I have two Cisco 1602s both with an onboard 56K DSU interface, using an RJ-45 plug. I need to knwo what kind of cable i need to make a crossover conenction between these two routers. Can i use a standard ethernet crossover cable? I have the tools to make UTP RJ-45 cables in any length i desire, can i just use a higher strength wire than UTP, and get the same effect?

I don't think a standard crossover cable will work. I believe that the DSU cable only uses 4 wires. You should have the connecting diagram in the CISCO documentation. The input on one goes to the output on the other and the reverse for the other.

In further research, i've found i was worng on the jack type. It's not an RJ-45, it's an RJ-48S, which is physically compatible with the RJ-45 Jack, but has a different Pin Out. If my understanding is correct, for T1 DSU connections, you 'should' use a shielded two pair per pair twisted pair cable, inserted into a standard Crimp On RJ-45 male jack, with the different pinout. For 56K DSU connections, standard UTP with the different pinout, on the standard RJ-45 jack, should be sufficient. THe following link has more information about the pinouts of an RJ-48S adapter. http://www.cisco.com/warp/public/471/75.pdf Is my understanding correct, or have i missed something?