This null modem cable adapter features one DB9 male and one DB9 female connector - a cost-saving way to convert a straight through cable into a null modem cable.
Specifications
Summary
Product Description
StarTech.com DB9 RS232 Serial Null Modem Adapter - Null modem adapter - DB-9 (M) to DB-9 (F) - NM9MF - null modem adapter - DB-9 to DB-9