet the machine is able to connect with the internet.
I understand what you are saying about device numbers all having the same first three sets, and they all do, including the Amiga. The only difference appears to be the last digits, EG: there are six computers in the network, and in five of them, the last digits are only two numbers and they are sequential, with the exception of the Amiga which has three.
Regards