Thanks chaps.
I am familiar with IPCONFIG, so I can do that on each machine. However, I think they all have fixed IP addresses above 200 - so that DHCP can have anything below 200

We have a VOIP phone system, and a bunch of Sonos kit, which is all allocated DHCP IP addresses - obviously a bit hard to type IPCONFIG on the phones etc

I don't have access to the Router, so that will require an IT bod ("tomorrow", rather than "today")

I did tell the phone people that I wanted my server to be the DHCP provider (because at least I can get into that and fiddle), but I don't think they were competent to make that configuration change - so the phone system provides the DHCP

I can connect TDC3 and laptop to a hub/switch and see if I can get it going. I suppose if I can change its IP address thereafter that will then do for the main network (although I'm inclined to let it have its default so that if it gets reset, or somesuch, it doesn't interfere with another device on the LAN already allocated that IP address, and thus I will get 50 excluded from the Phone System DHCP range anyway)
Bummer
