Yo ciscorat do this
Parts: 1 back to back cable (basically a serial cable that is crossed)
Personally I prefer the modular cables available from kg2.com. The are reconfigurable without plugging and unplugging from the serial ports of the router.
Well lets get started.
Most any cisco router hase the ability to simulate a frame-relay switch.
So pick the router that has the most serial ports and issue these commands
Frame-relay switching
interface Serial0
no ip address (ip address is optional on frame-relay interfaces)
encapsulation frame-relay
no fair-queue
clockrate 56000
frame-relay lmi-type cisco
frame-relay intf-type dce
Commands for non frame relay switch
encapsulation frame-relay
no ip address (apply an ip address if you prefer both ends)
no fair-queue
clockrate 56000
frame-relay lmi-type cisco
Wala you now have a point to point frame switch.
Reference: