DB9 Adapter Mini Gender Changer Rs232 Adapter Male to Male Connector.
 
A DB9 Male to Male connector (often called a DB9 Male Gender Changer) is used to link two female DB9 cables together or to convert a female port into a male port. Just like the female version, choosing the right internal wiring is critical for your data to flow correctly.
 
Internal Wiring Configuration
Straight-Through Coupler:
Pins connect sequentially pin-to-pin 1 -> 1, 2 -> 2, 3 -> 3, etc.).
Used to extend standard male-to-female serial cables
 
Form Factor
Mini Gender Changer: A tiny, low-profile adapter that screws directly into an existing port to change its gender without adding bulky cable length.