CableWholesale DB9 Female AB 2 Way Switch Box Cable (40D1-10602)

SIENOC 9 Pin RS-232 DB9 Male to Male/Female to Female Serial Cable Gender Changer Coupler Adapter (5 packs of male)

Your Cable Store 6 Foot DB9 9 Pin Serial Port Cable Male / Male RS232

Your Cable Store 3 Foot DB9 9 Pin Serial Port Cable Male / Male RS232

StarTech.com 2m DB9 RS232 Serial 9-Pin Null Modem Female to Male Cable, Black (SCNM9FM2MBK)

StarTech.com 3m Black Straight Through DB9 RS232 Serial Cable - DB9 RS232 Serial Extension Cable - Male to Female Cable

StarTech.com Straight Through Serial Cable - DB9 M/F - 6 Feet (MXT100)

StarTech.com Slimline Serial DB9 Gender Changer - M/M (GC9SM)

StarTech.com 10-Feet Straight Through Serial Cable - M/F (MXT10010)

ES-Tune 2 Way RS232 Serial Switch Box DB9 Pin Serial RS232 Manual Data Switch Box for PC Sharing to Serial Device

CablesOnline 2-Way A/B RJ45 Metal Rotary Manual Switch Box (SB-034)