Avocent CCM1640 - Manual (Page 95)

Appendices 89
If you choose to use a non-Equinox reversing cable, make sure the cable is
reversing, as shown in Figure B.4.
Figure B.4: 8-wire RJ-45 Reversing Cable
You may also order a Rack Mount Shelf.
RTS
DSR
CD
RD
TD
GND
DTR
CTS