Hi,
It’s DB9 male to male straight (not mirrored, not crossed).
Pin 1 to pin 1, pin 2 to pin 2, ….. pin 9 to pin 9.
Some sell them as ‘special’ RS422 cables asking loads of dollars for it, but many sell them simply as serial cable and only for a few dollars. I never experienced any trouble using them, even when using them for longer distances.
Use Google and search for ‘DB9 male-male cable’ or something like that and you will find tens, no hundreds of companies all selling the same stuff.
Hope this helps,
Thero Stals
Blackmagic Design Europe