Any Router will do for your needs. However, the two machine will connect to the router using ethernet. The G3 has ethernet built in but it sounds as though the PC does not have that capability. You can purchase a PCI Ethernet card quite cheaply at any computer store.
The link goes, DSL Modem to Router, Router to PC's/Mac. Get a Four Port router and you will be set
I have an older pentium PC and a G4 Power Mac. The PC has a dial-up type modem and the Mac uses DSL and I want them to use the same router. Is this possible and if so, what kind of router should I get.
Thanks in advance,