Another miscellaneous cable from the data rack, the venerable RS232 Serial comms cable. Once widely in use but not so much these days but very handy if you happen to working with old IT gear which "talks" to the outside world using serial communications, specifically RS232 standards.
This is a cross-over or "null modem" cable, not a straight-thru type, meaning that the TX pin is directly connected to the RX pin of the opposite connector. I have checked all the connections at each end and also can confirm that the CTS pin is directly connected to the CTR pin at the opposite connector. All other pins are not connected together or to any pin at the other end of the cable.
Here is a diagram of the wiring which I hope makes this clearer ...
HEWLETT PACKARD - Communications Lead
RS232 DCE (Data Communication Equipment) Interconnection Lead
DB9 Female at both ends
Part # 190605-001 REV.A HH
Fine up to 115,200 baud (quality cable and a relatively short length)
Length: 195cm
Tested and confirmed to be wired as described above
COSMETIC CONDITION:
USED
Clean
NO damage to either connector
NO damage to the rugged industrial Black sheath
Now packed into a sealed clear plastic packet
