RJ-45 (Cyclades) to RJ-45 (Sun/Cisco), crossover
-------- ---------
3 TxD ------------ RxD 6
6 RxD ------------ TxD 3
4 Gnd --------|--- Gnd 4
|--- Gnd 5
2 DTR ------------ DSR 7
7 DCD ------------ DTR 2
1 RTS ------------ CTS 8
5 CTS ------------ RTS 1