Building a HP ProCurve DB9 Serial port adapter
For use with a standard Cisco Console Cable.
Grab a regular Cisco DB9 to RJ45 console cable and any DB9 to RJ45 modular adapter.
Close-ups of the cable pinouts – pictures were taken off a camera phone.
Modular Adapter Cable to Pin chart:
RJ45 Female (Cable Color) DB9 Serial Female1 – White 82 - Brown 63 – Yellow 24 - Green Unused – Clip or push aside5 - Red 56 - Black 37 - Orange 48 - Blue 7
Also, a handy bit on information for if you ever find yourself in the position of having access to one of the DB9-RJ45 adapters shown above but no rollover cable.
The cable layout of a Cisco DB9 to RJ45 console cable is as follows:
Pin 1 — Blue wire
Pin 2 — Orange wire
Pin 3 — Black wire
Pin 4 — Red wire
Pin 5 — Green wire
Pin 6 — Yellow wire
Pin 7 — Brown wire
Pin 8 — Grey/White wire
Using a cat5e cable with a modified female modular adapter. Wire the modular adapter as follows:
Blue cable to position 8
Orange cable to position 6
Black cable to position 2
Yellow cable to position 3
Brown cable to position 4
Grey/white cable to position 7
Red and green cables spliced together to position 5
Join the bare wires from each cable together and secure with insulation tape.
Other Serial Info:
Null Modem Pinout (http://www.lammertbies.nl/comm/info)
Connector 1 Connector 2 Function
2 3 Rx Tax
3 2 Tx Rx
4 6 DTR DSR
5 5 Signal ground
6 4 DSR DTR
7 8 RTS CTS
8 7 CTS RTS