6FT Mini Din 8 Pin Male to DB9 Female.
Serial Connection Cable.

DB9-F.......DIN8-M
1...........1
2...........3
3...........5
4...........OPEN
5...........4 and 8
6...........1
7...........2
8...........1
9...........OPEN
SHEILD......OPEN
OPEN........6

Some Example Devices:
Kenwood Ham Radio Din8
AMX, Crestron, or Extron control system
PC by using the NEC PC control utility
NT410/510/1000/1100
LT180
LT30/35
Similar Cables
C2G Compatible 25041
Ours is a Fully Professionally Molded Connector.