Hardware/Ethernet Switch Console Cables
RJ-45 - Looking at the connector from the non-cable end, with pins facing down, pins are counted left (1) to right (8), on regular ethernet patch leads, 1 is the Orange-White or Green-White conductor and 8 is the Brown conductor.
Male DB-9 - Usually numbered, but if looking at a male DB-9 from the non-cable end with the larger side towards the top, pins 1-5 left to right on top row, 6-9 left to right bottom row.
|1||CD (Carrier Detect)|
|4||DTR (Data Terminal Ready)|
|6||DSR (Data Set Ready)|
|7||RTS (Request To Send)|
|8||CTS (Clear To Send)|
|9||RI (Ring Indicator)|
|N/C||1 & 9||N/C|
Cisco kit uses a similar DB-9 to RJ-45 adapter, except the RJ-45 side is rolled over/inverted (ie, pin 1 to pin 8, pin 2 to pin 7, etc), and pin 4 and 5 on the RJ-45 side is connected back to ground.
The molded Cisco cable acts as a DB-9 to RJ-45 + rollover combo. Adding another DB-9 to RJ-45 adapter to this gives a null modem configuration.